{"title":"YVY","description":"\u003cp\u003eEvery YVY e-bike and spare part at Redtail. YVY is the brand of HK Ridstar Trade Limited, which also builds the Ridstar range we stock — its parts are listed by the same model codes across both, so a YVY charger or battery is ordered by naming your model rather than your brand. Prices are matched to YVY's own US storefront, and every specification on these pages is quoted from what YVY publishes, with the gaps and the contradictions named rather than smoothed over.\u003c\/p\u003e","products":[{"product_id":"yvy-k16","title":"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels","description":"\u003cdiv class=\"sb-flow\"\u003e\n\u003cstyle\u003e\n.sb-flow{--sb-ink:#111;--sb-sub:#555;--sb-line:#e8e8e8;--sb-accent:#c8102e;--sb-good:#0a7d3f;--sb-warn:#b3261e;font-family:inherit;color:var(--sb-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.sb-flow *{box-sizing:border-box;}\n.sb-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.sb-flow h3{font-size:1.25rem;font-weight:700;margin:0 0 .6rem;}\n.sb-answer{max-width:900px;margin:0 auto 2.5rem;padding:1.5rem 1.75rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-accent);border-radius:14px;background:#fcfcfc;}\n.sb-answer p{margin:0;font-size:1.1rem;color:var(--sb-ink);}\n.sb-answer .sb-q{display:block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-accent);margin-bottom:.6rem;}\n.sb-stats{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:0;width:100%;margin:0 auto 3rem;padding:0;border:1px solid var(--sb-line);border-radius:18px;overflow:hidden;}\n.sb-stats li{flex:1 1 150px;padding:1.6rem 1rem;text-align:center;border-right:1px solid var(--sb-line);}\n.sb-stats li:last-child{border-right:0;}\n.sb-stats b{display:block;font-size:1.6rem;font-weight:800;letter-spacing:-.02em;}\n.sb-stats span{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--sb-sub);margin-top:.3rem;}\n.sb-fit{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:0 0 1rem;}\n.sb-fit ul{margin:.4rem 0 0;padding-left:1.1rem;}\n.sb-fit li{margin:.35rem 0;color:var(--sb-sub);}\n.sb-feat{display:grid;grid-template-columns:1.4fr 1fr;gap:2.5rem;align-items:center;width:100%;margin:0 auto;padding:2.5rem 0;}\n.sb-feat:nth-of-type(even){grid-template-columns:1fr 1.4fr;}\n.sb-feat__media{min-width:0;}\n.sb-flow .sb-feat__media img{display:block!important;width:100%!important;height:auto!important;max-width:100%!important;object-fit:contain!important;border-radius:20px;box-shadow:0 24px 60px -28px rgba(0,0,0,.35);}\n.sb-feat__txt h3{font-size:2.1rem;font-weight:800;letter-spacing:-.02em;margin:0 0 .8rem;line-height:1.12;}\n.sb-feat__txt p{font-size:1.08rem;color:var(--sb-sub);margin:0;max-width:52ch;}\n.sb-feat__kicker{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-accent);margin-bottom:.6rem;}\n.sb-feat:nth-of-type(even) .sb-feat__media{order:2;}\n.sb-ledger{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0 0;}\n.sb-ledger\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.4rem 1.6rem;}\n.sb-ledger h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;}\n.sb-ledger--good h3{color:var(--sb-good);}\n.sb-ledger--bad h3{color:var(--sb-warn);}\n.sb-ledger ul{margin:.6rem 0 0;padding-left:1.1rem;}\n.sb-ledger li{margin:.5rem 0;color:var(--sb-sub);}\n.sb-tablewrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--sb-line);border-radius:18px;margin:1rem 0 0;}\n.sb-tablewrap table{width:100%;border-collapse:collapse;min-width:400px;}\n.sb-tablewrap th,.sb-tablewrap td{padding:.85rem 1.2rem;border-bottom:1px solid var(--sb-line);text-align:left;font-size:.97rem;vertical-align:top;}\n.sb-tablewrap thead th{background:#fafafa;font-weight:700;}\n.sb-tablewrap tr:last-child td{border-bottom:0;}\n.sb-tablewrap td:first-child,.sb-tablewrap th:first-child{font-weight:600;}\n.sb-src{font-size:.85rem;color:var(--sb-sub);margin:.7rem 0 0;}\n.sb-src a{color:var(--sb-sub);}\n.sb-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1rem 0 0;}\n.sb-cards\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.3rem 1.5rem;}\n.sb-cards h3{font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--sb-accent);}\n.sb-cards p,.sb-cards li{color:var(--sb-sub);font-size:.95rem;}\n.sb-cards ul{margin:.5rem 0 0;padding-left:1.1rem;}\n.sb-faq{margin:1rem 0 0;border:1px solid var(--sb-line);border-radius:18px;overflow:hidden;}\n.sb-faq details{border-bottom:1px solid var(--sb-line);}\n.sb-faq details:last-child{border-bottom:0;}\n.sb-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.sb-faq .sb-a{padding:0 1.5rem 1.2rem;color:var(--sb-sub);margin:0;}\n.sb-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--sb-line);border-radius:14px;font-size:.9rem;color:var(--sb-sub);}\n.sb-hero{width:100%;border-radius:20px;overflow:hidden;margin:0 0 .6rem;position:relative;}\n.sb-hero img{width:100%;height:auto;display:block;}\n.sb-cap{font-size:.86rem;color:var(--sb-sub);margin:0 0 2rem;padding-left:.2rem;font-style:italic;}\n.sb-bib{margin:1rem 0 0;padding-left:1.4rem;}\n.sb-bib li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;color:var(--sb-sub);}\n.sb-cite{font-weight:600;color:var(--sb-ink);}\n.sb-measured{margin:2rem auto;padding:1.4rem 1.6rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-good);border-radius:14px;background:#fbfdfb;}\n.sb-measured h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-good);margin:0 0 .5rem;}\n.sb-measured p{margin:0;color:var(--sb-ink);}\n.sb-measured .sb-src{margin-top:.6rem;}\n.sb-notes{margin:1rem 0 0;padding:1.2rem 1.5rem;border:1px solid var(--sb-line);border-radius:16px;}\n.sb-notes li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-law{margin:1rem 0 0;padding:1.4rem 1.7rem;border:1px solid var(--sb-line);border-left:4px solid #444;border-radius:14px;background:#fafafa;}\n.sb-law blockquote{margin:.8rem 0;padding-left:1rem;border-left:3px solid #ccc;font-style:italic;color:var(--sb-ink);}\n.sb-law p{margin:.6rem 0;color:var(--sb-sub);}\n.sb-law .sb-stat{font-weight:700;color:var(--sb-ink);}\n@media(max-width:800px){.sb-feat,.sb-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.sb-feat:nth-of-type(even) .sb-feat__media{order:0;}.sb-feat__txt h3{font-size:1.6rem;}.sb-ledger,.sb-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"sb-hero\"\u003e\u003cimg loading=\"eager\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/2_ad031295-5164-4050-92a5-29c94a7fcb00.jpg?v=1787706625\" alt=\"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cp class=\"sb-cap\"\u003eSame power, smaller wheels. The K16 is the one bike here YVY sizes for riders under 5 ft 4 in.\u003c\/p\u003e\n\u003cdiv class=\"sb-answer\"\u003e\n\u003cspan class=\"sb-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThe K16 is the small-wheel bike in YVY's range at $749: the same 1500W motor and 48V 20Ah battery as the K20, but on 16x4.0 wheels instead of 20-inch, with mechanical disc brakes. YVY recommends it for riders from 5 ft 2 in, the lowest starting height in the line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"sb-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003e1500W\u003c\/b\u003e\u003cspan\u003eMotor, as rated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e960Wh\u003c\/b\u003e\u003cspan\u003e48V x 20Ah battery\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e16 x 4.0 in\u003c\/b\u003e\u003cspan\u003eWheels\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e5 ft 2 in\u003c\/b\u003e\u003cspan\u003eLowest rider height\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e330 lb\u003c\/b\u003e\u003cspan\u003eMaximum load\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho the K16 is for\u003c\/h2\u003e\n\u003cdiv class=\"sb-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShorter riders. YVY recommends this bike from 5 ft 2 in, two inches lower than every other model in the range\u003c\/li\u003e\n\u003cli\u003eRiders who want the K20's 1500W motor and 960Wh pack in a physically smaller bike\u003c\/li\u003e\n\u003cli\u003eTight storage — smaller wheels make a meaningfully shorter bike to get through a door or into a truck bed\u003c\/li\u003e\n\u003cli\u003eStop-start riding: smaller wheels spin up faster, which suits short urban hops more than long open roads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou are tall. YVY's recommended range tops out at 6 ft 0 in here against 6 ft 2 in on the 20-inch bikes\u003c\/li\u003e\n\u003cli\u003eYou ride rough ground at speed — a 16-inch wheel drops into potholes a 20-inch wheel rolls over, whatever the tire width\u003c\/li\u003e\n\u003cli\u003eYou need YVY's range figures to agree. This page publishes its pure-electric and pedal-assist ranges two different ways\u003c\/li\u003e\n\u003cli\u003eYou want hydraulic brakes: this model is specified with mechanical discs, like the K20 Lite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/6_05a72d0b-95a9-4e5a-bb2f-1d77d97d1c64.jpg?v=1787706631\" alt=\"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels — 16 x 4.0 — the reason this bike exists\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eWheels\u003c\/span\u003e\u003ch3\u003e16 x 4.0 — the reason this bike exists\u003c\/h3\u003e\n\u003cp\u003eEvery other bike YVY sells rides on 20 x 4.0 wheels. This one drops to 16 inches while keeping the 4.0-inch width, which lowers the whole bike and shortens it. That is what lets YVY recommend it from 5 ft 2 in rather than 5 ft 4 in. The trade is real: a smaller wheel has a worse angle of attack on potholes and edges, so it is a better city bike than a rough-ground bike.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/7_ddf88933-d8d8-44df-b25e-d258da26e7e0.jpg?v=1787706628\" alt=\"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels — The K20's full 1500W, unchanged\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eMotor\u003c\/span\u003e\u003ch3\u003eThe K20's full 1500W, unchanged\u003c\/h3\u003e\n\u003cp\u003eYVY rates this hub at 1500W with 85 N·m of torque and a 35-degree climbing claim — identical to the K20's figures. Smaller wheels with the same motor means more torque at the rim, which is why this bike feels quick off the line. It also means the same legal position: 1500W is double the 750W ceiling in the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/5_92f43cbf-074f-47b7-8e1f-76768c0294c6.jpg?v=1787706635\" alt=\"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels — 960Wh, and a charging spec with a real number in it\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003e960Wh, and a charging spec with a real number in it\u003c\/h3\u003e\n\u003cp\u003eThe 48V 20Ah pack is the same 960 Wh as the K20's, by our arithmetic from YVY's volts and amp-hours. This page also gives the most specific charging figure YVY publishes anywhere: 4 to 6 hours at 3A. Elsewhere in the range they quote hours without an amperage, so this is the one page where you can actually check the claim.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/3_ada2d1c3-225c-49d2-bb9c-879cbac1c7b6.jpg?v=1787706640\" alt=\"YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels — 5 ft 2 in to 6 ft 0 in, 330 lb all-in\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eFit\u003c\/span\u003e\u003ch3\u003e5 ft 2 in to 6 ft 0 in, 330 lb all-in\u003c\/h3\u003e\n\u003cp\u003eYVY's FAQ gives a recommended height of 5.2 to 6.0 feet for this model, against 5.4 to 6.2 for the 20-inch bikes. If you are near either end, that two-inch shift is the whole reason to choose between them. The 330 lb maximum load is unchanged and, as everywhere in this range, it counts rider plus cargo together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eWhere this bike sits in US law\u003c\/h2\u003e\n\u003cdiv class=\"sb-law\"\u003e\n\u003cp\u003eBikes in this power class raise one question before any other, so here is the statute rather than a summary of it. Federal law defines the category this way:\u003c\/p\u003e\n\u003cblockquote\u003ethe term “low-speed electric bicycle” means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.\u003c\/blockquote\u003e\n\u003cp class=\"sb-src\"\u003e15 U.S.C. § 2085(b) (Pub. L. 107–319, § 1, Dec. 4, 2002, 116 Stat. 2776). Retrieved 2026-08-25 from the U.S. Government Publishing Office and confirmed word for word against Cornell's Legal Information Institute the same day.\u003c\/p\u003e\n\u003cp\u003eYVY publishes this bike's motor as \u003cspan class=\"sb-stat\"\u003e1500W brushless (YVY's rating)\u003c\/span\u003e and its top speed as \u003cspan class=\"sb-stat\"\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/span\u003e. Set those figures against the threshold above and you can see for yourself that the manufacturer's own numbers fall outside the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003cp\u003eWhat that means in practice is decided by your state, not by us. Many states apply moped, motor-driven cycle or off-highway vehicle rules to machines above the federal threshold, and those rules can reach registration, insurance, licensing, helmet requirements and which paths and trails you may use. Some states set their own wattage ceilings that differ from the federal one. We cannot tell you how your state treats this bike, and we are not going to guess: check before you ride on any public road, bike path or trail.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eStart here: \u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e. Current as of 2026-08-25; state law changes, so re-check yours before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"sb-ledger\"\u003e\n\u003cdiv class=\"sb-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFull 1500W motor and the full 48V 20Ah (960Wh) pack — YVY did not shrink the powertrain to match the wheels\u003c\/li\u003e\n\u003cli\u003eThe only bike in YVY's line sized for riders from 5 ft 2 in, which is a genuine gap-filler in a range built around one frame\u003c\/li\u003e\n\u003cli\u003eCharging spec is the most precise YVY publishes anywhere: 4-6 hours at 3A, with the amperage actually stated\u003c\/li\u003e\n\u003cli\u003eSame 330 lb load ceiling as the larger bikes despite the smaller wheels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYVY's page contradicts itself on both range figures: the bullets say 50 miles throttle and 75 pedal-assist, the FAQ on the same page says 30 and 50\u003c\/li\u003e\n\u003cli\u003eMechanical disc brakes on a bike YVY rates at 1500W and 28+ mph — the same motor the K20 pairs with hydraulic brakes\u003c\/li\u003e\n\u003cli\u003eThe URL says q16 and the page says K16. A small thing, but it is the kind of inconsistency that makes a spec sheet harder to trust\u003c\/li\u003e\n\u003cli\u003eCertification does not cover this bike. YVY links an EN 15194:2017 test report from every page, but that report names model FM-002\/CDDA20, a cargo electric bicycle, and no UL 2849 or UL 2271 certification is published for anything in the range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the K16 compares\u003c\/h2\u003e\n\u003cp class=\"sb-src\"\u003eAll figures are YVY's own published specs, read from each model's archived product page on 2026-08-25. A dash means YVY publishes no figure for that model.\u003c\/p\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eK16\u003c\/th\u003e\n\u003cth\u003eK20\u003c\/th\u003e\n\u003cth\u003eK20 Lite\u003c\/th\u003e\n\u003cth\u003eK20 Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$749\u003c\/td\u003e\n\u003ctd\u003e$769\u003c\/td\u003e\n\u003ctd\u003e$659\u003c\/td\u003e\n\u003ctd\u003e$1,399\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1500W brushless\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e749 Wh\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange (claimed)\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eMechanical disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e16 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSource: each model's page on yvyebike.com, archived 2026-08-25. — = not published by YVY for that model.\u003c\/p\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1500W brushless (YVY's rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque\u003c\/td\u003e\n\u003ctd\u003e85 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e960 Wh (our arithmetic: 48V x 20Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging time\u003c\/td\u003e\n\u003ctd\u003e4-6 hours at 3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle-only range\u003c\/td\u003e\n\u003ctd\u003eUp to 50 miles in the bullets, up to 30 miles in the FAQ (see notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedal-assist range\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles in the bullets, up to 50 miles in the FAQ (see notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheels and tires\u003c\/td\u003e\n\u003ctd\u003e16 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eMechanical disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuspension\u003c\/td\u003e\n\u003ctd\u003eReinforced front fork and rear shock absorber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003e7-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiding modes\u003c\/td\u003e\n\u003ctd\u003ePure electric, pedal assist, pedal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eMulti-function LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClimb rating\u003c\/td\u003e\n\u003ctd\u003eUp to 35 degrees, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater resistance\u003c\/td\u003e\n\u003ctd\u003e\"IP5\", as printed by YVY (not a complete IP code)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended rider height\u003c\/td\u003e\n\u003ctd\u003e5 ft 2 in - 6 ft 0 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting\u003c\/td\u003e\n\u003ctd\u003eLED headlight and tail light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003e7.2 in phone holder, storage box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003e90% pre-assembled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eNo UL 2849 or UL 2271 certification published. YVY links an EN 15194:2017 test report sitewide, but it covers model FM-002\/CDDA20, a cargo e-bike — not this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (motor, battery, charger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications as published by YVY at \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-q16-1500w-fat-tire-electric-bicycle\u003c\/span\u003e, archived 2026-08-25. YVY publishes no specification table for any of its bikes, so every figure above was read out of the copy on that page and the sentence behind each one is on file. Watt-hour totals are our arithmetic and are marked as such. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to read this spec sheet\u003c\/h2\u003e\n\u003cp\u003eManufacturer pages contain marketing, and marketing sometimes disagrees with the marketing an inch below it. Rather than quietly pick numbers, here is every place YVY's own page disagrees with itself for this model, every figure it leaves out, and what we did about each:\u003c\/p\u003e\n\u003cdiv class=\"sb-notes\"\u003e\u003cul\u003e\n\u003cli\u003eBoth range rows carry two figures because YVY's page states them twice, differently. The bullet list says \"up to 50 miles in pure electric mode and up to 75 miles in pedal assist mode\"; the FAQ lower down the same page says 30 and 50. We print both and adopt neither.