Filter
750W Electric Bikes
A 750W electric bike is the most power US law lets you ride without a license. What actually moves you up a hill is torque, not watts. Both Fastron fat-tire bikes below run a 48V 750W motor with 85Nm of torque, a 720Wh battery, and 26" × 4" tires. Same motor, same battery, same $1,489 — you pick the frame you step over or step through.
UL 2849 / UL 2271
Certified
Factory-Direct
From $1,050
Free US Shipping
From Texas
Up to 60-Mile
Range
2-Year
Warranty
How Fast Is a 750W Electric Bike
We publish 750W as the rated figure — the power the motor holds continuously. Plenty of listings quote a "peak" number that is 50–100% higher and print that on the poster instead. A peak watt you can hold for three seconds does not climb a half-mile hill. So compare rated watts to rated watts, and then look at torque.
Torque is why the Fastron climbs. At 85Nm it pulls a 300 lb loaded weight up a grade where a 500W bike stalls. Expect roughly 12–14 mph on a real hill with a rider aboard — slower than flat ground, but it keeps moving instead of asking you to pedal it home.
Our 750W Electric Bikes
| Spec | Fastron SO | Fastron ST |
|---|---|---|
| Price | $1,489 (from $1,899) | $1,489 (from $1,899) |
| Motor (rated) | 48V 750W | 48V 750W |
| Torque | 85 Nm | 85 Nm |
| Battery | 720Wh (48V 15Ah) | 720Wh (48V 15Ah), LG 21700 cells |
| Range | Up to 60 miles | Up to 60 miles |
| Top speed | 20 mph default / 28 mph unlocked | 20 mph default / 28 mph unlocked |
| Tires | 26" × 4.0" fat | 26" × 4.0" Vee fat |
| Brakes | Tektro 180mm hydraulic disc | Tektro 180mm hydraulic disc |
| Suspension | Alloy fork, 3.14" travel | Alloy fork, 3.15" travel |
| Gears | Shimano 8-speed | Shimano 8-speed (12T–32T) |
| Sensor | Cadence | Cadence |
| Weight | 70 lb (with battery) | 70 lb (with battery) |
| Payload | 300 lb | 300 lb |
| Rider height | 5'3"–6'5" | 5'3"–6'5" |
| Frame | Step-over (high top tube) | Step-through (low, open frame) |
| Certification | UL 2849 (bike) / UL 2271 (battery) | UL 2849 (bike) / UL 2271 (battery) |
How to Choose a 750W Electric Bikes
Four specs decide whether a 750W bike does what you want. The wattage on the banner is not one of them — every bike here is already 750W.
Rated watts, not peak— 750W should be the continuous rating. If a listing leads with a bigger "peak" number, ask what the rated figure is. We print 750W because that is the number the motor holds all day.
Torque in Nm — This is your real climbing and hauling spec. The Fastron's 85Nm is what moves a 300 lb load up a grade; two bikes at 750W can climb very differently depending on this number.
The speed cap and your local law— The Fastron ships at 20 mph and unlocks to 28 mph. 20 mph is Class 2 speed; 28 mph is Class 3 speed. Some bike paths allow one and not the other — check your city before you unlock it.
Battery watt-hours, not just voltage— Range lives in the 720Wh pack, not in "48V." Watt-hours (volts × amp-hours) is the number to compare between brands. UL 2271 on the pack and UL 2849 on the whole bike is the certification to look for.
750W Electric Bike FAQs
The Fastron ships capped at 20 mph and unlocks to 28 mph on flat ground. The 30–32 mph you sometimes see quoted assumes a downhill and a light rider — not a number to buy on. Your real top speed drops a few mph with a heavier rider, a headwind, or a hill.
Rated (or nominal) watts is the power the motor holds continuously — we publish 750W. Peak is a short burst, often 50–100% higher, that some brands print on the banner instead. A peak watt lasts a few seconds; it won't climb a long hill. Compare rated watts to rated watts, then compare torque.
Climbing is set by torque, not wattage — the Fastron's 85Nm is what matters. On a real grade with a rider aboard expect around 12–14 mph, slower than flat ground but steady. It carries the full 300 lb payload uphill instead of stalling.
750W is the federal ceiling for an ebike ridden without a license, so the motor size itself is fine in most states. Speed is what varies: the Fastron's 20 mph default is Class 2 territory; unlock it to 28 mph and you're at Class 3 speed, which some bike paths restrict. Check your state and city before you unlock it.
The Fastron is rated up to 60 miles from its 720Wh battery — a low-assist, slow-pedal figure. At a 18–22 mph commute pace or on the throttle, plan on roughly 30–40 miles. Range lives in the battery's watt-hours, not the motor's watts.
Yes if you climb, haul, or weigh over ~220 lb. A 500W bike is fine for flat commutes and light riders; it starts to strain on hills and under load. The Fastron's 750W and 85Nm give you margin exactly where a 500W runs out — grades and cargo.
They are the same bike — same 750W motor, 720Wh battery, tires and price. Pick SO (step-over) for a stiffer frame if you're taller or ride hard off-road. Pick ST (step-through) if lifting a leg over the saddle is a hassle — shorter riders, seniors, or commuting in work clothes.
Both carry UL 2849 for the complete bike and UL 2271 for the battery — the two certifications insurers and apartment buildings ask about. The 720Wh pack on the ST uses LG 21700 cells. Both ship from a US warehouse within 2 business days with a 2-year warranty.
