Classes & Power
How fast do ebikes go? Class caps and real-world speed
How fast do ebikes go depends on class: motor assist stops at 20 mph for Class 1 and 2, 28 mph for Class 3. You can pedal or coast past it.
The Data Desk Jul 11, 2026 6 min read
Quick answer
Most ebikes assist to one of two speeds. Class 1 and Class 2 bikes stop helping at 20 mph (about 32 km/h). Class 3 bikes keep helping to 28 mph (about 45 km/h). Those caps are legal limits on motor assist, not the fastest a bike can move. You can pedal or coast past the cap under your own effort; the motor just stops adding power.
Speed is not the same as power. Of the 407 models we track that publish a motor rating, the median is 750 W and 40% run above it. A high wattage does not raise the legal assist speed. Confirm your local caps on the rulebook.
The class caps set the speed
The three-class system defines an ebike by how fast the motor keeps helping. This is the number that matters most.
| Class | Assist type | Top assisted speed |
|---|---|---|
| Class 1 | Pedal-assist only | 20 mph (32 km/h) |
| Class 2 | Throttle plus pedal-assist | 20 mph (32 km/h) |
| Class 3 | Pedal-assist, throttle capped at 20 mph | 28 mph (45 km/h) |
So the honest answer to how fast an ebike goes is a cap, not a top speed. The motor is programmed to stop adding help at the class limit.
Class 1 and Class 2 both stop at 20 mph. The difference is the throttle. Class 3 lifts the pedal-assist ceiling to 28 mph but still caps any throttle at 20.
Assisted speed versus coasting speed
Two speeds get confused. The assist cap is where the motor quits. The coasting speed is whatever physics allows after that.
On a downhill, a rider can roll well past 28 mph. The motor contributes nothing above the cap, but gravity does not care about firmware. Your legs do not either: you can pedal faster than the cap on flat ground and the bike keeps moving.
This is why we do not publish a single top-speed figure for the catalog. A top speed depends on the hill, the rider, and the wind, not on a spec sheet. The number a manufacturer can honestly quote is the assist cap. That is the number the class system regulates.
For most riders on flat roads, the assist cap is the practical cruising speed. You reach it, the motor tapers, and holding more takes real effort.
Power does not set your top speed
Buyers assume a bigger motor means a faster bike. It usually does not. Class caps assisted speed by firmware, whatever the wattage.
Our catalog shows how far motor ratings run past the round numbers.
| Motor rating | Share of the 407 models that publish one |
|---|---|
| Above 500 W | 56% |
| Above 750 W | 40% |
| Above 1,000 W | 26% |
The median rating is 750 W. Half of the rated models sit at or above the figure the US uses to define a low-speed ebike. None of that changes the 20 or 28 mph assist cap.
More watts buy acceleration, hill-climbing, and load capacity. They do not legally raise the speed at which assist stops. We unpack that line in the 750-watt question. To compare motor ratings across models, filter the database.
Speed limits by country
The class caps above are the US model. Other countries draw the line differently, so the legal top assist speed changes with your border.
| Region | Reference standard |
|---|---|
| US federal | 750 W, 20 mph on throttle |
| US 3-class | Class 1 and 2 to 20 mph; Class 3 to 28 mph |
| Canada federal | 500 W, 32 km/h |
Canada’s federal reference caps assist at 32 km/h, roughly 20 mph. That sits below the 45 km/h a US Class 3 bike is built to reach. So a bike sold as Class 3 in the US may not match the Canadian definition.
The class label alone never settles what is legal where you ride. State, provincial, and city rules add age, helmet, and path conditions on top of the speed cap. Check the specifics for your region on the rulebook before you buy.
FAQ
How fast do ebikes go on average?
Most assist to either 20 mph or 28 mph, depending on class. Class 1 and Class 2 stop helping at 20 mph. Class 3 helps to 28 mph. Those are legal assist caps, not a measured average. Actual speed varies with the rider, the hill, and the wind, which is why we publish class caps rather than a single catalog top speed.
Can an ebike go faster than its class limit?
Yes, but not on motor power. The motor stops adding help at the cap: 20 or 28 mph. You can still pedal faster under your own effort, and gravity carries you past the cap on a downhill. The class limit governs assist, not the fastest the bike can physically move.
Does a more powerful motor mean a faster ebike?
Usually not. Class caps assist speed by firmware, whatever the wattage. In our catalog, 40% of the 407 rated models exceed 750 W, yet they still stop assisting at 20 or 28 mph. More power buys acceleration, hill-climbing, and load capacity, not a higher legal top speed.
How fast do ebikes go in Canada?
Canada’s federal reference caps motor assist at 32 km/h, about 20 mph, and 500 W. That is below the 45 km/h a US Class 3 bike targets. So a US Class 3 model may exceed the Canadian definition. Provincial rules add their own conditions. Confirm the caps for your province on the rulebook before riding.
Is 28 mph fast for an ebike?
For pedal-assist, 28 mph is the top tier: only Class 3 bikes assist that high. It closes the gap with city car traffic on open roads. Many jurisdictions treat Class 3 more strictly, with age minimums, helmet rules, and limited path access. The speed is legal in most US states on roads; trails often are not.
The bottom line
An ebike’s speed is a cap, not a top speed. Class 1 and 2 assist to 20 mph. Class 3 assists to 28 mph. Past those points, the motor stops and you are on your own legs or the hill.
Buy for the cap that fits your route. Fast, open roads reward Class 3. Trails and shared paths often bar it, so Class 1 suits them better. Before you commit, check two things: your region’s speed cap and its age and helmet rules, both on the rulebook. Do not shop by wattage: 40% of the models that publish a motor rating already exceed 750 W, and none of that power raises the legal assist speed. For the mechanics of each tier, read ebike classes explained.