\u003c\/li\u003e\n\u003cli\u003eThe product handle on YVY's own URL reads q16 while the page title and body both read K16. We use K16, the name printed on the page.\u003c\/li\u003e\n\u003cli\u003eThe 16-inch wheel size is stated twice on the page, in the bullet heading and in the body text, so it is the one geometry figure here that is unambiguous.\u003c\/li\u003e\n\u003cli\u003eBattery energy in watt-hours is our arithmetic: 48 volts x 20 amp-hours = 960 Wh.\u003c\/li\u003e\n\u003cli\u003e\"IP5 waterproof\" is reproduced as printed. A complete IP code needs two digits or an X placeholder, and we do not guess which was meant.\u003c\/li\u003e\n\u003cli\u003eYVY publishes no specification table for any bike. Every figure here was read out of marketing prose, with the sentence behind each recorded in research\/yvy\/specs_20260825.json.\u003c\/li\u003e\n\u003cli\u003eYVY links two PDFs from every page: an EN 15194:2017 test report (report ATS240329142LR, issued 2 April 2024 by Shenzhen ATS Testing Technology, for model FM-002\/CDDA20, a cargo electric bicycle) and the EUIPO trade mark certificate for \"Ridstar\". Neither covers this model. We say so rather than let a sitewide certificate imply cover it does not give.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-measured\"\u003e\n\u003ch3\u003eWhat we counted\u003c\/h3\u003e\n\u003cp\u003eWe pulled YVY's entire live catalogue on 2026-08-25 — all \u003cstrong\u003e46 published listings\u003c\/strong\u003e — and worked out what is actually on sale. Of \u003cstrong\u003e13 bike listings, only 7 are distinct bikes\u003c\/strong\u003e: 6 are the same machines listed a second time, which we proved from byte-identical descriptions, shared image files and, in three cases, by opening the photographs. Six of the thirteen bike listings are the same bikes listed twice — proven by byte-identical descriptions, shared image files, and in three cases by opening the photographs. The duplicates are priced $30–$550 above the merchandised listing of the same bike. We list one page per bike, priced against the listing YVY actually merchandises.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eRedtail original analysis, counted from YVY's public storefront feed and collection endpoints on 2026-08-25; every price cross-checked against a second, independently fetched endpoint (46 of 46 listings agree across two independently fetched endpoints). Availability moves; email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e for anything not shown here.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame and other components\u003c\/td\u003e\n\u003ctd\u003eNot separately stated in YVY's published warranty terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInbound and outbound repair shipping\u003c\/td\u003e\n\u003ctd\u003eCovered by YVY inside the warranty period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eDefects in hardware or firmware under regular use during the warranty period. YVY states it will repair or replace, at no charge, a product or part that proves defective because of hardware malfunction under regular use and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep proof of purchase — YVY excludes claims with no associated purchasing proof, invoice or receipt\u003c\/li\u003e\n\u003cli\u003eReport the fault inside the 1-year window; YVY dates coverage from receipt or purchase, whichever is later\u003c\/li\u003e\n\u003cli\u003eKeep the original packaging for a period after delivery, which YVY asks for directly in its product listings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConditions, malfunctions or damage not resulting from defects in hardware or firmware\u003c\/li\u003e\n\u003cli\u003eClaims with no purchase proof, invoice or receipt, and no authorised dealer confirmation\u003c\/li\u003e\n\u003cli\u003eReturn shipping when the product is found to have no quality issue, or is confirmed working by YVY's after-sales engineers\u003c\/li\u003e\n\u003cli\u003eFaults reported after the warranty period, which YVY offers to resolve at material cost instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eYVY Limited Warranty issued by YVY Bikes, as published on its \u003cspan class=\"sb-cite\"\u003ewarranty page\u003c\/span\u003e. One caveat worth knowing: that page lists its “Warranted Products” as the Q20, Upgraded Q20 and Q20Pro — model names that do not appear on YVY's current storefront. The 1-year motor, battery and charger term above is therefore taken from this bike's own product listing, which states it directly. File with Redtail, not with the manufacturer: we are the merchant of record on this order and we open and carry the warranty claim on your behalf.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.\u003c\/p\u003e\n\u003cp\u003eShips via trusted parcel and freight carriers — UPS, FedEx, and LTL freight for larger items — with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours; claims submitted after this window are not accepted.\u003c\/p\u003e\n\u003cp\u003eBikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours (3 days) of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e · \u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. YVY publishes its own \u003cspan class=\"sb-cite\"\u003eshipping\u003c\/span\u003e and \u003cspan class=\"sb-cite\"\u003ereturn\u003c\/span\u003e terms, which apply to orders placed directly with YVY, not to orders placed here.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"sb-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhat is the difference between the YVY K16 and the K20?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eWheel size and brakes. The K16 rides on 16 x 4.0 wheels against the K20's 20 x 4.0, which makes it a smaller bike suited to riders from 5 ft 2 in rather than 5 ft 4 in. It also uses mechanical disc brakes where the K20 has hydraulic ones. The motor (1500W), the battery (48V 20Ah, 960 Wh), the 7-speed drivetrain and the 330 lb load ceiling are the same on both. The K16 is $20 cheaper.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow far can the K16 actually go on one charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY publishes two answers on the same page. Its bullets claim up to 50 miles on throttle and 75 with pedal assist; its FAQ, further down that page, says 30 and 50. We print both because both are the manufacturer's. The pack is 48V x 20Ah, about 960 Wh — the same energy as the K20 — so the honest expectation is K20-like range, adjusted for however you ride.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the K16's top speed?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY prints \"28+++ mph\" in pure electric mode on a full charge. That is a manufacturer figure, not a measured one. On 16-inch wheels the same motor produces more torque at the rim and a lower top gear, so treat the number as the ceiling of what the controller allows rather than what you will hold on flat road.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a 1500W electric bike street legal?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eIt depends on your state. 15 U.S.C. 2085(b) defines a \"low-speed electric bicycle\" as having \"an electric motor of less than 750 watts (1 h.p.)\" and a motor-only top speed under 20 mph for a 170 lb rider. YVY rates this motor at 1500W, so its own figure sits outside that federal definition, and many states then treat such a vehicle under moped or off-highway rules. Check your state's rules before riding on a road or bike path.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat height and weight does the K16 fit?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's FAQ recommends a rider height of 5 ft 2 in to 6 ft 0 in for this model — the lowest starting height in its range — with a maximum load capacity of 330 lb. That load figure covers rider and cargo together.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eAre 16-inch wheels worse than 20-inch on rough ground?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eGenerally yes, and it is geometry rather than opinion: a smaller wheel meets an edge or a pothole at a steeper angle, so it drops into gaps a larger wheel rolls across. The 4.0-inch tire width offsets some of that by cushioning impacts, which is why this is still a capable bike on gravel and packed dirt. If most of your riding is broken trail at speed, the 20-inch K20 is the better tool.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow long does the K16 take to charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY states 4 to 6 hours at 3A — the only charging spec in its range that names an amperage rather than just hours. The pack is removable, so it can charge indoors away from the bike.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy does the URL say Q16 when the bike is called K16?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eWe do not know, and we are not going to invent a reason. YVY's own product URL contains q16 while the page title and the body copy both say K16. We list it as the K16, the name printed on the page, and flag the mismatch here rather than quietly picking one.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/yvy\"\u003eEvery YVY at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20\"\u003eCompare the K20\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-lite\"\u003eCompare the K20 Lite\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-pro\"\u003eCompare the K20 Pro\u003c\/a\u003e  ·  \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eE-bike laws in your state\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003col class=\"sb-bib\"\u003e\n\u003cli\u003eYVY product page: YVY K16 1500W Fat Tire Electric Bike, 16-Inch Wheels \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-q16-1500w-fat-tire-electric-bicycle\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Ebike Warranty \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/ebike-warranty\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Company Address page \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/company-address\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Shipping Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/shipping-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Return \u0026amp; Refund Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/return-refund-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e15 U.S.C. § 2085, Low-speed electric bicycles \u003cspan class=\"sb-addr\"\u003euscode.house.gov — 15 U.S.C. § 2085\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eRedtail's state-by-state e-bike law guide\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications and prices are YVY's own, reproduced as published from the archived copy of its product page, with contradictions in its copy flagged rather than resolved silently. The federal definition is quoted from the statute itself and was retrieved twice, independently, from the U.S. Government Publishing Office and Cornell's Legal Information Institute. Warranty terms are YVY's; shipping and return terms on this page are Redtail's. Manufacturer sources are cited by name and address rather than linked, because every link on this page should keep you here. Want to see any source we used? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll send it.\u003c\/p\u003e\n\u003cp class=\"sb-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from an archived copy of YVY's own product page (\u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-q16-1500w-fat-tire-electric-bicycle\u003c\/span\u003e), retrieved 2026-08-25, with the price cross-checked the same day against a second, independently fetched YVY endpoint. Figures are the manufacturer's ratings, not our test results; where YVY's page disagrees with itself, or leaves a specification out, the “How to read this spec sheet” section names it and says what we did. The federal definition is quoted from the statute and was retrieved from two independent publishers. Prices are USD, matched to YVY's own storefront, current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"YVY","offers":[{"title":"Default Title","offer_id":53819658502427,"sku":null,"price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/2_ad031295-5164-4050-92a5-29c94a7fcb00.jpg?v=1787706625"},{"product_id":"yvy-k20","title":"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style","description":"\u003cdiv class=\"sb-flow\"\u003e\n\u003cstyle\u003e\n.sb-flow{--sb-ink:#111;--sb-sub:#555;--sb-line:#e8e8e8;--sb-accent:#c8102e;--sb-good:#0a7d3f;--sb-warn:#b3261e;font-family:inherit;color:var(--sb-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.sb-flow *{box-sizing:border-box;}\n.sb-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.sb-flow 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p{font-size:1.08rem;color:var(--sb-sub);margin:0;max-width:52ch;}\n.sb-feat__kicker{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-accent);margin-bottom:.6rem;}\n.sb-feat:nth-of-type(even) .sb-feat__media{order:2;}\n.sb-ledger{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0 0;}\n.sb-ledger\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.4rem 1.6rem;}\n.sb-ledger h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;}\n.sb-ledger--good h3{color:var(--sb-good);}\n.sb-ledger--bad h3{color:var(--sb-warn);}\n.sb-ledger ul{margin:.6rem 0 0;padding-left:1.1rem;}\n.sb-ledger li{margin:.5rem 0;color:var(--sb-sub);}\n.sb-tablewrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--sb-line);border-radius:18px;margin:1rem 0 0;}\n.sb-tablewrap table{width:100%;border-collapse:collapse;min-width:400px;}\n.sb-tablewrap th,.sb-tablewrap td{padding:.85rem 1.2rem;border-bottom:1px solid var(--sb-line);text-align:left;font-size:.97rem;vertical-align:top;}\n.sb-tablewrap thead th{background:#fafafa;font-weight:700;}\n.sb-tablewrap tr:last-child td{border-bottom:0;}\n.sb-tablewrap td:first-child,.sb-tablewrap th:first-child{font-weight:600;}\n.sb-src{font-size:.85rem;color:var(--sb-sub);margin:.7rem 0 0;}\n.sb-src a{color:var(--sb-sub);}\n.sb-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1rem 0 0;}\n.sb-cards\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.3rem 1.5rem;}\n.sb-cards h3{font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--sb-accent);}\n.sb-cards p,.sb-cards li{color:var(--sb-sub);font-size:.95rem;}\n.sb-cards ul{margin:.5rem 0 0;padding-left:1.1rem;}\n.sb-faq{margin:1rem 0 0;border:1px solid var(--sb-line);border-radius:18px;overflow:hidden;}\n.sb-faq details{border-bottom:1px solid var(--sb-line);}\n.sb-faq details:last-child{border-bottom:0;}\n.sb-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.sb-faq .sb-a{padding:0 1.5rem 1.2rem;color:var(--sb-sub);margin:0;}\n.sb-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--sb-line);border-radius:14px;font-size:.9rem;color:var(--sb-sub);}\n.sb-hero{width:100%;border-radius:20px;overflow:hidden;margin:0 0 .6rem;position:relative;}\n.sb-hero img{width:100%;height:auto;display:block;}\n.sb-cap{font-size:.86rem;color:var(--sb-sub);margin:0 0 2rem;padding-left:.2rem;font-style:italic;}\n.sb-bib{margin:1rem 0 0;padding-left:1.4rem;}\n.sb-bib li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;color:var(--sb-sub);}\n.sb-cite{font-weight:600;color:var(--sb-ink);}\n.sb-measured{margin:2rem auto;padding:1.4rem 1.6rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-good);border-radius:14px;background:#fbfdfb;}\n.sb-measured h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-good);margin:0 0 .5rem;}\n.sb-measured p{margin:0;color:var(--sb-ink);}\n.sb-measured .sb-src{margin-top:.6rem;}\n.sb-notes{margin:1rem 0 0;padding:1.2rem 1.5rem;border:1px solid var(--sb-line);border-radius:16px;}\n.sb-notes li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-law{margin:1rem 0 0;padding:1.4rem 1.7rem;border:1px solid var(--sb-line);border-left:4px solid #444;border-radius:14px;background:#fafafa;}\n.sb-law blockquote{margin:.8rem 0;padding-left:1rem;border-left:3px solid #ccc;font-style:italic;color:var(--sb-ink);}\n.sb-law p{margin:.6rem 0;color:var(--sb-sub);}\n.sb-law .sb-stat{font-weight:700;color:var(--sb-ink);}\n@media(max-width:800px){.sb-feat,.sb-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.sb-feat:nth-of-type(even) .sb-feat__media{order:0;}.sb-feat__txt h3{font-size:1.6rem;}.sb-ledger,.sb-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"sb-hero\"\u003e\u003cimg loading=\"eager\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/1_4a688945-f109-4fe2-82d8-7ced8789b0dd.jpg?v=1787706557\" alt=\"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cp class=\"sb-cap\"\u003eThe K20 is the middle of YVY's three-bike moto line: the Lite's frame and stance, with a 1500W motor and hydraulic brakes instead of mechanical ones.\u003c\/p\u003e\n\u003cdiv class=\"sb-answer\"\u003e\n\u003cspan class=\"sb-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThe K20 is YVY's mid-range moto-style fat-tire e-bike: a 1500W rear hub motor, a removable 48V 20Ah battery, 20x4.0 tires and hydraulic dual brakes, for $769. YVY rates it to 50 miles on throttle and 75 with pedal assist, and caps total load at 330 lb.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"sb-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003e1500W\u003c\/b\u003e\u003cspan\u003eMotor, as rated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e960Wh\u003c\/b\u003e\u003cspan\u003e48V x 20Ah battery\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e50 \/ 75 mi\u003c\/b\u003e\u003cspan\u003eThrottle \/ pedal-assist\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e330 lb\u003c\/b\u003e\u003cspan\u003eMaximum load\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e20 x 4.0 in\u003c\/b\u003e\u003cspan\u003eFat tires\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho the K20 is for\u003c\/h2\u003e\n\u003cdiv class=\"sb-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRiders who want the moto silhouette — banana seat, headlight nacelle, battery in the triangle — without stepping up to the dual-battery Pro\u003c\/li\u003e\n\u003cli\u003eShort, load-heavy trips: 960Wh is a lot of battery for a $769 bike, and the 330 lb ceiling leaves real room for a rider plus cargo\u003c\/li\u003e\n\u003cli\u003eMixed surfaces. The 20 x 4.0 tires and front-and-rear suspension are the reason to pick this over a rigid commuter\u003c\/li\u003e\n\u003cli\u003eAnyone who would rather have hydraulic brakes than the mechanical discs on the cheaper K20 Lite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou need a bike that meets the federal low-speed electric bicycle definition — YVY rates this motor at 1500W, and that definition stops at 750W (see the legal note below)\u003c\/li\u003e\n\u003cli\u003eYou want a published curb weight before you buy: YVY does not state one anywhere on this listing\u003c\/li\u003e\n\u003cli\u003eYou need a documented UL 2849 or UL 2271 certification — YVY publishes neither for this bike. The EN 15194 test report it links sitewide covers a different model (FM-002\/CDDA20, a cargo e-bike)\u003c\/li\u003e\n\u003cli\u003eYou want a torque-sensing assist. This is a cadence-and-throttle bike, and YVY does not claim otherwise\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/3_7d20af67-a93d-4d20-b4ba-effa2b95623d.jpg?v=1787706563\" alt=\"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style — 1500W, and the number matters legally\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eMotor\u003c\/span\u003e\u003ch3\u003e1500W, and the number matters legally\u003c\/h3\u003e\n\u003cp\u003eYVY rates the rear hub at 1500W with 85 N·m of torque and a 35-degree climbing claim. That is a lot of motor for $769, and it is also the figure that puts this bike outside the federal low-speed electric bicycle definition, which stops at 750W. Both facts are true at once, and the section below quotes the statute so you can check your own state's rules before you ride.