Windone RS5

Start with the federal definition, because every state class system is built on it. 15 U.S.C. § 2085 defines a low-speed electric bicycle as a two- or three-wheeled vehicle with fully operable pedals, a motor of less than 750 W, and a top speed under 20 mph on motor power alone. The RS5 fails all three. It has folding foot pegs and no cranks. Windone rates the motor at 1,000 W continuous, with 2,200 W peak. And it claims 37 mph. Class 1 and Class 2 stop at 20 mph and Class 3 at 28 mph on pedal assist, and all three sit inside that federal definition, so the RS5 fits none of them. No speed mode changes this. Eco mode lowers the speed; it does not add pedals or remove watts.

Two lines on Windone's own page muddy this, so they are worth reading carefully. Its box list includes "Pedal (R and L)", and its FAQ quotes range "with pedal assist". No Windone image shows a crank, chainring or pedal arm: the chain runs from the frame-mounted motor straight to the rear sprocket, and the "pedals" are the foot pegs. The page also tells buyers to "follow local Ebike laws". E-bike laws do not cover this machine. Off-highway vehicle rules do.

Amazon itself files the RS5 under Motorcycles & ATVs, not electric bicycles, and the Red listing describes it for "dirt trails and private land". Q9 Powersports, a Madison, Wisconsin dealer, states that it "is designed exclusively for off-road use only". In practice that leaves private land with the owner's permission, designated off-highway vehicle (OHV) areas, and tracks. Many states require an OHV registration or trail permit for public riding areas, and some set minimum ages or supervision rules for young OHV riders, so check your state's off-highway vehicle agency before the first ride. On a public road, bike lane, shared path or sidewalk it is an unregistered motor vehicle, and an off-road bike like this is rarely if ever registrable for the road, because it was not built to the federal safety standards that road motorcycles carry. Our guide to whether Sur-Rons are street legal covers the same category at full size, and the street-legal-by-state page shows where the e-bike line sits in your state.

The Amazon title says "Teens & Adults (13+)". Windone's own product page says "For Teens & Adults" with no number, and its FAQ says the three speed levels "allow safe riding for beginners, teens, and adults". Q9 Powersports lists a recommended age of 16 to 60 years old. Those cannot all be the right answer for a machine that claims 37 mph, and we would follow the highest: 16, with riding experience.

The fit numbers widen the gap. The listing recommends riders from 3 ft 11 in to 5 ft 11 in (119 to 180 cm). The median 13-year-old on the CDC growth charts is about 5 ft 1 in, so the bottom of that range fits children well under 13. Seat height is 29.1 in on the listing and 30.3 in on Windone's own dimension graphic. RunPlayBack's reviewer, who has longer legs, found the cockpit compact and sat further back than they would like.

Speed is why the age question matters. Kinetic energy rises with the square of speed, so the same rider on the same 116.2 lb bike carries (37 ÷ 20)² = 3.4 times as much energy at 37 mph as at 20 mph, the Class 1 and Class 2 cap. Some things on the RS5 help. RunPlayBack reports its three modes at about 15 mph, about 22 mph and "the mid-30s", lists a key ignition that an adult can keep, and described the throttle ramp as smooth and friendly for beginners. If a teenager rides it, start in the lowest mode and move up only with experience, and dress them the way Windone's own product photos do: full-face motocross helmet, goggles, gloves, boots and body armour. A bicycle helmet certified to CPSC's 16 CFR Part 1203 is designed for bicycle crashes; at these speeds use a motorcycle helmet with a DOT FMVSS No. 218 label.

If you are shopping for a teenager's transport rather than a trail toy, read our e-bike age limits by state and our e-bike picks for teens, which are legally bicycles.

The Amazon listing makes two certification claims: a "UL 2271 certified battery system" and a "UL 2272 certified electric vehicle system". It names no testing laboratory and no certificate number, and Windone's own product page does not mention either standard, so we report both as the listing's claims; we could not verify them in a certifier's directory.

The two standards cover different things. UL 2271 covers batteries for light electric vehicles: the pack, its cells and its management system. UL 2272 covers the electrical system of personal e-mobility devices, the standard written for hoverboards and e-scooters; the e-bike equivalent is UL 2849. A pedal-less youth dirt bike is not an e-bike, so citing UL 2272 is reasonable rather than a mix-up. Both standards test the same kind of risk: fire and electric shock from the battery, charger and wiring under overcharging, short circuits, vibration, drops and water. Neither one tests brakes, frame strength, top speed or what happens to a rider in a crash, so a UL mark says nothing about whether a 37 mph machine suits a 13-year-old.

