{"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 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 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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","url":"https:\/\/redtailebikes.com\/products\/yvy-k20","provider":"Redtail Ebikes","version":"1.0","type":"link"}