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/4_fa880283-1d4d-4e81-be34-c69208228e91.jpg?v=1787706566\" alt=\"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style — 960Wh, and it comes off the frame\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003e960Wh, and it comes off the frame\u003c\/h3\u003e\n\u003cp\u003eThe 48V 20Ah pack works out to 960 watt-hours — our arithmetic, from YVY's own volts and amp-hours. It is removable, so it charges at a desk instead of wherever the bike is parked, and YVY quotes about 4 to 6 hours for a full charge. Replacement packs for this model are sold separately at 48V 20Ah.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/5_2c5f8e94-559e-43fe-a650-0fc641f614ef.jpg?v=1787706569\" alt=\"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style — Hydraulic, front and rear\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBrakes\u003c\/span\u003e\u003ch3\u003eHydraulic, front and rear\u003c\/h3\u003e\n\u003cp\u003eThis is the clearest hardware line between the K20 and the cheaper K20 Lite, which uses mechanical discs. YVY claims hydraulic dual brakes cut average stopping distance by half against mechanical ones. Treat the percentage as a manufacturer claim; treat the hardware difference as real, because it is specified on the page.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/6_bbd38b52-a13b-49d8-90c0-99e44c2a74a4.jpg?v=1787706572\" alt=\"YVY K20 Fat Tire Electric Bike, 1500W Moto-Style — 5 ft 4 in to 6 ft 2 in, 330 lb all-in\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eFit\u003c\/span\u003e\u003ch3\u003e5 ft 4 in to 6 ft 2 in, 330 lb all-in\u003c\/h3\u003e\n\u003cp\u003eYVY's own FAQ gives a recommended rider height of 5.4 to 6.2 feet and a maximum load of 330 lb. That ceiling is total — rider, clothing, pack and anything strapped to the rear rack — so subtract your cargo before you compare it against your own weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eWhere this bike sits in US law\u003c\/h2\u003e\n\u003cdiv class=\"sb-law\"\u003e\n\u003cp\u003eBikes in this power class raise one question before any other, so here is the statute rather than a summary of it. Federal law defines the category this way:\u003c\/p\u003e\n\u003cblockquote\u003ethe term “low-speed electric bicycle” means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.\u003c\/blockquote\u003e\n\u003cp class=\"sb-src\"\u003e15 U.S.C. § 2085(b) (Pub. L. 107–319, § 1, Dec. 4, 2002, 116 Stat. 2776). Retrieved 2026-08-25 from the U.S. Government Publishing Office and confirmed word for word against Cornell's Legal Information Institute the same day.\u003c\/p\u003e\n\u003cp\u003eYVY publishes this bike's motor as \u003cspan class=\"sb-stat\"\u003e1500W brushless rear hub (YVY's rating)\u003c\/span\u003e and its top speed as \u003cspan class=\"sb-stat\"\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/span\u003e. Set those figures against the threshold above and you can see for yourself that the manufacturer's own numbers fall outside the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003cp\u003eWhat that means in practice is decided by your state, not by us. Many states apply moped, motor-driven cycle or off-highway vehicle rules to machines above the federal threshold, and those rules can reach registration, insurance, licensing, helmet requirements and which paths and trails you may use. Some states set their own wattage ceilings that differ from the federal one. We cannot tell you how your state treats this bike, and we are not going to guess: check before you ride on any public road, bike path or trail.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eStart here: \u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e. Current as of 2026-08-25; state law changes, so re-check yours before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"sb-ledger\"\u003e\n\u003cdiv class=\"sb-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe battery is genuinely large for the money: 48V x 20Ah is 960Wh, which is more pack than most sub-$800 fat-tire bikes carry\u003c\/li\u003e\n\u003cli\u003eHydraulic dual brakes are specified, not mechanical — the step up from the K20 Lite is a real hardware difference, not a trim name\u003c\/li\u003e\n\u003cli\u003eFront fork and rear shock are both specified, so the fat tires are not doing all of the suspension work\u003c\/li\u003e\n\u003cli\u003eThis model's range claims are internally consistent: the bullets and the FAQ on YVY's page both say 50 miles throttle and 75 miles pedal-assist, which is not true of every bike in this range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo published weight. YVY states no curb weight for this bike anywhere on the listing, and a 960Wh moto-style frame is not a light object to carry up steps\u003c\/li\u003e\n\u003cli\u003e\"IP5 waterproof\" is not a complete IP rating — a full code carries two digits (IP55) or an X placeholder (IPX5). We reproduce what YVY printed rather than guessing which one it meant\u003c\/li\u003e\n\u003cli\u003eCertification does not cover this bike. YVY links an EN 15194:2017 test report from every page, but that report names model FM-002\/CDDA20, a cargo electric bicycle, and no UL 2849 or UL 2271 certification is published for anything in the range\u003c\/li\u003e\n\u003cli\u003eThe same company sells this bike at $769 here and at $1,117.95 on its Ridstar storefront the same day. Ours is the yvyebike.com price\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the K20 compares\u003c\/h2\u003e\n\u003cp class=\"sb-src\"\u003eAll figures are YVY's own published specs, read from each model's archived product page on 2026-08-25. A dash means YVY publishes no figure for that model.\u003c\/p\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eK20\u003c\/th\u003e\n\u003cth\u003eK20 Lite\u003c\/th\u003e\n\u003cth\u003eK20 Pro\u003c\/th\u003e\n\u003cth\u003eK16\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$769\u003c\/td\u003e\n\u003ctd\u003e$659\u003c\/td\u003e\n\u003ctd\u003e$1,399\u003c\/td\u003e\n\u003ctd\u003e$749\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY\u003c\/td\u003e\n\u003ctd\u003e1500W brushless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e749 Wh\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange (claimed)\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eMechanical disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e16 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSource: each model's page on yvyebike.com, archived 2026-08-25. — = not published by YVY for that model.\u003c\/p\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub (YVY's rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque\u003c\/td\u003e\n\u003ctd\u003e85 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e960 Wh (our arithmetic: 48V x 20Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging time\u003c\/td\u003e\n\u003ctd\u003eAbout 4-6 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle-only range\u003c\/td\u003e\n\u003ctd\u003eUp to 50 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedal-assist range\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuspension\u003c\/td\u003e\n\u003ctd\u003eFront fork and rear shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003e7-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiding modes\u003c\/td\u003e\n\u003ctd\u003ePure electric, pedal assist, pedal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eMulti-function LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClimb rating\u003c\/td\u003e\n\u003ctd\u003eUp to 35 degrees, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater resistance\u003c\/td\u003e\n\u003ctd\u003e\"IP5\", as printed by YVY (not a complete IP code)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended rider height\u003c\/td\u003e\n\u003ctd\u003e5 ft 4 in - 6 ft 2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting\u003c\/td\u003e\n\u003ctd\u003eLED headlight and tail light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003e7.2 in phone holder, storage box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003e90% pre-assembled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eNo UL 2849 or UL 2271 certification published. YVY links an EN 15194:2017 test report sitewide, but it covers model FM-002\/CDDA20, a cargo e-bike — not this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (motor, battery, charger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications as published by YVY at \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-fat-tire-electric-bicycle\u003c\/span\u003e, archived 2026-08-25. YVY publishes no specification table for any of its bikes, so every figure above was read out of the copy on that page and the sentence behind each one is on file. Watt-hour totals are our arithmetic and are marked as such. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to read this spec sheet\u003c\/h2\u003e\n\u003cp\u003eManufacturer pages contain marketing, and marketing sometimes disagrees with the marketing an inch below it. Rather than quietly pick numbers, here is every place YVY's own page disagrees with itself for this model, every figure it leaves out, and what we did about each:\u003c\/p\u003e\n\u003cdiv class=\"sb-notes\"\u003e\u003cul\u003e\n\u003cli\u003eYVY publishes no specification table for any of its bikes. Every figure above was read out of the marketing copy on its own product page, and the exact sentence behind each one is recorded in research\/yvy\/specs_20260825.json.\u003c\/li\u003e\n\u003cli\u003eTop speed is printed on YVY's page as \"28+++ mph\". We render it as \"28+ mph\" for legibility and quote the original here rather than rounding it into a number YVY did not write.\u003c\/li\u003e\n\u003cli\u003e\"IP5 waterproof\" is reproduced exactly as printed. A complete IP code needs two digits or an X placeholder, so we cannot tell whether IP55 or IPX5 was intended, and we do not guess.\u003c\/li\u003e\n\u003cli\u003eBattery energy in watt-hours is ours, not YVY's: 48 volts x 20 amp-hours = 960 Wh. The multiplication is shown so you can check it.\u003c\/li\u003e\n\u003cli\u003eThis bike is listed twice on YVY's own storefront — at $769 with the SKU and the full image set, and at $799 on a second listing whose description is byte-for-byte identical. We price against the first. A third listing at $1,299 carries different photography of the same bike.\u003c\/li\u003e\n\u003cli\u003eYVY links two PDFs from every page: an EN 15194:2017 test report (report ATS240329142LR, issued 2 April 2024 by Shenzhen ATS Testing Technology, for model FM-002\/CDDA20, a cargo electric bicycle) and the EUIPO trade mark certificate for \"Ridstar\". Neither covers this model. We say so rather than let a sitewide certificate imply cover it does not give.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-measured\"\u003e\n\u003ch3\u003eWhat we counted\u003c\/h3\u003e\n\u003cp\u003eWe pulled YVY's entire live catalogue on 2026-08-25 — all \u003cstrong\u003e46 published listings\u003c\/strong\u003e — and worked out what is actually on sale. Of \u003cstrong\u003e13 bike listings, only 7 are distinct bikes\u003c\/strong\u003e: 6 are the same machines listed a second time, which we proved from byte-identical descriptions, shared image files and, in three cases, by opening the photographs. Six of the thirteen bike listings are the same bikes listed twice — proven by byte-identical descriptions, shared image files, and in three cases by opening the photographs. The duplicates are priced $30–$550 above the merchandised listing of the same bike. We list one page per bike, priced against the listing YVY actually merchandises.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eRedtail original analysis, counted from YVY's public storefront feed and collection endpoints on 2026-08-25; every price cross-checked against a second, independently fetched endpoint (46 of 46 listings agree across two independently fetched endpoints). Availability moves; email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e for anything not shown here.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame and other components\u003c\/td\u003e\n\u003ctd\u003eNot separately stated in YVY's published warranty terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInbound and outbound repair shipping\u003c\/td\u003e\n\u003ctd\u003eCovered by YVY inside the warranty period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eDefects in hardware or firmware under regular use during the warranty period. YVY states it will repair or replace, at no charge, a product or part that proves defective because of hardware malfunction under regular use and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep proof of purchase — YVY excludes claims with no associated purchasing proof, invoice or receipt\u003c\/li\u003e\n\u003cli\u003eReport the fault inside the 1-year window; YVY dates coverage from receipt or purchase, whichever is later\u003c\/li\u003e\n\u003cli\u003eKeep the original packaging for a period after delivery, which YVY asks for directly in its product listings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConditions, malfunctions or damage not resulting from defects in hardware or firmware\u003c\/li\u003e\n\u003cli\u003eClaims with no purchase proof, invoice or receipt, and no authorised dealer confirmation\u003c\/li\u003e\n\u003cli\u003eReturn shipping when the product is found to have no quality issue, or is confirmed working by YVY's after-sales engineers\u003c\/li\u003e\n\u003cli\u003eFaults reported after the warranty period, which YVY offers to resolve at material cost instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eYVY Limited Warranty issued by YVY Bikes, as published on its \u003cspan class=\"sb-cite\"\u003ewarranty page\u003c\/span\u003e. One caveat worth knowing: that page lists its “Warranted Products” as the Q20, Upgraded Q20 and Q20Pro — model names that do not appear on YVY's current storefront. The 1-year motor, battery and charger term above is therefore taken from this bike's own product listing, which states it directly. File with Redtail, not with the manufacturer: we are the merchant of record on this order and we open and carry the warranty claim on your behalf.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.\u003c\/p\u003e\n\u003cp\u003eShips via trusted parcel and freight carriers — UPS, FedEx, and LTL freight for larger items — with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours; claims submitted after this window are not accepted.\u003c\/p\u003e\n\u003cp\u003eBikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours (3 days) of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e · \u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. YVY publishes its own \u003cspan class=\"sb-cite\"\u003eshipping\u003c\/span\u003e and \u003cspan class=\"sb-cite\"\u003ereturn\u003c\/span\u003e terms, which apply to orders placed directly with YVY, not to orders placed here.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"sb-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhat is the YVY K20's top speed?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY prints \"28+++ mph\" in pure electric mode on a full charge. That is the manufacturer's figure, not a measured one, and the plus signs are theirs. Actual speed depends on rider weight, terrain, tire pressure and state of charge — and on whatever speed limit applies where you ride.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow far can the K20 actually go on one charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY claims up to 50 miles on throttle alone and up to 75 miles with pedal assist, and its bullets and FAQ agree on both numbers. Manufacturer range figures are best-case: they assume a light rider, flat ground, low assist and no wind. Plan on materially less in hills or cold, and treat the 960Wh pack rather than the mileage claim as the honest measure of how much energy you are carrying.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a 1500W electric bike street legal?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eIt depends entirely on your state, and the federal definition is the place to start. 15 U.S.C. 2085(b) defines a \"low-speed electric bicycle\" as having \"an electric motor of less than 750 watts (1 h.p.)\" and a motor-only top speed under 20 mph for a 170 lb rider. YVY rates this motor at 1500W, so the manufacturer's own figure sits outside that definition, and many states then treat such a vehicle under moped or off-highway rules instead. Check your state before you ride on a road or a bike path — we cannot answer it for your jurisdiction.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat height and weight does the K20 fit?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's own FAQ recommends a rider height of 5 ft 4 in to 6 ft 2 in and states a maximum load capacity of 330 lb. That figure is the total the bike is rated to carry, so count yourself plus anything you are carrying, not just yourself.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat battery does the K20 use, and can I buy a spare?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eA removable 48V 20Ah lithium-ion pack, which is 960 Wh. YVY sells replacement packs for this model line separately, listing the K20 variant as a 48V 20Ah lithium battery. A second pack is the only real way to extend range on a ride, because charging takes about 4 to 6 hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow long does the K20 take to charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY states about 4 to 6 hours for a full charge. Because the pack is removable, you can charge it away from the bike, which matters if the bike lives in a garage or a hallway and the outlet does not.