YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style
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YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style
Same silhouette as the K20 for $110 less. The savings are in three specific places: the motor, the pack and the brakes.
The cheapest way onto the moto frame: $659, same tires, same suspension, same 330 lb rating.
The YVY K20 Lite is the entry pick at $659: the same 20x4.0 moto frame and dual suspension as the K20, with a 1000W motor and a removable 48V 15.6Ah pack. Rated to 330 lb. Free US shipping, a US warranty we file for you, and Shop Pay instalments at checkout.
YVY is not a separate maker. Its own company-address page names the business as "HK RIDSTAR TRADE LIMITED", its warranty page routes service to a ridstar.net support address, every page it publishes links the Ridstar trade-mark certificate, and ridstar.com runs its own "YVY Ebikes" collection. Its warranty page lists as "Warranted Products" the "YVY Q20 1200W", the "YVY Upgraded Q20 1500W" and the "YVY Q20Pro 2000W", the model family the US Consumer Product Safety Commission has told owners to stop using.
On published specifications the K20 Lite is closest to the Ridstar H20 1000W; YVY's own battery page lists its pack under the name "K20MINI". No regulator's notice names this model as of September 11, 2026.
The CPSC issued two stop-use warnings on that family in 2026: March 19, "Ridstar Q20 and Q20 Pro", batteries and wires that "can ignite" (11 fires); and June 25, "Ridstar Q20 and Q20 Lite", a front wheel that "can detach without warning" (32 reports, 31 injuries). The manufacturer "has refused to agree to an acceptable recall" and "has been unresponsive". No notice names a YVY model. Whether a K-badged bike shares the front wheel, fork or battery those notices describe is published by neither company, and this page will not guess.
Before either US notice, the UK Office for Product Safety and Standards published Product Safety Report 2506-0011 on 19 June 2025 for the "Ridstar E-Bikes Q20-Plus, Q20-Mini, E26 Pro and Chargers", risk level "Serious": "the charger has poor quality soldering, and the transformer does not meet the minimum requirements for creepage and clearance distances." Its corrective measure: "The import has been rejected at the border."
Two product-liability suits over a detached Ridstar front wheel were filed in 2026 and are undecided: Cunanan v. Amazon.com Services LLC (D. Or., filed April 7, 2026) alleges a Ridstar Q20 caused "numerous facial fractures"; L.E. v. Walmart Inc. (Palm Beach County, filed July 30, 2026, removed to S.D. Fla.) alleges a Walmart-bought Ridstar's front wheel "unexpectedly detached during normal operation" and injured a minor. Both are allegations, not findings.
The full record, including Trustpilot scores across the company's five Ridstar domains and an owner writing that "Amazon and Ridstar/YVY are not interested in helping me", is in our Ridstar brand profile, verified September 11, 2026.
- 1000WMotor, as rated
- 749Wh48V x 15.6Ah battery
- 30 miThrottle range, claimed
- 330 lbMaximum load
- 20 x 4.0 inFat tires
Why the K20 Lite
1000W — the smallest in the line
YVY 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.
749Wh, and YVY prints two capacities for it
The 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.
Mechanical discs, not hydraulic
This 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.
5 ft 4 in to 6 ft 2 in, 330 lb all-in
YVY'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.
What stands out on the spec sheet
- The 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
- Still a removable pack, so it charges away from the bike like the more expensive models
- 1000W 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
- 7-speed drivetrain and a multi-function LCD carry over from the K20 rather than being downgraded
Why buy it from Redtail
The price
$659
Matched to YVY's own published US price, checked 29 August 2026.
Financing
4 payments
Shop Pay instalments split it into four interest-free payments at checkout, with longer monthly terms offered on larger carts.
Free US shipping
$0
Every e-bike ships free in the lower 48, tracking emailed the moment it leaves.
We file the warranty claim
Done for you
Something goes wrong, you send us photos and your order number and we file the claim and track it to the finish. You never deal with the factory.
US support
Real answers
Fit, delivery, and what the rules are where you ride — a US-based team answers before you order, backed by a 1-year warranty on motor, battery and charger.
Not sure it fits your height, your driveway or the rules where you ride? Email support@redtailebikes.com before you order and we will confirm it — then buy with the button above.
