{"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 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\/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\/products\/yvy-k20-pro","provider":"Redtail Ebikes","version":"1.0","type":"link"}