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy does the K20 have fat tires?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eThe 20 x 4.0 in tires run at lower pressure than a standard tire, which spreads the bike's contact patch and adds grip on sand, gravel, snow and broken pavement. They also absorb small impacts, which is why fat-tire bikes feel calmer on bad surfaces. The trade is rolling resistance and weight: fat tires cost you some efficiency on smooth tarmac.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWho makes YVY?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's own company-address page names the business behind the brand as HK Ridstar Trade Limited, and its warranty page routes service verification through Ridstar. Ridstar's own storefront also lists a YVY collection carrying the K20, K20 Pro and K20 Lite. We state that because it is on their pages; it is a sourcing fact, not a recommendation.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/yvy\"\u003eEvery YVY at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-lite\"\u003eCompare the K20 Lite\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-pro\"\u003eCompare the K20 Pro\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k16\"\u003eCompare the K16\u003c\/a\u003e  ·  \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eE-bike laws in your state\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003col class=\"sb-bib\"\u003e\n\u003cli\u003eYVY product page: YVY K20 Fat Tire Electric Bike, 1500W Moto-Style \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-fat-tire-electric-bicycle\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Ebike Warranty \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/ebike-warranty\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Company Address page \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/company-address\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Shipping Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/shipping-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Return \u0026amp; Refund Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/return-refund-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e15 U.S.C. § 2085, Low-speed electric bicycles \u003cspan class=\"sb-addr\"\u003euscode.house.gov — 15 U.S.C. § 2085\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eRedtail's state-by-state e-bike law guide\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications and prices are YVY's own, reproduced as published from the archived copy of its product page, with contradictions in its copy flagged rather than resolved silently. The federal definition is quoted from the statute itself and was retrieved twice, independently, from the U.S. Government Publishing Office and Cornell's Legal Information Institute. Warranty terms are YVY's; shipping and return terms on this page are Redtail's. Manufacturer sources are cited by name and address rather than linked, because every link on this page should keep you here. Want to see any source we used? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll send it.\u003c\/p\u003e\n\u003cp class=\"sb-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from an archived copy of YVY's own product page (\u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-fat-tire-electric-bicycle\u003c\/span\u003e), retrieved 2026-08-25, with the price cross-checked the same day against a second, independently fetched YVY endpoint. Figures are the manufacturer's ratings, not our test results; where YVY's page disagrees with itself, or leaves a specification out, the “How to read this spec sheet” section names it and says what we did. The federal definition is quoted from the statute and was retrieved from two independent publishers. Prices are USD, matched to YVY's own storefront, current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"YVY","offers":[{"title":"Default Title","offer_id":53819658633499,"sku":"K20","price":769.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/1_4a688945-f109-4fe2-82d8-7ced8789b0dd.jpg?v=1787706557"},{"product_id":"yvy-k20-25ah","title":"YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension","description":"\u003cdiv class=\"sb-flow\"\u003e\n\u003cstyle\u003e\n.sb-flow{--sb-ink:#111;--sb-sub:#555;--sb-line:#e8e8e8;--sb-accent:#c8102e;--sb-good:#0a7d3f;--sb-warn:#b3261e;font-family:inherit;color:var(--sb-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.sb-flow *{box-sizing:border-box;}\n.sb-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.sb-flow 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details:last-child{border-bottom:0;}\n.sb-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.sb-faq .sb-a{padding:0 1.5rem 1.2rem;color:var(--sb-sub);margin:0;}\n.sb-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--sb-line);border-radius:14px;font-size:.9rem;color:var(--sb-sub);}\n.sb-hero{width:100%;border-radius:20px;overflow:hidden;margin:0 0 .6rem;position:relative;}\n.sb-hero img{width:100%;height:auto;display:block;}\n.sb-cap{font-size:.86rem;color:var(--sb-sub);margin:0 0 2rem;padding-left:.2rem;font-style:italic;}\n.sb-bib{margin:1rem 0 0;padding-left:1.4rem;}\n.sb-bib li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;color:var(--sb-sub);}\n.sb-cite{font-weight:600;color:var(--sb-ink);}\n.sb-measured{margin:2rem auto;padding:1.4rem 1.6rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-good);border-radius:14px;background:#fbfdfb;}\n.sb-measured h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-good);margin:0 0 .5rem;}\n.sb-measured p{margin:0;color:var(--sb-ink);}\n.sb-measured .sb-src{margin-top:.6rem;}\n.sb-notes{margin:1rem 0 0;padding:1.2rem 1.5rem;border:1px solid var(--sb-line);border-radius:16px;}\n.sb-notes li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-law{margin:1rem 0 0;padding:1.4rem 1.7rem;border:1px solid var(--sb-line);border-left:4px solid #444;border-radius:14px;background:#fafafa;}\n.sb-law blockquote{margin:.8rem 0;padding-left:1rem;border-left:3px solid #ccc;font-style:italic;color:var(--sb-ink);}\n.sb-law p{margin:.6rem 0;color:var(--sb-sub);}\n.sb-law .sb-stat{font-weight:700;color:var(--sb-ink);}\n@media(max-width:800px){.sb-feat,.sb-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.sb-feat:nth-of-type(even) .sb-feat__media{order:0;}.sb-feat__txt h3{font-size:1.6rem;}.sb-ledger,.sb-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"sb-hero\"\u003e\u003cimg loading=\"eager\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzYcgqm6KhpPW6yuwXP0U0MI.png?v=1787706644\" alt=\"YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cp class=\"sb-cap\"\u003eThe largest single battery YVY fits: 48V 25Ah, or 1,200Wh, against the standard K20's 960Wh.\u003c\/p\u003e\n\u003cdiv class=\"sb-answer\"\u003e\n\u003cspan class=\"sb-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThe K20 25Ah is the big-battery single-pack bike in YVY's range at $1,349: a peak 2000W motor, 90 N·m of torque and a 48V 25Ah battery worth 1,200Wh, with full suspension and a 7-speed drivetrain. YVY claims 45 to 90 miles per charge. It is also the thinnest spec sheet they publish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"sb-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003ePeak 2000W\u003c\/b\u003e\u003cspan\u003eMotor, as rated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e1,200Wh\u003c\/b\u003e\u003cspan\u003e48V x 25Ah battery\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e90 N·m\u003c\/b\u003e\u003cspan\u003eTorque\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e45-90 mi\u003c\/b\u003e\u003cspan\u003eRange, claimed\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e28 mph\u003c\/b\u003e\u003cspan\u003eTop speed, claimed\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho the K20 25Ah is for\u003c\/h2\u003e\n\u003cdiv class=\"sb-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRange without the Pro's price or complexity — 1,200Wh in one pack is 25% more energy than the standard K20 carries\u003c\/li\u003e\n\u003cli\u003eClimbing. YVY rates this one at 90 N·m and a 40-degree gradient, the strongest claims in its range on both counts\u003c\/li\u003e\n\u003cli\u003eRiders who would rather manage one large battery than two smaller ones\u003c\/li\u003e\n\u003cli\u003eAnyone who wants the most motor YVY publishes on a single-motor bike\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou want a complete spec sheet before buying. This listing does not publish tire size, brake type, rider height range or charging time, and we have left all four blank rather than borrow them\u003c\/li\u003e\n\u003cli\u003eYou need a bike inside the federal low-speed electric bicycle definition — a peak 2000W rating is nowhere near the 750W ceiling\u003c\/li\u003e\n\u003cli\u003eYou want photographs of detail. YVY publishes three images for this bike against eight and ten for the cheaper K20 and K20 Lite\u003c\/li\u003e\n\u003cli\u003eYou want a published weight, or a UL 2849 \/ UL 2271 certification — YVY publishes neither for any bike in this range, and the EN 15194 report it links covers a different model\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzZY6HE4JblJCoHSVmJHrcL5.png?v=1787706652\" alt=\"YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension — 1,200Wh — the biggest single pack in the range\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003e1,200Wh — the biggest single pack in the range\u003c\/h3\u003e\n\u003cp\u003e48 volts by 25 amp-hours is 1,200 watt-hours, our arithmetic from YVY's own figures. That is 25% more energy than the standard K20's 960 Wh and, unlike the K20 Pro's 2,080 Wh, it arrives in one removable pack rather than two. If your objection to the Pro is that it is two batteries to track, charge and eventually replace, this is the alternative YVY offers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzYlQkZFCidBIL8fkDr2_o5g.png?v=1787706649\" alt='YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension — Peak 2000W, 90 N·m — and what \"peak\" leaves out' width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eMotor\u003c\/span\u003e\u003ch3\u003ePeak 2000W, 90 N·m — and what \"peak\" leaves out\u003c\/h3\u003e\n\u003cp\u003eYVY rates this one at a peak 2000W producing 90 N·m, and claims it climbs 40-degree slopes. Those are the strongest numbers in their range. But peak wattage is a burst figure, not what the motor sustains, and YVY publishes no continuous rating to put beside it. A peak-2000W motor and a continuous-2000W motor are very different machines, and this page does not tell you which one this is.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzYlQkZFCidBIL8fkDr2_o5g.png?v=1787706649\" alt=\"YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension — 45 to 90 miles, and a rare honest span\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eRange\u003c\/span\u003e\u003ch3\u003e45 to 90 miles, and a rare honest span\u003c\/h3\u003e\n\u003cp\u003eYVY states this bike travels 45 to 90 miles on a single charge. That is worth noting because it is a range rather than a single best-case number — most listings in this catalogue quote only the top figure. A span at least admits that conditions decide the outcome. Expect the low end in hills, cold or heavy throttle use, and the high end only with low assist on flat ground.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzYlQkZFCidBIL8fkDr2_o5g.png?v=1787706649\" alt=\"YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension — Four rows YVY does not fill\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eWhat is missing\u003c\/span\u003e\u003ch3\u003eFour rows YVY does not fill\u003c\/h3\u003e\n\u003cp\u003eThis listing publishes no tire size, no brake type, no recommended rider height and no charging time. The obvious move would be to copy them from the K20, which shares the model name — and we have not, because YVY has not said these bikes share those parts. Every one of those rows reads \"not published by YVY\" in the table below. If any of them decides your purchase, ask us before you order and we will put the question to the supplier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eWhere this bike sits in US law\u003c\/h2\u003e\n\u003cdiv class=\"sb-law\"\u003e\n\u003cp\u003eBikes in this power class raise one question before any other, so here is the statute rather than a summary of it. Federal law defines the category this way:\u003c\/p\u003e\n\u003cblockquote\u003ethe term “low-speed electric bicycle” means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.\u003c\/blockquote\u003e\n\u003cp class=\"sb-src\"\u003e15 U.S.C. § 2085(b) (Pub. L. 107–319, § 1, Dec. 4, 2002, 116 Stat. 2776). Retrieved 2026-08-25 from the U.S. Government Publishing Office and confirmed word for word against Cornell's Legal Information Institute the same day.\u003c\/p\u003e\n\u003cp\u003eYVY publishes this bike's motor as \u003cspan class=\"sb-stat\"\u003ePeak 2000W brushless (YVY's rating — no continuous figure published)\u003c\/span\u003e and its top speed as \u003cspan class=\"sb-stat\"\u003e28 mph, claimed\u003c\/span\u003e. Set those figures against the threshold above and you can see for yourself that the manufacturer's own numbers fall outside the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003cp\u003eWhat that means in practice is decided by your state, not by us. Many states apply moped, motor-driven cycle or off-highway vehicle rules to machines above the federal threshold, and those rules can reach registration, insurance, licensing, helmet requirements and which paths and trails you may use. Some states set their own wattage ceilings that differ from the federal one. We cannot tell you how your state treats this bike, and we are not going to guess: check before you ride on any public road, bike path or trail.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eStart here: \u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e. Current as of 2026-08-25; state law changes, so re-check yours before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"sb-ledger\"\u003e\n\u003cdiv class=\"sb-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1,200Wh is the largest single pack YVY fits, and it is a real 25% step up in energy from the standard K20's 960Wh\u003c\/li\u003e\n\u003cli\u003e90 N·m of torque and a 40-degree climb claim are the highest figures YVY publishes for any of its bikes\u003c\/li\u003e\n\u003cli\u003eIts photography is YVY-branded, unlike two other listings in the catalogue whose product shots carry a different company's brand mark\u003c\/li\u003e\n\u003cli\u003eThe battery figure is stated consistently in both the title and the body — no contradiction on the number that matters most here\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis is the thinnest listing YVY publishes for a bike: about 670 characters of description, against roughly 8,600 for the K20. Four spec rows below say \"not published\" as a direct result\u003c\/li\u003e\n\u003cli\u003e\"Peak 2000W\" is a peak figure, not a continuous rating. Peak wattage is the least comparable number on any e-bike spec sheet, and YVY publishes no continuous figure to sit beside it\u003c\/li\u003e\n\u003cli\u003eCertification does not cover this bike. YVY links an EN 15194:2017 test report from every page, but that report names model FM-002\/CDDA20, a cargo electric bicycle, and no UL 2849 or UL 2271 certification is published for anything in the range\u003c\/li\u003e\n\u003cli\u003eIt carries no SKU and sits in none of YVY's own storefront collections, unlike the K20, K20 Lite, K20 Pro and K16 — so it is merchandised less confidently than the rest of the range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the K20 25Ah compares\u003c\/h2\u003e\n\u003cp class=\"sb-src\"\u003eAll figures are YVY's own published specs, read from each model's archived product page on 2026-08-25. A dash means YVY publishes no figure for that model — a situation this listing produces more often than the others.\u003c\/p\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eK20 25Ah\u003c\/th\u003e\n\u003cth\u003eK20\u003c\/th\u003e\n\u003cth\u003eK20 Pro\u003c\/th\u003e\n\u003cth\u003eK20 Lite\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,349\u003c\/td\u003e\n\u003ctd\u003e$769\u003c\/td\u003e\n\u003ctd\u003e$1,399\u003c\/td\u003e\n\u003ctd\u003e$659\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003ePeak 2000W brushless\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 25Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e1,200 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh\u003c\/td\u003e\n\u003ctd\u003e749 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28 mph, claimed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange (claimed)\u003c\/td\u003e\n\u003ctd\u003e45-90 miles per charge, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSource: each model's page on yvyebike.com, archived 2026-08-25. — = not published by YVY for that model.\u003c\/p\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003ePeak 2000W brushless (YVY's rating — no continuous figure published)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque\u003c\/td\u003e\n\u003ctd\u003e90 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 25Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e1,200 Wh (our arithmetic: 48V x 25Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28 mph, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e45-90 miles per charge, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003e7-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuspension\u003c\/td\u003e\n\u003ctd\u003eFull suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClimb rating\u003c\/td\u003e\n\u003ctd\u003eUp to 40 degrees, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended rider height\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging time\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY for this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eNo UL 2849 or UL 2271 certification published. YVY links an EN 15194:2017 test report sitewide, but it covers model FM-002\/CDDA20, a cargo e-bike — not this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (motor, battery, charger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications as published by YVY at \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-25ah-electric-bicycle\u003c\/span\u003e, archived 2026-08-25. YVY publishes no specification table for any of its bikes, so every figure above was read out of the copy on that page and the sentence behind each one is on file. Watt-hour totals are our arithmetic and are marked as such. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to read this spec sheet\u003c\/h2\u003e\n\u003cp\u003eManufacturer pages contain marketing, and marketing sometimes disagrees with the marketing an inch below it. Rather than quietly pick numbers, here is every place YVY's own page disagrees with itself for this model, every figure it leaves out, and what we did about each:\u003c\/p\u003e\n\u003cdiv class=\"sb-notes\"\u003e\u003cul\u003e\n\u003cli\u003eSix rows in the table above read \"not published by YVY\". That is the honest state of this listing, which runs to about 670 characters against roughly 8,600 for the K20. We did not fill those rows from the K20's page, because sharing part of a model name is not evidence of sharing parts.