On a 1,080 Wh pack the claims are still worth having. Charge it where you can see it and away from an exit route, and read our battery fire safety guide. The CPSC recall database listed no recall for any Windone product as of October 28, 2026.

Windone calls the motor a mid-drive. On this bike that means it sits in the frame and drives a sprocket on the rear wheel by chain through a full twist throttle; there are no cranks, so it does not work like a mid-drive e-bike. Windone states 1,000 W continuous and 2,200 W peak, and Windone is more forthcoming than most here: plenty of listings in this category print only the peak. It also claims 30 degrees of hill climbing, which matches the listing's "up to 60% grade" (a 60% grade is about 31 degrees). We cannot check the climbing claim, and RunPlayBack found the low-end punch "mellow", wanting more torque off the line. Top speed comes close to the claim: the reviewer saw about 34 to 35 mph in the top mode "in the right conditions", including a slight downhill, against Windone's 37.

The battery is 48 V x 22.5 Ah = 1,080 Wh, large for a bike this size. The 45-mile claim works out at 1,080 ÷ 45 = 24 Wh per mile. That is ordinary e-bike consumption, plausible in Eco mode with a light rider on flat, firm ground. A dirt bike gets no help from pedals, rolls on knobby tires, weighs 116.2 lb before the rider, and is bought to be ridden in the fast mode. At 35 Wh per mile the pack gives 31 miles; at 50 Wh per mile, trail riding in Sport, it gives 22. Plan on 20 to 30 miles per charge; 25 is our planning figure. Windone's FAQ quotes a different number again, 46.6 miles "with pedal assist", on a bike with no pedals, so we ignore it. Q9 Powersports quotes a 6.5 to 7.5 hour charge time. Our range guide explains the Wh-per-mile method.

Hydraulic disc brakes on both wheels are the best thing on the spec sheet, and the independent review agrees: RunPlayBack called them the bike's highlight, with enough bite to lock the wheels, and argued that anything over about 20 mph should have moto-style brakes. At 37 mph that is a requirement, not an upgrade.

The suspension description on Amazon needs a correction. The listing says "front hydraulic suspension and a rear air shock". Windone's page specifies a 145 mm front fork and a rear nitrogen gas shock, and every Windone render shows a coil spring on that shock. Read it as a coil-over shock with a gas-charged damper, not an air spring: you set it with spring preload, not a pump. RunPlayBack found the setup stiff overall, good for control and tiring on longer rides, with very slow rear rebound; the rear could bottom out, but only when forced.

Windone lists an iron frame, and the reviewer found it rigid, with nothing flimsy or rattling. The bike has an LED headlight and tail light, a horn and a colour display, and RunPlayBack lists front and rear turn signals; none of that makes it road legal. On the review unit the kickstand rubbed the swingarm when folded, out of the box, which is worth checking on delivery. Water resistance is unclear: Windone's spec table says IPX6, its own FAQ says IPX4 and advises against heavy rain, so assume the lower rating and keep it out of deep water. The listing states a 1-year warranty covering the battery, motor and frame, which is short for a 116.2 lb machine at this price. Windone says it ships 90% pre-assembled, and its dimension graphic gives 7.7 in of ground clearance.

Amazon listed the Light Green RS5 at $899.98 (as of Oct 30, 8:11 AM EDT, subject to change) on October 28, 2026. That was below the price on Windone's own store the same day, where all four colours cost the same and a much higher "regular price" sits beside the sale price; we would ignore that figure. Windone sells Green, Red, Black and White liveries. Amazon's "Light Green" is the bike Windone calls Black, a gunmetal frame with pale mint chevrons on the side panels, and Amazon also lists a Red version. Check the photos on the colour you select, because Windone's own Green is a different, brighter lime design.

Buy the RS5 if you have private land or an OHV area nearby, the rider is between about 4 and 6 ft tall and old enough to handle a small motorcycle, and you will buy the protective gear with it. Hydraulic brakes, a 1,080 Wh pack and a 265 lb load limit are a lot of trail machine for a smaller rider at this price, and the key and speed modes give a parent real control over how it is used.

Skip it if anyone in the house expects to ride it to school, to a friend's house or on a bike path: there is no setting that makes that legal. Skip it for a young beginner who will ride unsupervised. If you want the dirt-bike look in something that is legally a bicycle, start with our street-legal electric dirt bikes, all inside the three-class system. Windone's other model in our catalogue, the Windone E2, is a pedal e-bike and a different kind of vehicle. Among the other dirt-styled listings we cover, the ASKGO Dirt 5500 and Xathquia Dirt 20 are larger machines that keep their pedals, and their speed puts them outside every class too.