Who the K20 Lite fits
It’s your bike if
- The 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
- Shorter rides where 30 miles of throttle range is genuinely enough — commutes, errands, campground loops
- Riders who would rather put the $110 difference toward a spare battery than toward hydraulic brakes
- Mixed surfaces: the 20 x 4.0 fat tires and dual suspension carry over from the more expensive bikes unchanged
Want something different? We stock it
- If you want hydraulic brakes and a bigger pack — the K20 is $769 for 1500W, 960Wh and hydraulic dual discs on the identical frame.
- If you are shorter than 5 ft 4 in — the K16 is 16-inch wheels, sized from 5 ft 2 in, with the full 1500W motor.
- If range is the whole decision — the K20 25Ah is 1,200Wh — 60% more energy than this bike carries.
Straight answers before you order
YVY's page publishes two pedal-assist ranges for this bike — "up to 60-80 miles" in the bullets and "up to 50 miles" in the FAQ — and two top speeds, 28+ mph and 30 mph.
We print both rather than pick the flattering one. The figure that does not move is the pack: 48V x 15.6Ah is about 749Wh. If you want a range number you can plan a day around instead of a span, the K20 carries 960Wh and the K20 25Ah carries 1,200Wh. See the K20.
This is the one bike in the K20 family with mechanical disc brakes rather than hydraulic.
Mechanical discs are the ones you can adjust at home with a 5mm key and service for a few dollars, which is why they are still specified on bikes meant to be maintained by their owner. If you ride long descents or want less hand force, the K20 is $110 more with hydraulics on the same frame. Step up to the K20.
YVY publishes the battery two ways across its own site: 48V 15.6Ah on this page, 48V 15Ah on its replacement-battery listing for the same K20MINI pack.
The difference is about 29Wh, under 4%. When you order a spare, quote the K20MINI variant rather than a capacity and you will get the right pack — we stock it, and it ships free with the bike. Add a spare battery.
What you get with the order
Shipping
Free shipping on every electric bike within the contiguous United States (lower 48).
Orders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch, depending on location.
Delivery protection
Inspect 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.
Bikes with power, charging, or component issues are covered under the manufacturer warranty; Redtail coordinates repair or replacement remotely at no cost to the customer.
Returns
Buy direct from YVY and their published terms apply: a 15% processing fee plus $200 of return shipping you pay, on a 15-day window capped at 10 miles on the odometer. Buy here and Redtail's terms apply instead — a flat 15% on unopened orders within 3 days, and the freight in was free to begin with. Full terms: Redtail Refund & Return Policy.
Alaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: Redtail Shipping Policy · Redtail Refund & Return Policy.
Owning it in your state
Built for trails, sand, private land and off-road riding. YVY publishes a 1000W motor and a top speed of 28+ mph. Federal law defines a "low-speed electric bicycle" as having an electric motor of less than 750 watts and a motor-only top speed under 20 mph (15 U.S.C. 2085(b)), so this bike sits outside that definition on the manufacturer's own numbers, and states differ in how they treat machines above it. Our state-by-state guide has the detail for where you ride. The detail for where you ride is in our state-by-state e-bike law guide.
How the K20 Lite compares
| Spec | K20 Lite | K20 | K20 Pro | K16 |
|---|---|---|---|---|
| Price | $659 | $769 | $1,399 | $749 |
| Motor | 1000W brushless rear hub | 1500W brushless rear hub | Dual brushless motors — wattage not published by YVY | 1500W brushless |
| Battery | 48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah) | 48V 20Ah removable lithium-ion | Two 52V 20Ah removable lithium-ion packs (52V 40Ah total) | 48V 20Ah removable lithium-ion |
| Battery energy | 749 Wh | 960 Wh | 2,080 Wh | 960 Wh |
| Top speed | 28+ mph † | 28+ mph, as printed by YVY ("28+++ mph") | 28+ mph, as printed by YVY ("28+++ mph") | 28+ mph, as printed by YVY ("28+++ mph") |
| Brakes | Dual mechanical disc | Hydraulic dual disc | Hydraulic dual disc | Mechanical disc |
| Tires | 20 x 4.0 in fat | 20 x 4.0 in fat | 20 x 4.0 in fat | 16 x 4.0 in fat |
| Maximum load | 330 lb | 330 lb | 330 lb | 330 lb |
Every figure is YVY's own published spec, read from each model's archived product page on 2026-08-25. — = YVY publishes no figure for that model.