\u003c\/li\u003e\n\u003cli\u003e\"Peak 2000W\" is YVY's wording. Peak power is a burst rating and is not comparable to the continuous ratings used in most regulations or in most spec sheets. YVY publishes no continuous figure for this motor.\u003c\/li\u003e\n\u003cli\u003eBattery energy in watt-hours is our arithmetic: 48 volts x 25 amp-hours = 1,200 Wh.\u003c\/li\u003e\n\u003cli\u003eThe battery capacity is the one figure this page states twice — in the listing title and in the body text — and both agree at 48V 25Ah.\u003c\/li\u003e\n\u003cli\u003eUnlike the K20, K20 Lite, K20 Pro and K16, this listing carries no SKU and appears in none of YVY's storefront collections. It is published and buyable, but merchandised less prominently than the rest of the range.\u003c\/li\u003e\n\u003cli\u003eYVY publishes no specification table for any bike. Every figure here was read out of marketing prose, with the sentence behind each recorded in research\/yvy\/specs_20260825.json.\u003c\/li\u003e\n\u003cli\u003eYVY links two PDFs from every page: an EN 15194:2017 test report (report ATS240329142LR, issued 2 April 2024 by Shenzhen ATS Testing Technology, for model FM-002\/CDDA20, a cargo electric bicycle) and the EUIPO trade mark certificate for \"Ridstar\". Neither covers this model. We say so rather than let a sitewide certificate imply cover it does not give.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-measured\"\u003e\n\u003ch3\u003eWhat we counted\u003c\/h3\u003e\n\u003cp\u003eWe pulled YVY's entire live catalogue on 2026-08-25 — all \u003cstrong\u003e46 published listings\u003c\/strong\u003e — and worked out what is actually on sale. Of \u003cstrong\u003e13 bike listings, only 7 are distinct bikes\u003c\/strong\u003e: 6 are the same machines listed a second time, which we proved from byte-identical descriptions, shared image files and, in three cases, by opening the photographs. Six of the thirteen bike listings are the same bikes listed twice — proven by byte-identical descriptions, shared image files, and in three cases by opening the photographs. The duplicates are priced $30–$550 above the merchandised listing of the same bike. We list one page per bike, priced against the listing YVY actually merchandises.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eRedtail original analysis, counted from YVY's public storefront feed and collection endpoints on 2026-08-25; every price cross-checked against a second, independently fetched endpoint (46 of 46 listings agree across two independently fetched endpoints). Availability moves; email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e for anything not shown here.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame and other components\u003c\/td\u003e\n\u003ctd\u003eNot separately stated in YVY's published warranty terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInbound and outbound repair shipping\u003c\/td\u003e\n\u003ctd\u003eCovered by YVY inside the warranty period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eDefects in hardware or firmware under regular use during the warranty period. YVY states it will repair or replace, at no charge, a product or part that proves defective because of hardware malfunction under regular use and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep proof of purchase — YVY excludes claims with no associated purchasing proof, invoice or receipt\u003c\/li\u003e\n\u003cli\u003eReport the fault inside the 1-year window; YVY dates coverage from receipt or purchase, whichever is later\u003c\/li\u003e\n\u003cli\u003eKeep the original packaging for a period after delivery, which YVY asks for directly in its product listings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConditions, malfunctions or damage not resulting from defects in hardware or firmware\u003c\/li\u003e\n\u003cli\u003eClaims with no purchase proof, invoice or receipt, and no authorised dealer confirmation\u003c\/li\u003e\n\u003cli\u003eReturn shipping when the product is found to have no quality issue, or is confirmed working by YVY's after-sales engineers\u003c\/li\u003e\n\u003cli\u003eFaults reported after the warranty period, which YVY offers to resolve at material cost instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eYVY Limited Warranty issued by YVY Bikes, as published on its \u003cspan class=\"sb-cite\"\u003ewarranty page\u003c\/span\u003e. One caveat worth knowing: that page lists its “Warranted Products” as the Q20, Upgraded Q20 and Q20Pro — model names that do not appear on YVY's current storefront. The 1-year motor, battery and charger term above is therefore taken from this bike's own product listing, which states it directly. File with Redtail, not with the manufacturer: we are the merchant of record on this order and we open and carry the warranty claim on your behalf.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.\u003c\/p\u003e\n\u003cp\u003eShips via trusted parcel and freight carriers — UPS, FedEx, and LTL freight for larger items — with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours; claims submitted after this window are not accepted.\u003c\/p\u003e\n\u003cp\u003eBikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours (3 days) of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e · \u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. YVY publishes its own \u003cspan class=\"sb-cite\"\u003eshipping\u003c\/span\u003e and \u003cspan class=\"sb-cite\"\u003ereturn\u003c\/span\u003e terms, which apply to orders placed directly with YVY, not to orders placed here.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"sb-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eHow far can the YVY K20 25Ah actually go on one charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY claims 45 to 90 miles. It is one of the few listings in their catalogue that publishes a span rather than a single best-case figure, which is more honest about how much conditions matter. The energy on board is 48V x 25Ah, about 1,200 Wh — 25% more than the standard K20 — so under identical conditions expect roughly 25% more range than that bike gives you.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does \"peak 2000W\" actually mean?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eIt means the maximum the motor draws in a burst, not what it sustains. Continuous rating is the figure that describes how a motor behaves on a long climb, and it is the figure most regulations are written around — and YVY publishes no continuous rating for this bike. So \"peak 2000W\" tells you the ceiling and nothing about the floor. We flag it rather than repeat it as though it were a continuous spec.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a 2000W electric bike street legal?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eAlmost certainly not as a bicycle, and it is a state-by-state question. 15 U.S.C. 2085(b) defines a \"low-speed electric bicycle\" as having \"an electric motor of less than 750 watts (1 h.p.)\" and a motor-only top speed under 20 mph for a 170 lb rider. A peak 2000W motor rated to 28 mph is far outside that description, and states commonly apply moped or off-highway vehicle rules to such a machine. Check your own state's rules before riding on any road, path or trail.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tires and brakes does the K20 25Ah have?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY does not publish either for this model, and we have not copied them from the standard K20's page. Sharing a model name is not evidence of sharing hardware, and guessing on brakes is exactly the kind of specification a buyer should not have to unwind later. If it decides your purchase, email us and we will put the question to the supplier before you order.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the K20 25Ah compare to the K20 Pro?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eOne big battery against two. This bike carries 1,200 Wh in a single 48V 25Ah pack; the Pro carries 2,080 Wh across two 52V 20Ah packs and runs two motors instead of one. The Pro has 73% more energy and costs $50 more. This bike is the simpler machine — one pack to charge, one to replace — and publishes the higher torque figure at 90 N·m.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat height and weight does the K20 25Ah fit?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY publishes no recommended rider height and no maximum load for this listing. Its other bikes in this frame family are given as 5 ft 4 in to 6 ft 2 in with a 330 lb ceiling, but YVY has not stated that those figures apply here, so we are not going to assert it. Ask us and we will raise it with the supplier.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy does this bike have fewer photos than the cheaper ones?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY publishes three images for this listing against eight for the K20 and ten for the K20 Lite, and it is the thinnest description of any bike they sell. We have re-hosted all three on our own servers, which is every image that exists for it. It is a fair signal that this is a less-promoted listing in their range, and we would rather say so than pad the page.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWho makes YVY?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's own company-address page names the business behind the brand as HK Ridstar Trade Limited, and its warranty page routes service verification through Ridstar. Ridstar's own storefront also runs a YVY collection carrying the K20, K20 Pro and K20 Lite. We state that because it is published on their pages; it is a sourcing fact, not a recommendation.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/yvy\"\u003eEvery YVY at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20\"\u003eCompare the K20\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-pro\"\u003eCompare the K20 Pro\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-lite\"\u003eCompare the K20 Lite\u003c\/a\u003e  ·  \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eE-bike laws in your state\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003col class=\"sb-bib\"\u003e\n\u003cli\u003eYVY product page: YVY K20 25Ah Fat Tire Electric Bike, Peak 2000W Full Suspension \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-25ah-electric-bicycle\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Ebike Warranty \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/ebike-warranty\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Company Address page \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/company-address\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Shipping Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/shipping-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Return \u0026amp; Refund Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/return-refund-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e15 U.S.C. § 2085, Low-speed electric bicycles \u003cspan class=\"sb-addr\"\u003euscode.house.gov — 15 U.S.C. § 2085\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eRedtail's state-by-state e-bike law guide\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications and prices are YVY's own, reproduced as published from the archived copy of its product page, with contradictions in its copy flagged rather than resolved silently. The federal definition is quoted from the statute itself and was retrieved twice, independently, from the U.S. Government Publishing Office and Cornell's Legal Information Institute. Warranty terms are YVY's; shipping and return terms on this page are Redtail's. Manufacturer sources are cited by name and address rather than linked, because every link on this page should keep you here. Want to see any source we used? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll send it.\u003c\/p\u003e\n\u003cp class=\"sb-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from an archived copy of YVY's own product page (\u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-25ah-electric-bicycle\u003c\/span\u003e), retrieved 2026-08-25, with the price cross-checked the same day against a second, independently fetched YVY endpoint. Figures are the manufacturer's ratings, not our test results; where YVY's page disagrees with itself, or leaves a specification out, the “How to read this spec sheet” section names it and says what we did. The federal definition is quoted from the statute and was retrieved from two independent publishers. Prices are USD, matched to YVY's own storefront, current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"YVY","offers":[{"title":"Default Title","offer_id":53819658699035,"sku":null,"price":1349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/AgAALxImYzYcgqm6KhpPW6yuwXP0U0MI.png?v=1787706644"},{"product_id":"yvy-k20-lite","title":"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style","description":"\u003cdiv class=\"sb-flow\"\u003e\n\u003cstyle\u003e\n.sb-flow{--sb-ink:#111;--sb-sub:#555;--sb-line:#e8e8e8;--sb-accent:#c8102e;--sb-good:#0a7d3f;--sb-warn:#b3261e;font-family:inherit;color:var(--sb-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.sb-flow *{box-sizing:border-box;}\n.sb-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.sb-flow 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p{font-size:1.08rem;color:var(--sb-sub);margin:0;max-width:52ch;}\n.sb-feat__kicker{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-accent);margin-bottom:.6rem;}\n.sb-feat:nth-of-type(even) .sb-feat__media{order:2;}\n.sb-ledger{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0 0;}\n.sb-ledger\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.4rem 1.6rem;}\n.sb-ledger h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;}\n.sb-ledger--good h3{color:var(--sb-good);}\n.sb-ledger--bad h3{color:var(--sb-warn);}\n.sb-ledger ul{margin:.6rem 0 0;padding-left:1.1rem;}\n.sb-ledger li{margin:.5rem 0;color:var(--sb-sub);}\n.sb-tablewrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--sb-line);border-radius:18px;margin:1rem 0 0;}\n.sb-tablewrap table{width:100%;border-collapse:collapse;min-width:400px;}\n.sb-tablewrap th,.sb-tablewrap td{padding:.85rem 1.2rem;border-bottom:1px solid var(--sb-line);text-align:left;font-size:.97rem;vertical-align:top;}\n.sb-tablewrap thead th{background:#fafafa;font-weight:700;}\n.sb-tablewrap tr:last-child td{border-bottom:0;}\n.sb-tablewrap td:first-child,.sb-tablewrap th:first-child{font-weight:600;}\n.sb-src{font-size:.85rem;color:var(--sb-sub);margin:.7rem 0 0;}\n.sb-src a{color:var(--sb-sub);}\n.sb-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1rem 0 0;}\n.sb-cards\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.3rem 1.5rem;}\n.sb-cards h3{font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--sb-accent);}\n.sb-cards p,.sb-cards li{color:var(--sb-sub);font-size:.95rem;}\n.sb-cards ul{margin:.5rem 0 0;padding-left:1.1rem;}\n.sb-faq{margin:1rem 0 0;border:1px solid var(--sb-line);border-radius:18px;overflow:hidden;}\n.sb-faq details{border-bottom:1px solid var(--sb-line);}\n.sb-faq details:last-child{border-bottom:0;}\n.sb-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.sb-faq .sb-a{padding:0 1.5rem 1.2rem;color:var(--sb-sub);margin:0;}\n.sb-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--sb-line);border-radius:14px;font-size:.9rem;color:var(--sb-sub);}\n.sb-hero{width:100%;border-radius:20px;overflow:hidden;margin:0 0 .6rem;position:relative;}\n.sb-hero img{width:100%;height:auto;display:block;}\n.sb-cap{font-size:.86rem;color:var(--sb-sub);margin:0 0 2rem;padding-left:.2rem;font-style:italic;}\n.sb-bib{margin:1rem 0 0;padding-left:1.4rem;}\n.sb-bib li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;color:var(--sb-sub);}\n.sb-cite{font-weight:600;color:var(--sb-ink);}\n.sb-measured{margin:2rem auto;padding:1.4rem 1.6rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-good);border-radius:14px;background:#fbfdfb;}\n.sb-measured h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-good);margin:0 0 .5rem;}\n.sb-measured p{margin:0;color:var(--sb-ink);}\n.sb-measured .sb-src{margin-top:.6rem;}\n.sb-notes{margin:1rem 0 0;padding:1.2rem 1.5rem;border:1px solid var(--sb-line);border-radius:16px;}\n.sb-notes li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-law{margin:1rem 0 0;padding:1.4rem 1.7rem;border:1px solid var(--sb-line);border-left:4px solid #444;border-radius:14px;background:#fafafa;}\n.sb-law blockquote{margin:.8rem 0;padding-left:1rem;border-left:3px solid #ccc;font-style:italic;color:var(--sb-ink);}\n.sb-law p{margin:.6rem 0;color:var(--sb-sub);}\n.sb-law .sb-stat{font-weight:700;color:var(--sb-ink);}\n@media(max-width:800px){.sb-feat,.sb-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.sb-feat:nth-of-type(even) .sb-feat__media{order:0;}.sb-feat__txt h3{font-size:1.6rem;}.sb-ledger,.sb-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"sb-hero\"\u003e\u003cimg loading=\"eager\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/61jTdMTZ8LL._AC_SX679.jpg?v=1787706585\" alt=\"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cp class=\"sb-cap\"\u003eSame silhouette as the K20 for $110 less. The savings are in three specific places: the motor, the pack and the brakes.\u003c\/p\u003e\n\u003cdiv class=\"sb-answer\"\u003e\n\u003cspan class=\"sb-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThe K20 Lite is the entry point to YVY's moto-style line at $659: same frame and 20x4.0 tires as the K20, with a 1000W motor, a smaller 48V 15.6Ah battery and mechanical disc brakes instead of hydraulic. YVY's own pages disagree with themselves on its range and top speed, and we print both figures below.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"sb-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003e1000W\u003c\/b\u003e\u003cspan\u003eMotor, as rated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e749Wh\u003c\/b\u003e\u003cspan\u003e48V x 15.6Ah battery\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e30 mi\u003c\/b\u003e\u003cspan\u003eThrottle range, claimed\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e330 lb\u003c\/b\u003e\u003cspan\u003eMaximum load\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e20 x 4.0 in\u003c\/b\u003e\u003cspan\u003eFat tires\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho the K20 Lite is for\u003c\/h2\u003e\n\u003cdiv class=\"sb-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe cheapest way into this frame. At $659 it is the least expensive bike YVY sells, and it shares the K20's stance, tires and seat\u003c\/li\u003e\n\u003cli\u003eShorter rides where 30 miles of throttle range is genuinely enough — commutes, errands, campground loops\u003c\/li\u003e\n\u003cli\u003eRiders who would rather put the $110 difference toward a spare battery than toward hydraulic brakes\u003c\/li\u003e\n\u003cli\u003eMixed surfaces: the 20 x 4.0 fat tires and dual suspension carry over from the more expensive bikes unchanged\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou want the strongest brakes in the line — this is the one K20-family bike specified with mechanical rather than hydraulic discs\u003c\/li\u003e\n\u003cli\u003eYou need YVY's numbers to agree with each other. On this model they do not: its top speed and its pedal-assist range are each published two different ways (see below)\u003c\/li\u003e\n\u003cli\u003eYou need a bike inside the federal low-speed electric bicycle definition — 1000W is above the 750W threshold in that definition\u003c\/li\u003e\n\u003cli\u003eYou need a published curb weight, or a UL 2849 \/ UL 2271 certification — YVY publishes none of the three for this bike. Its sitewide EN 15194 test report names a different model\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/61njveeHytL._AC_SX679.jpg?v=1787706588\" alt=\"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style — 1000W — the smallest in the line\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eMotor\u003c\/span\u003e\u003ch3\u003e1000W — the smallest in the line\u003c\/h3\u003e\n\u003cp\u003eYVY rates this hub at 1000W against the K20's 1500W. It is the least powerful bike they currently sell, and it is still above the 750W ceiling in the federal low-speed electric bicycle definition. If the legal classification is what you are shopping on, note that none of YVY's bikes sit inside that definition on the manufacturer's own numbers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/71BsIScbsPL._AC_SX679.jpg?v=1787706591\" alt=\"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style — 749Wh, and YVY prints two capacities for it\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003e749Wh, and YVY prints two capacities for it\u003c\/h3\u003e\n\u003cp\u003eThe product page says 48V 15.6Ah, which is 748.8 Wh by our arithmetic. YVY's own replacement-battery listing describes the K20MINI pack — this bike's SKU — as 48V 15Ah, which would be 720 Wh. The two figures are 4% apart and both come from YVY. We show the product page's number in the table and flag the conflict rather than picking a winner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/1_873fa94b-e392-4509-9489-a018723ccd08.jpg?v=1787706580\" alt=\"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style — Mechanical discs, not hydraulic\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBrakes\u003c\/span\u003e\u003ch3\u003eMechanical discs, not hydraulic\u003c\/h3\u003e\n\u003cp\u003eThis is the substantive difference from the K20 above it. YVY specifies a dual mechanical disc system here and hydraulic dual brakes on the K20. Mechanical discs are easier to adjust at home and cheaper to service; hydraulic ones need less hand force and hold their feel better on long descents. On a bike this heavy, that trade is worth thinking about before you save the $110.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/5_d3c21e33-b79d-4a54-a3ba-4faeccf52b55.jpg?v=1787706600\" alt=\"YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style — 5 ft 4 in to 6 ft 2 in, 330 lb all-in\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eFit\u003c\/span\u003e\u003ch3\u003e5 ft 4 in to 6 ft 2 in, 330 lb all-in\u003c\/h3\u003e\n\u003cp\u003eYVY's FAQ gives the same recommended height range and the same 330 lb maximum load as the K20 — unsurprising, since the frame is shared. As on every bike in this line, the 330 lb figure is total load, not rider weight, so subtract whatever you plan to carry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eWhere this bike sits in US law\u003c\/h2\u003e\n\u003cdiv class=\"sb-law\"\u003e\n\u003cp\u003eBikes in this power class raise one question before any other, so here is the statute rather than a summary of it. Federal law defines the category this way:\u003c\/p\u003e\n\u003cblockquote\u003ethe term “low-speed electric bicycle” means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.\u003c\/blockquote\u003e\n\u003cp class=\"sb-src\"\u003e15 U.S.C. § 2085(b) (Pub. L. 107–319, § 1, Dec. 4, 2002, 116 Stat. 2776). Retrieved 2026-08-25 from the U.S. Government Publishing Office and confirmed word for word against Cornell's Legal Information Institute the same day.\u003c\/p\u003e\n\u003cp\u003eYVY publishes this bike's motor as \u003cspan class=\"sb-stat\"\u003e1000W brushless rear hub (YVY's rating)\u003c\/span\u003e and its top speed as \u003cspan class=\"sb-stat\"\u003e28+ mph in the bullets, 30 mph in the FAQ (see notes)\u003c\/span\u003e. Set those figures against the threshold above and you can see for yourself that the manufacturer's own numbers fall outside the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003cp\u003eWhat that means in practice is decided by your state, not by us. Many states apply moped, motor-driven cycle or off-highway vehicle rules to machines above the federal threshold, and those rules can reach registration, insurance, licensing, helmet requirements and which paths and trails you may use. Some states set their own wattage ceilings that differ from the federal one. We cannot tell you how your state treats this bike, and we are not going to guess: check before you ride on any public road, bike path or trail.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eStart here: \u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e. Current as of 2026-08-25; state law changes, so re-check yours before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"sb-ledger\"\u003e\n\u003cdiv class=\"sb-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe cheapest entry to the moto frame, and the parts that matter for comfort — 20 x 4.0 tires, front fork, rear shock, the same saddle — are not what YVY cut to reach the price\u003c\/li\u003e\n\u003cli\u003eStill a removable pack, so it charges away from the bike like the more expensive models\u003c\/li\u003e\n\u003cli\u003e1000W is the lowest motor rating in YVY's current line, which makes this the closest thing they sell to a conventional e-bike, even though it is still above the federal 750W threshold\u003c\/li\u003e\n\u003cli\u003e7-speed drivetrain and a multi-function LCD carry over from the K20 rather than being downgraded\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYVY's page contradicts itself on pedal-assist range: the bullets say \"up to 60-8 0 miles\" (their typo, as printed) and the FAQ on the same page says up to 50 miles. We print both and adopt neither\u003c\/li\u003e\n\u003cli\u003eIt contradicts itself on top speed too — \"28+++mph\" in the bullets, \"30 mph\" in the FAQ\u003c\/li\u003e\n\u003cli\u003eAnd its battery is published two ways across YVY's own site: 48V 15.6Ah on this product page, 48V 15Ah on YVY's replacement-battery listing for the same K20MINI variant\u003c\/li\u003e\n\u003cli\u003eCertification does not cover this bike. YVY links an EN 15194:2017 test report from every page, but that report names model FM-002\/CDDA20, a cargo electric bicycle, and no UL 2849 or UL 2271 certification is published for anything in the range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the K20 Lite compares\u003c\/h2\u003e\n\u003cp class=\"sb-src\"\u003eAll figures are YVY's own published specs, read from each model's archived product page on 2026-08-25. A dash means YVY publishes no figure for that model.\u003c\/p\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eK20 Lite\u003c\/th\u003e\n\u003cth\u003eK20\u003c\/th\u003e\n\u003cth\u003eK20 Pro\u003c\/th\u003e\n\u003cth\u003eK16\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$659\u003c\/td\u003e\n\u003ctd\u003e$769\u003c\/td\u003e\n\u003ctd\u003e$1,399\u003c\/td\u003e\n\u003ctd\u003e$749\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY\u003c\/td\u003e\n\u003ctd\u003e1500W brushless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e749 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange (claimed)\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eMechanical disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e16 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSource: each model's page on yvyebike.com, archived 2026-08-25. — = not published by YVY for that model.\u003c\/p\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub (YVY's rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e749 Wh (our arithmetic: 48V x 15.6Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging time\u003c\/td\u003e\n\u003ctd\u003eAbout 4-6 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ (see notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle-only range\u003c\/td\u003e\n\u003ctd\u003eUp to 30 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedal-assist range\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ (see notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuspension\u003c\/td\u003e\n\u003ctd\u003eFront fork and rear shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003e7-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiding modes\u003c\/td\u003e\n\u003ctd\u003ePure electric, pedal assist, pedal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eMulti-function LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClimb rating\u003c\/td\u003e\n\u003ctd\u003eUp to 35 degrees, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater resistance\u003c\/td\u003e\n\u003ctd\u003e\"IP5\", as printed by YVY (not a complete IP code)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended rider height\u003c\/td\u003e\n\u003ctd\u003e5 ft 4 in - 6 ft 2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting\u003c\/td\u003e\n\u003ctd\u003eLED headlight and tail light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003e7.2 in phone holder, storage box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003e90% pre-assembled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eNo UL 2849 or UL 2271 certification published. YVY links an EN 15194:2017 test report sitewide, but it covers model FM-002\/CDDA20, a cargo e-bike — not this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (motor, battery, charger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications as published by YVY at \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-lite-fat-tire-electric-bicycle\u003c\/span\u003e, archived 2026-08-25. YVY publishes no specification table for any of its bikes, so every figure above was read out of the copy on that page and the sentence behind each one is on file. Watt-hour totals are our arithmetic and are marked as such. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to read this spec sheet\u003c\/h2\u003e\n\u003cp\u003eManufacturer pages contain marketing, and marketing sometimes disagrees with the marketing an inch below it. Rather than quietly pick numbers, here is every place YVY's own page disagrees with itself for this model, every figure it leaves out, and what we did about each:\u003c\/p\u003e\n\u003cdiv class=\"sb-notes\"\u003e\u003cul\u003e\n\u003cli\u003eThis model carries the most self-contradictions of any bike in YVY's range, so read the table with them in mind. All four are between YVY's own published figures; none is our inference.\u003c\/li\u003e\n\u003cli\u003ePedal-assist range: the bullet list says \"up to 60-8 0 miles in pedal assist mode\" — the space inside the number is YVY's typo, reproduced here as printed — while the FAQ on the same page says \"up to 50 miles in pedal assist mode\". We print both and adopt neither.\u003c\/li\u003e\n\u003cli\u003eTop speed: \"28+++mph\" in the bullets, \"30 mph\" in the FAQ. Again both are YVY's.\u003c\/li\u003e\n\u003cli\u003eBattery capacity: 48V 15.6Ah on this product page, 48V 15Ah on YVY's own replacement-battery listing for the K20MINI variant. That is a 720 Wh vs 749 Wh difference depending which page you read.\u003c\/li\u003e\n\u003cli\u003eYVY publishes no specification table for any bike. Every figure here was read out of marketing prose, and the sentence behind each is recorded in research\/yvy\/specs_20260825.json.\u003c\/li\u003e\n\u003cli\u003eThis bike is listed twice on YVY's storefront — at $659 with the SKU and ten images, and at $969 on a second listing whose description is byte-for-byte identical. A third listing at $1,199 carries different photography of the same bike. We price against the first.\u003c\/li\u003e\n\u003cli\u003eYVY links two PDFs from every page: an EN 15194:2017 test report (report ATS240329142LR, issued 2 April 2024 by Shenzhen ATS Testing Technology, for model FM-002\/CDDA20, a cargo electric bicycle) and the EUIPO trade mark certificate for \"Ridstar\". Neither covers this model. We say so rather than let a sitewide certificate imply cover it does not give.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-measured\"\u003e\n\u003ch3\u003eWhat we counted\u003c\/h3\u003e\n\u003cp\u003eWe pulled YVY's entire live catalogue on 2026-08-25 — all \u003cstrong\u003e46 published listings\u003c\/strong\u003e — and worked out what is actually on sale. Of \u003cstrong\u003e13 bike listings, only 7 are distinct bikes\u003c\/strong\u003e: 6 are the same machines listed a second time, which we proved from byte-identical descriptions, shared image files and, in three cases, by opening the photographs. Six of the thirteen bike listings are the same bikes listed twice — proven by byte-identical descriptions, shared image files, and in three cases by opening the photographs. The duplicates are priced $30–$550 above the merchandised listing of the same bike. We list one page per bike, priced against the listing YVY actually merchandises.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eRedtail original analysis, counted from YVY's public storefront feed and collection endpoints on 2026-08-25; every price cross-checked against a second, independently fetched endpoint (46 of 46 listings agree across two independently fetched endpoints). Availability moves; email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e for anything not shown here.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame and other components\u003c\/td\u003e\n\u003ctd\u003eNot separately stated in YVY's published warranty terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInbound and outbound repair shipping\u003c\/td\u003e\n\u003ctd\u003eCovered by YVY inside the warranty period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eDefects in hardware or firmware under regular use during the warranty period. YVY states it will repair or replace, at no charge, a product or part that proves defective because of hardware malfunction under regular use and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep proof of purchase — YVY excludes claims with no associated purchasing proof, invoice or receipt\u003c\/li\u003e\n\u003cli\u003eReport the fault inside the 1-year window; YVY dates coverage from receipt or purchase, whichever is later\u003c\/li\u003e\n\u003cli\u003eKeep the original packaging for a period after delivery, which YVY asks for directly in its product listings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConditions, malfunctions or damage not resulting from defects in hardware or firmware\u003c\/li\u003e\n\u003cli\u003eClaims with no purchase proof, invoice or receipt, and no authorised dealer confirmation\u003c\/li\u003e\n\u003cli\u003eReturn shipping when the product is found to have no quality issue, or is confirmed working by YVY's after-sales engineers\u003c\/li\u003e\n\u003cli\u003eFaults reported after the warranty period, which YVY offers to resolve at material cost instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eYVY Limited Warranty issued by YVY Bikes, as published on its \u003cspan class=\"sb-cite\"\u003ewarranty page\u003c\/span\u003e. One caveat worth knowing: that page lists its “Warranted Products” as the Q20, Upgraded Q20 and Q20Pro — model names that do not appear on YVY's current storefront. The 1-year motor, battery and charger term above is therefore taken from this bike's own product listing, which states it directly. File with Redtail, not with the manufacturer: we are the merchant of record on this order and we open and carry the warranty claim on your behalf.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.\u003c\/p\u003e\n\u003cp\u003eShips via trusted parcel and freight carriers — UPS, FedEx, and LTL freight for larger items — with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours; claims submitted after this window are not accepted.\u003c\/p\u003e\n\u003cp\u003eBikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours (3 days) of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e · \u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. YVY publishes its own \u003cspan class=\"sb-cite\"\u003eshipping\u003c\/span\u003e and \u003cspan class=\"sb-cite\"\u003ereturn\u003c\/span\u003e terms, which apply to orders placed directly with YVY, not to orders placed here.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"sb-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhat is the YVY K20 Lite's top speed?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY publishes two different answers on the same page: \"28+++mph\" in the product bullets and \"30 mph\" in the FAQ underneath them. We are not going to pick one for you — both are the manufacturer's own figures, neither is a measured result, and real speed depends on rider weight, terrain and charge. Whichever figure is right, it is well above the 20 mph motor-only speed in the federal low-speed electric bicycle definition.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow far can the K20 Lite actually go on one charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY claims up to 30 miles on throttle alone. For pedal assist it publishes two figures on the same page — \"up to 60-8 0 miles\" in the bullets and \"up to 50 miles\" in the FAQ. The honest measure is the pack: 48V x 15.6Ah is about 749 Wh, roughly 22% less energy than the K20's 960 Wh, so expect proportionally less range than that bike under the same conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a 1000W electric bike street legal?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eThat depends on your state, and the federal definition is the starting point. 15 U.S.C. 2085(b) defines a \"low-speed electric bicycle\" as having \"an electric motor of less than 750 watts (1 h.p.)\" and a motor-only top speed under 20 mph for a 170 lb rider. At YVY's rated 1000W this bike is above that threshold, which leads many states to treat such a vehicle under moped or off-highway rules. Check your own state's rules before riding on a road or bike path.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the K20 Lite and the K20?