Full specifications
| Motor | 1000W brushless rear hub (YVY's rating) |
| Battery | 48V 15.6Ah removable lithium-ion (see notes — YVY also publishes 15Ah) |
| Battery energy | 749 Wh (our arithmetic: 48V x 15.6Ah) |
| Charging time | About 4-6 hours |
| Top speed | 28+ mph † |
| Throttle-only range | Up to 30 miles, claimed |
| Pedal-assist range | Up to 60-80 miles † |
| Tires | 20 x 4.0 in fat |
| Brakes | Dual mechanical disc |
| Suspension | Front fork and rear shock |
| Drivetrain | 7-speed |
| Riding modes | Pure electric, pedal assist, pedal |
| Display | Multi-function LCD |
| Climb rating | Up to 35 degrees, claimed |
| Water resistance | "IP5", as printed by YVY (not a complete IP code) |
| Maximum load | 330 lb |
| Recommended rider height | 5 ft 4 in - 6 ft 2 in |
| Lighting | LED headlight and tail light |
| Included | 7.2 in phone holder, storage box |
| Assembly | 90% pre-assembled |
| Weight | Not published by YVY |
| Certification | No 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 |
| Motor warranty | 1 year (motor, battery, charger) |
† YVY publishes more than one figure for this row; the manufacturer's first published value is shown and both are recorded below. Specifications as published by YVY at yvyebike.com/products/yvy-k20-lite-fat-tire-electric-bicycle, archived 2026-08-25. Watt-hour totals are ours, from YVY's volts and amp-hours.
How to read this spec sheet
- This 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.
- Pedal-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.
- Top speed: "28+++mph" in the bullets, "30 mph" in the FAQ. Again both are YVY's.
- Battery 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.
- YVY 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.
- This 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.
- YVY 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.
We pulled YVY's entire live catalogue on 2026-08-25 — all 46 published listings — and found 13 bike listings covering only 7 distinct bikes. We list one page per bike, priced against the listing YVY actually merchandises, with every price cross-checked against a second independent endpoint (46 of 46 listings agree across two independently fetched endpoints).
Warranty
| Component | Coverage |
|---|---|
| Motor | 1 year from the original owner's receipt or purchase date, whichever is later |
| Battery | 1 year from the original owner's receipt or purchase date, whichever is later |
| Charger | 1 year from the original owner's receipt or purchase date, whichever is later |
| Frame and other components | Not separately stated in YVY's published warranty terms |
| Inbound and outbound repair shipping | Covered by YVY inside the warranty period |
YVY Limited Warranty issued by YVY Bikes, as published on its warranty page. 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.
Frequently asked questions
What is the YVY K20 Lite's top speed?
YVY 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.
How far can the K20 Lite actually go on one charge?
YVY 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.
Is a 1000W electric bike street legal?
That 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.
What is the difference between the K20 Lite and the K20?
Three 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.
What height and weight does the K20 Lite fit?
YVY'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.
What battery does the K20 Lite use, and can I buy a spare?
A 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.
How long does the K20 Lite take to charge?
YVY 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.
Why does the K20 Lite have fat tires?
The 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.
Buy the K20 Lite nowOne click, straight to Shop Pay checkout — four interest-free payments available.
Keep looking
Every YVY at Redtail · Compare the K20 · Compare the K20 Pro · Compare the K16 · E-bike laws in your state · Shop electric bikes by type
Primary sources
- YVY product page: YVY K20 Lite Fat Tire Electric Bike, 1000W Moto-Style yvyebike.com/products/yvy-k20-lite-fat-tire-electric-bicycle. Retrieved 2026-08-25.
- YVY Ebike Warranty yvyebike.com/pages/ebike-warranty. Retrieved 2026-08-25.
- YVY Return & Refund Policy yvyebike.com/pages/return-refund-policy. Retrieved 2026-08-25.
- 15 U.S.C. § 2085, Low-speed electric bicycles uscode.house.gov — 15 U.S.C. § 2085. Retrieved 2026-08-25.
- Redtail Shipping Policy. Retrieved 2026-08-25.
- Redtail Refund & Return Policy. Retrieved 2026-08-25.
- our state-by-state e-bike law guide. Retrieved 2026-08-25.
How we verified this page. Every specification above was read from an archived copy of YVY's own product page (yvyebike.com/products/yvy-k20-lite-fat-tire-electric-bicycle), 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. The federal definition is quoted from the statute itself, retrieved from two independent publishers. Prices are USD, current at the date shown. Corrections: support@redtailebikes.com.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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