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eThree things, and the frame is not one of them. The K20 has a 1500W motor against the Lite's 1000W; a 48V 20Ah pack (960 Wh) against 48V 15.6Ah (749 Wh); and hydraulic dual brakes against the Lite's mechanical discs. Tires, suspension, drivetrain, display, rider-height range and the 330 lb load ceiling are the same on both. The K20 costs $110 more.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat height and weight does the K20 Lite fit?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's FAQ recommends a rider height of 5 ft 4 in to 6 ft 2 in and gives a 330 lb maximum load. The load figure is everything the bike carries — rider, clothing, bags — not rider weight alone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat battery does the K20 Lite use, and can I buy a spare?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eA removable lithium-ion pack that YVY publishes as 48V 15.6Ah on this product page and as 48V 15Ah on its own replacement-battery listing for the same K20MINI variant. If you are buying a spare, quote the K20MINI variant rather than a capacity, because the capacity is exactly the figure their two pages disagree about.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow long does the K20 Lite take to charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY states about 4 to 6 hours for a full charge. The pack is removable, so it can charge indoors while the bike stays where it is parked.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy does the K20 Lite have fat tires?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eThe 20 x 4.0 in tires run lower pressure than standard tires, which widens the contact patch and adds grip on sand, gravel, snow and broken pavement, while soaking up small impacts. The cost is rolling resistance and weight — fat tires are slower on smooth tarmac, which matters more on the Lite's smaller motor than on the K20.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/yvy\"\u003eEvery YVY at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20\"\u003eCompare the K20\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-pro\"\u003eCompare the K20 Pro\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k16\"\u003eCompare the K16\u003c\/a\u003e  ·  \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eE-bike laws in your state\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003col class=\"sb-bib\"\u003e\n\u003cli\u003eYVY product page: YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-lite-fat-tire-electric-bicycle\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Ebike Warranty \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/ebike-warranty\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Company Address page \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/company-address\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Shipping Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/shipping-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Return \u0026amp; Refund Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/return-refund-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e15 U.S.C. § 2085, Low-speed electric bicycles \u003cspan class=\"sb-addr\"\u003euscode.house.gov — 15 U.S.C. § 2085\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eRedtail's state-by-state e-bike law guide\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications and prices are YVY's own, reproduced as published from the archived copy of its product page, with contradictions in its copy flagged rather than resolved silently. The federal definition is quoted from the statute itself and was retrieved twice, independently, from the U.S. Government Publishing Office and Cornell's Legal Information Institute. Warranty terms are YVY's; shipping and return terms on this page are Redtail's. Manufacturer sources are cited by name and address rather than linked, because every link on this page should keep you here. Want to see any source we used? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll send it.\u003c\/p\u003e\n\u003cp class=\"sb-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from an archived copy of YVY's own product page (\u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20-lite-fat-tire-electric-bicycle\u003c\/span\u003e), retrieved 2026-08-25, with the price cross-checked the same day against a second, independently fetched YVY endpoint. Figures are the manufacturer's ratings, not our test results; where YVY's page disagrees with itself, or leaves a specification out, the “How to read this spec sheet” section names it and says what we did. The federal definition is quoted from the statute and was retrieved from two independent publishers. Prices are USD, matched to YVY's own storefront, current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"YVY","offers":[{"title":"Default Title","offer_id":53819658764571,"sku":"K20MINI","price":659.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/61jTdMTZ8LL._AC_SX679.jpg?v=1787706585"},{"product_id":"yvy-k20-pro","title":"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery","description":"\u003cdiv class=\"sb-flow\"\u003e\n\u003cstyle\u003e\n.sb-flow{--sb-ink:#111;--sb-sub:#555;--sb-line:#e8e8e8;--sb-accent:#c8102e;--sb-good:#0a7d3f;--sb-warn:#b3261e;font-family:inherit;color:var(--sb-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.sb-flow *{box-sizing:border-box;}\n.sb-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.sb-flow 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p{font-size:1.08rem;color:var(--sb-sub);margin:0;max-width:52ch;}\n.sb-feat__kicker{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-accent);margin-bottom:.6rem;}\n.sb-feat:nth-of-type(even) .sb-feat__media{order:2;}\n.sb-ledger{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0 0;}\n.sb-ledger\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.4rem 1.6rem;}\n.sb-ledger h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;}\n.sb-ledger--good h3{color:var(--sb-good);}\n.sb-ledger--bad h3{color:var(--sb-warn);}\n.sb-ledger ul{margin:.6rem 0 0;padding-left:1.1rem;}\n.sb-ledger li{margin:.5rem 0;color:var(--sb-sub);}\n.sb-tablewrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--sb-line);border-radius:18px;margin:1rem 0 0;}\n.sb-tablewrap table{width:100%;border-collapse:collapse;min-width:400px;}\n.sb-tablewrap th,.sb-tablewrap td{padding:.85rem 1.2rem;border-bottom:1px solid var(--sb-line);text-align:left;font-size:.97rem;vertical-align:top;}\n.sb-tablewrap thead th{background:#fafafa;font-weight:700;}\n.sb-tablewrap tr:last-child td{border-bottom:0;}\n.sb-tablewrap td:first-child,.sb-tablewrap th:first-child{font-weight:600;}\n.sb-src{font-size:.85rem;color:var(--sb-sub);margin:.7rem 0 0;}\n.sb-src a{color:var(--sb-sub);}\n.sb-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1rem 0 0;}\n.sb-cards\u003ediv{border:1px solid var(--sb-line);border-radius:16px;padding:1.3rem 1.5rem;}\n.sb-cards h3{font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--sb-accent);}\n.sb-cards p,.sb-cards li{color:var(--sb-sub);font-size:.95rem;}\n.sb-cards ul{margin:.5rem 0 0;padding-left:1.1rem;}\n.sb-faq{margin:1rem 0 0;border:1px solid var(--sb-line);border-radius:18px;overflow:hidden;}\n.sb-faq details{border-bottom:1px solid var(--sb-line);}\n.sb-faq details:last-child{border-bottom:0;}\n.sb-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.sb-faq .sb-a{padding:0 1.5rem 1.2rem;color:var(--sb-sub);margin:0;}\n.sb-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--sb-line);border-radius:14px;font-size:.9rem;color:var(--sb-sub);}\n.sb-hero{width:100%;border-radius:20px;overflow:hidden;margin:0 0 .6rem;position:relative;}\n.sb-hero img{width:100%;height:auto;display:block;}\n.sb-cap{font-size:.86rem;color:var(--sb-sub);margin:0 0 2rem;padding-left:.2rem;font-style:italic;}\n.sb-bib{margin:1rem 0 0;padding-left:1.4rem;}\n.sb-bib li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;color:var(--sb-sub);}\n.sb-cite{font-weight:600;color:var(--sb-ink);}\n.sb-measured{margin:2rem auto;padding:1.4rem 1.6rem;border:1px solid var(--sb-line);border-left:4px solid var(--sb-good);border-radius:14px;background:#fbfdfb;}\n.sb-measured h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--sb-good);margin:0 0 .5rem;}\n.sb-measured p{margin:0;color:var(--sb-ink);}\n.sb-measured .sb-src{margin-top:.6rem;}\n.sb-notes{margin:1rem 0 0;padding:1.2rem 1.5rem;border:1px solid var(--sb-line);border-radius:16px;}\n.sb-notes li{margin:.5rem 0;color:var(--sb-sub);font-size:.95rem;}\n.sb-law{margin:1rem 0 0;padding:1.4rem 1.7rem;border:1px solid var(--sb-line);border-left:4px solid #444;border-radius:14px;background:#fafafa;}\n.sb-law blockquote{margin:.8rem 0;padding-left:1rem;border-left:3px solid #ccc;font-style:italic;color:var(--sb-ink);}\n.sb-law p{margin:.6rem 0;color:var(--sb-sub);}\n.sb-law .sb-stat{font-weight:700;color:var(--sb-ink);}\n@media(max-width:800px){.sb-feat,.sb-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.sb-feat:nth-of-type(even) .sb-feat__media{order:0;}.sb-feat__txt h3{font-size:1.6rem;}.sb-ledger,.sb-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"sb-hero\"\u003e\u003cimg loading=\"eager\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/71w5EHHksNL._AC_SL1500.jpg?v=1787706615\" alt=\"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cp class=\"sb-cap\"\u003eTwo packs, visible in the frame triangle, are what separate the Pro from the rest of the line — and they roughly double the energy on board.\u003c\/p\u003e\n\u003cdiv class=\"sb-answer\"\u003e\n\u003cspan class=\"sb-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThe K20 Pro is the top of YVY's moto line at $1,399: two motors, two 52V 20Ah batteries totalling 2,080Wh, hydraulic dual brakes and 20x4.0 tires. YVY claims up to 75 miles on throttle and 180 with pedal assist. It is the one bike in the range whose motor wattage YVY never publishes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"sb-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003eDual\u003c\/b\u003e\u003cspan\u003eMotors\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e2,080Wh\u003c\/b\u003e\u003cspan\u003eTwo 52V x 20Ah packs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e75 \/ 180 mi\u003c\/b\u003e\u003cspan\u003eThrottle \/ pedal-assist\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e0-3 s\u003c\/b\u003e\u003cspan\u003eTo top speed, claimed\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e20 x 4.0 in\u003c\/b\u003e\u003cspan\u003eFat tires\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho the K20 Pro is for\u003c\/h2\u003e\n\u003cdiv class=\"sb-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRange above everything else. At 2,080Wh this carries more than twice the K20's energy, and that is the honest reason to pay the difference\u003c\/li\u003e\n\u003cli\u003eRiders who want a second pack anyway — buying the Pro is the built-in version of that decision, with both packs on the frame\u003c\/li\u003e\n\u003cli\u003eLong days where charging mid-ride is not an option, since a full charge is a multi-hour commitment on any bike in this line\u003c\/li\u003e\n\u003cli\u003eAnyone who wants hydraulic brakes and the moto frame with the largest drivetrain YVY offers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou want to know the motor's wattage before you buy. YVY does not publish one for this bike anywhere on its listing — see the note below on what its sister storefront says\u003c\/li\u003e\n\u003cli\u003eYou are shopping for something inside the federal low-speed electric bicycle definition. Nothing about a dual-motor 28+ mph bike sits within it\u003c\/li\u003e\n\u003cli\u003eYou need published weight. Two packs and two motors make this the heaviest bike YVY sells, and they state no figure for it\u003c\/li\u003e\n\u003cli\u003eThe 180-mile claim is what is selling you. It is a best-case pedal-assist number from the manufacturer, not a measured result\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/81r3ULZyARL._AC_SL1500.jpg?v=1787706618\" alt=\"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery — Two 52V 20Ah packs — 2,080Wh on the frame\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003eTwo 52V 20Ah packs — 2,080Wh on the frame\u003c\/h3\u003e\n\u003cp\u003eThis is the whole argument for the Pro. Each pack is 52 volts by 20 amp-hours, which is 1,040 Wh; two of them make 2,080 Wh, more than double the K20's 960 Wh. That figure is our multiplication of YVY's own volts and amp-hours, and the per-pack spec is confirmed a second time on YVY's replacement-battery page, which lists the K20PRO battery as 52V 20Ah.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/1600_4e65d772-9246-444c-8644-f1636818b7fd.jpg?v=1787706606\" alt=\"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery — Two of them — and YVY never says how big\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eMotor\u003c\/span\u003e\u003ch3\u003eTwo of them — and YVY never says how big\u003c\/h3\u003e\n\u003cp\u003eThe listing describes \"two powerful brushless motors\" and a dual-motor, dual-battery layout, and then never states a wattage. We are not going to invent one from the sibling models. What we can tell you, attributed: the same company's Ridstar storefront titles the identical model \"K20Pro 2000W Dual Motor\" as of 25 August 2026. That is a different storefront's figure for the same bike, offered as context rather than as YVY's published spec.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/8_342d169d-70d1-4f32-9223-b7f4fcaaf32b.jpg?v=1787706612\" alt=\"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery — 75 miles on throttle, 180 with assist — claimed\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eRange\u003c\/span\u003e\u003ch3\u003e75 miles on throttle, 180 with assist — claimed\u003c\/h3\u003e\n\u003cp\u003eBoth figures are YVY's, and both are best-case. The 180-mile pedal-assist number assumes low assist, flat ground, a light rider and no wind, and YVY's own FAQ lists exactly those variables as the reasons your result will differ. The 2,080Wh pack is the figure to reason from: it is about 2.2 times the K20's energy, so expect roughly that ratio of real-world range, not the ratio of the marketing claims.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-feat\"\u003e\n\u003cdiv class=\"sb-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/61njveeHytL._AC_SX679_ee0f5987-7263-40a9-81e7-db3fc5564293.jpg?v=1787706622\" alt=\"YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery — 5 ft 4 in to 6 ft 2 in, 330 lb all-in\" width=\"1600\" height=\"1200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-feat__txt\"\u003e\n\u003cspan class=\"sb-feat__kicker\"\u003eFit\u003c\/span\u003e\u003ch3\u003e5 ft 4 in to 6 ft 2 in, 330 lb all-in\u003c\/h3\u003e\n\u003cp\u003eYVY gives the same recommended rider height and the same 330 lb maximum load as the rest of the K20 family, which share this frame. Note that the load ceiling did not rise even though the bike itself carries a second motor and a second battery, so the margin left for rider and cargo is tighter here than on the lighter models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eWhere this bike sits in US law\u003c\/h2\u003e\n\u003cdiv class=\"sb-law\"\u003e\n\u003cp\u003eBikes in this power class raise one question before any other, so here is the statute rather than a summary of it. Federal law defines the category this way:\u003c\/p\u003e\n\u003cblockquote\u003ethe term “low-speed electric bicycle” means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.\u003c\/blockquote\u003e\n\u003cp class=\"sb-src\"\u003e15 U.S.C. § 2085(b) (Pub. L. 107–319, § 1, Dec. 4, 2002, 116 Stat. 2776). Retrieved 2026-08-25 from the U.S. Government Publishing Office and confirmed word for word against Cornell's Legal Information Institute the same day.\u003c\/p\u003e\n\u003cp\u003eYVY publishes this bike's motor as \u003cspan class=\"sb-stat\"\u003eDual brushless motors — wattage not published by YVY (see notes)\u003c\/span\u003e and its top speed as \u003cspan class=\"sb-stat\"\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/span\u003e. Set those figures against the threshold above and you can see for yourself that the manufacturer's own numbers fall outside the federal low-speed electric bicycle definition.\u003c\/p\u003e\n\u003cp\u003eWhat that means in practice is decided by your state, not by us. Many states apply moped, motor-driven cycle or off-highway vehicle rules to machines above the federal threshold, and those rules can reach registration, insurance, licensing, helmet requirements and which paths and trails you may use. Some states set their own wattage ceilings that differ from the federal one. We cannot tell you how your state treats this bike, and we are not going to guess: check before you ride on any public road, bike path or trail.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eStart here: \u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e. Current as of 2026-08-25; state law changes, so re-check yours before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"sb-ledger\"\u003e\n\u003cdiv class=\"sb-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2,080Wh is a genuinely large amount of battery — our arithmetic from YVY's own 52V and 20Ah figures, doubled for the two packs\u003c\/li\u003e\n\u003cli\u003eYVY's per-battery figure is independently corroborated on its own replacement-battery listing, which gives the K20PRO pack as 52V 20Ah\u003c\/li\u003e\n\u003cli\u003eHydraulic dual brakes are specified, which is what you want on the heaviest bike in a range\u003c\/li\u003e\n\u003cli\u003eThe dual-battery layout means you can, in principle, keep riding on one pack while the other is off the bike charging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo motor wattage is published for this bike on YVY's own page — the one specification a buyer of a dual-motor bike most wants, and the listing does not state it\u003c\/li\u003e\n\u003cli\u003eThe \"0-3 seconds to 28+++mph\" acceleration claim is printed with no test conditions, no rider weight and no surface. Treat it as marketing copy\u003c\/li\u003e\n\u003cli\u003eCertification does not cover this bike. YVY links an EN 15194:2017 test report from every page, but that report names model FM-002\/CDDA20, a cargo electric bicycle, and no UL 2849 or UL 2271 certification is published for anything in the range\u003c\/li\u003e\n\u003cli\u003eA second YVY listing, the \"K20 Max\" at $1,599, reuses this bike's hero photograph and reproduces this description verbatim — including the words \"The K20Pro electric dirt bike\" in its own opening line. We did not list it, because nothing on that page can be attributed to a distinct product\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the K20 Pro compares\u003c\/h2\u003e\n\u003cp class=\"sb-src\"\u003eAll figures are YVY's own published specs, read from each model's archived product page on 2026-08-25. A dash means YVY publishes no figure for that model.\u003c\/p\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eK20 Pro\u003c\/th\u003e\n\u003cth\u003eK20\u003c\/th\u003e\n\u003cth\u003eK20 Lite\u003c\/th\u003e\n\u003cth\u003eK20 25Ah\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,399\u003c\/td\u003e\n\u003ctd\u003e$769\u003c\/td\u003e\n\u003ctd\u003e$659\u003c\/td\u003e\n\u003ctd\u003e$1,349\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY\u003c\/td\u003e\n\u003ctd\u003e1500W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003e1000W brushless rear hub\u003c\/td\u003e\n\u003ctd\u003ePeak 2000W brushless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003ctd\u003e48V 20Ah removable lithium-ion\u003c\/td\u003e\n\u003ctd\u003e48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah)\u003c\/td\u003e\n\u003ctd\u003e48V 25Ah removable lithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh\u003c\/td\u003e\n\u003ctd\u003e960 Wh\u003c\/td\u003e\n\u003ctd\u003e749 Wh\u003c\/td\u003e\n\u003ctd\u003e1,200 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003ctd\u003e28+ mph in the bullets, 30 mph in the FAQ\u003c\/td\u003e\n\u003ctd\u003e28 mph, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange (claimed)\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003ctd\u003eUp to 60-80 miles in the bullets, up to 50 miles in the FAQ\u003c\/td\u003e\n\u003ctd\u003e45-90 miles per charge, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003ctd\u003eDual mechanical disc\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSource: each model's page on yvyebike.com, archived 2026-08-25. — = not published by YVY for that model.\u003c\/p\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003eDual brushless motors — wattage not published by YVY (see notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eTwo 52V 20Ah removable lithium-ion packs (52V 40Ah total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery energy\u003c\/td\u003e\n\u003ctd\u003e2,080 Wh (our arithmetic: 52V x 20Ah x 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e28+ mph, as printed by YVY (\"28+++ mph\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcceleration\u003c\/td\u003e\n\u003ctd\u003e0-3 seconds to top speed, claimed, no conditions stated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle-only range\u003c\/td\u003e\n\u003ctd\u003eUp to 75 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedal-assist range\u003c\/td\u003e\n\u003ctd\u003eUp to 180 miles, claimed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 in fat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eHydraulic dual disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuspension\u003c\/td\u003e\n\u003ctd\u003eFront fork and rear shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiding modes\u003c\/td\u003e\n\u003ctd\u003ePure electric, pedal assist, pedal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLCD showing speed, battery level and distance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum load\u003c\/td\u003e\n\u003ctd\u003e330 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended rider height\u003c\/td\u003e\n\u003ctd\u003e5 ft 4 in - 6 ft 2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting\u003c\/td\u003e\n\u003ctd\u003eLED headlight, horn and taillight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003e7.2 in phone holder with TPU touch window, storage box, USB charging port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003e90% pre-assembled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging time\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY for this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published by YVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eNo UL 2849 or UL 2271 certification published. YVY links an EN 15194:2017 test report sitewide, but it covers model FM-002\/CDDA20, a cargo e-bike — not this model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (motor, battery, charger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications as published by YVY at \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20pro-fat-tire-electric-bicycle\u003c\/span\u003e, archived 2026-08-25. YVY publishes no specification table for any of its bikes, so every figure above was read out of the copy on that page and the sentence behind each one is on file. Watt-hour totals are our arithmetic and are marked as such. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to read this spec sheet\u003c\/h2\u003e\n\u003cp\u003eManufacturer pages contain marketing, and marketing sometimes disagrees with the marketing an inch below it. Rather than quietly pick numbers, here is every place YVY's own page disagrees with itself for this model, every figure it leaves out, and what we did about each:\u003c\/p\u003e\n\u003cdiv class=\"sb-notes\"\u003e\u003cul\u003e\n\u003cli\u003eThe motor wattage is the significant gap on this page. YVY's listing describes two brushless motors and never rates them. We leave the row as \"not published\" rather than borrowing the K20's 1500W or doubling it, because neither would be YVY's figure.\u003c\/li\u003e\n\u003cli\u003eFor context, attributed and dated: the same company's Ridstar storefront sells the identical model under the title \"K20Pro 2000W Dual Motor\", retrieved 25 August 2026. It is a cross-storefront figure, not a YVY specification, and we have kept it out of the table above for that reason.\u003c\/li\u003e\n\u003cli\u003eBattery energy is our arithmetic: 52 volts x 20 amp-hours x 2 packs = 2,080 Wh. YVY states the pack configuration; the watt-hour total is ours.\u003c\/li\u003e\n\u003cli\u003eThe per-pack 52V 20Ah figure is corroborated independently on YVY's own replacement-battery listing, which gives the K20PRO battery as a 52V 20Ah lithium battery.\u003c\/li\u003e\n\u003cli\u003eYVY's \"K20 Max\" listing at $1,599 reproduces this page's description word for word — including a first line that names \"The K20Pro\" — and reuses this bike's hero image. We treated it as a second listing of this bike rather than a distinct product, and did not create it.\u003c\/li\u003e\n\u003cli\u003eYVY publishes no specification table for any bike. Every figure here was read out of marketing prose, with the sentence behind each recorded in research\/yvy\/specs_20260825.json.\u003c\/li\u003e\n\u003cli\u003eYVY links two PDFs from every page: an EN 15194:2017 test report (report ATS240329142LR, issued 2 April 2024 by Shenzhen ATS Testing Technology, for model FM-002\/CDDA20, a cargo electric bicycle) and the EUIPO trade mark certificate for \"Ridstar\". Neither covers this model. We say so rather than let a sitewide certificate imply cover it does not give.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-measured\"\u003e\n\u003ch3\u003eWhat we counted\u003c\/h3\u003e\n\u003cp\u003eWe pulled YVY's entire live catalogue on 2026-08-25 — all \u003cstrong\u003e46 published listings\u003c\/strong\u003e — and worked out what is actually on sale. Of \u003cstrong\u003e13 bike listings, only 7 are distinct bikes\u003c\/strong\u003e: 6 are the same machines listed a second time, which we proved from byte-identical descriptions, shared image files and, in three cases, by opening the photographs. Six of the thirteen bike listings are the same bikes listed twice — proven by byte-identical descriptions, shared image files, and in three cases by opening the photographs. The duplicates are priced $30–$550 above the merchandised listing of the same bike. We list one page per bike, priced against the listing YVY actually merchandises.\u003c\/p\u003e\n\u003cp class=\"sb-src\"\u003eRedtail original analysis, counted from YVY's public storefront feed and collection endpoints on 2026-08-25; every price cross-checked against a second, independently fetched endpoint (46 of 46 listings agree across two independently fetched endpoints). Availability moves; email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e for anything not shown here.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"sb-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e1 year from the original owner's receipt or purchase date, whichever is later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame and other components\u003c\/td\u003e\n\u003ctd\u003eNot separately stated in YVY's published warranty terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInbound and outbound repair shipping\u003c\/td\u003e\n\u003ctd\u003eCovered by YVY inside the warranty period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eDefects in hardware or firmware under regular use during the warranty period. YVY states it will repair or replace, at no charge, a product or part that proves defective because of hardware malfunction under regular use and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep proof of purchase — YVY excludes claims with no associated purchasing proof, invoice or receipt\u003c\/li\u003e\n\u003cli\u003eReport the fault inside the 1-year window; YVY dates coverage from receipt or purchase, whichever is later\u003c\/li\u003e\n\u003cli\u003eKeep the original packaging for a period after delivery, which YVY asks for directly in its product listings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConditions, malfunctions or damage not resulting from defects in hardware or firmware\u003c\/li\u003e\n\u003cli\u003eClaims with no purchase proof, invoice or receipt, and no authorised dealer confirmation\u003c\/li\u003e\n\u003cli\u003eReturn shipping when the product is found to have no quality issue, or is confirmed working by YVY's after-sales engineers\u003c\/li\u003e\n\u003cli\u003eFaults reported after the warranty period, which YVY offers to resolve at material cost instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eYVY Limited Warranty issued by YVY Bikes, as published on its \u003cspan class=\"sb-cite\"\u003ewarranty page\u003c\/span\u003e. One caveat worth knowing: that page lists its “Warranted Products” as the Q20, Upgraded Q20 and Q20Pro — model names that do not appear on YVY's current storefront. The 1-year motor, battery and charger term above is therefore taken from this bike's own product listing, which states it directly. File with Redtail, not with the manufacturer: we are the merchant of record on this order and we open and carry the warranty claim on your behalf.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"sb-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.\u003c\/p\u003e\n\u003cp\u003eShips via trusted parcel and freight carriers — UPS, FedEx, and LTL freight for larger items — with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours; claims submitted after this window are not accepted.\u003c\/p\u003e\n\u003cp\u003eBikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours (3 days) of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sb-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e · \u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. YVY publishes its own \u003cspan class=\"sb-cite\"\u003eshipping\u003c\/span\u003e and \u003cspan class=\"sb-cite\"\u003ereturn\u003c\/span\u003e terms, which apply to orders placed directly with YVY, not to orders placed here.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"sb-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eHow powerful is the YVY K20 Pro's motor?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY does not say. Its listing describes a dual-motor, dual-battery bike with \"two powerful brushless motors\" and publishes no wattage anywhere on the page, and we are not going to infer one from the other models in the range. For context, and attributed: the same company's Ridstar storefront sells the identical model under the title \"K20Pro 2000W Dual Motor\" as of 25 August 2026. That is a different storefront's figure, not YVY's published specification.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow far can the K20 Pro actually go on one charge?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY claims up to 75 miles on throttle alone and up to 180 miles with pedal assist. Both are best-case manufacturer figures. The number worth reasoning from is the energy on board: two 52V 20Ah packs is 2,080 Wh, about 2.2 times the K20's 960 Wh, so a realistic expectation is roughly 2.2 times whatever the K20 does for you under the same conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the K20 Pro's top speed?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY prints \"28+++ mph\" in pure electric mode on a full charge, and adds a \"0-3 seconds\" acceleration claim with no stated test conditions. Both are the manufacturer's figures rather than measured results. Either way the speed is well above the 20 mph motor-only figure in the federal low-speed electric bicycle definition.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a dual-motor 28 mph electric bike street legal?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eThat is a state question, and the federal definition is where to start. 15 U.S.C. 2085(b) defines a \"low-speed electric bicycle\" as having \"an electric motor of less than 750 watts (1 h.p.)\" and a motor-only top speed under 20 mph for a 170 lb rider. A dual-motor bike YVY rates at 28+ mph does not meet that description, and many states then apply moped or off-highway rules. Check your own state before riding on a road or bike path.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the K20 Pro and the K20?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003ePower and energy. The Pro runs two motors against the K20's single 1500W unit, and carries two 52V 20Ah packs (2,080 Wh) against one 48V 20Ah pack (960 Wh). Both have hydraulic dual brakes, 20 x 4.0 tires, dual suspension, the same rider-height range and the same 330 lb load ceiling. The Pro costs $630 more.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat about the YVY K20 Max — is that a better version?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eWe could not establish that it is a different bike. YVY's \"K20 Max\" listing at $1,599 uses this bike's hero photograph and reproduces this page's description verbatim, opening with the words \"The K20Pro electric dirt bike for adults\". There is no figure on that page that can be attributed to a distinct product, so we did not list it rather than sell you specifications borrowed from another model.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat height and weight does the K20 Pro fit?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eYVY's FAQ recommends 5 ft 4 in to 6 ft 2 in and gives a 330 lb maximum load — the same figures as the rest of the K20 family, which shares this frame. Worth noting that the ceiling did not rise for the extra motor and battery, so the margin left for you and your cargo is tighter on this model.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I charge one battery while riding on the other?\u003c\/summary\u003e\u003cp class=\"sb-a\"\u003eIn principle yes, and that is the practical advantage of the layout: both packs are removable, so one can charge indoors while the bike stays usable on the other. YVY does not publish a charging time for this model specifically; it quotes about 4 to 6 hours on the single-pack bikes in the same range.\u003c\/p\u003e\n\u003cp class=\"sb-a\"\u003e\u003cem\u003eEditorial addition: we were not able to observe anyone asking this, and include it because it follows directly from how this bike is built.\u003c\/em\u003e\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/yvy\"\u003eEvery YVY at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20\"\u003eCompare the K20\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-lite\"\u003eCompare the K20 Lite\u003c\/a\u003e  ·  \u003ca href=\"\/products\/yvy-k20-25ah\"\u003eCompare the K20 25Ah\u003c\/a\u003e  ·  \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eE-bike laws in your state\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003col class=\"sb-bib\"\u003e\n\u003cli\u003eYVY product page: YVY K20 Pro Dual-Motor Fat Tire Electric Bike, Twin Battery \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20pro-fat-tire-electric-bicycle\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Ebike Warranty \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/ebike-warranty\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Company Address page \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/company-address\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Shipping Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/shipping-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003eYVY Return \u0026amp; Refund Policy \u003cspan class=\"sb-addr\"\u003eyvyebike.com\/pages\/return-refund-policy\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e15 U.S.C. § 2085, Low-speed electric bicycles \u003cspan class=\"sb-addr\"\u003euscode.house.gov — 15 U.S.C. § 2085\u003c\/span\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/shipping-policy\"\u003eRedtail Shipping Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/pages\/refund-policy\"\u003eRedtail Refund \u0026amp; Return Policy\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/redtailebikes.com\/blogs\/journal\/electric-bike-laws\"\u003eRedtail's state-by-state e-bike law guide\u003c\/a\u003e. Retrieved 2026-08-25.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"sb-src\"\u003eSpecifications and prices are YVY's own, reproduced as published from the archived copy of its product page, with contradictions in its copy flagged rather than resolved silently. The federal definition is quoted from the statute itself and was retrieved twice, independently, from the U.S. Government Publishing Office and Cornell's Legal Information Institute. Warranty terms are YVY's; shipping and return terms on this page are Redtail's. Manufacturer sources are cited by name and address rather than linked, because every link on this page should keep you here. Want to see any source we used? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll send it.\u003c\/p\u003e\n\u003cp class=\"sb-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from an archived copy of YVY's own product page (\u003cspan class=\"sb-addr\"\u003eyvyebike.com\/products\/yvy-k20pro-fat-tire-electric-bicycle\u003c\/span\u003e), retrieved 2026-08-25, with the price cross-checked the same day against a second, independently fetched YVY endpoint. Figures are the manufacturer's ratings, not our test results; where YVY's page disagrees with itself, or leaves a specification out, the “How to read this spec sheet” section names it and says what we did. The federal definition is quoted from the statute and was retrieved from two independent publishers. Prices are USD, matched to YVY's own storefront, current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"YVY","offers":[{"title":"Default Title","offer_id":53819658830107,"sku":"K20PRO-1","price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/71w5EHHksNL._AC_SL1500.jpg?v=1787706615"}],"url":"https:\/\/redtailebikes.com\/collections\/yvy.oembed","provider":"Redtail Ebikes","version":"1.0","type":"link"}