Classes & Power
Ebike Classes Explained: How Power Sets Class 1, 2, and 3
Ebike classes explained with catalog data: how the 3-class model works, why power decides the class, and where 750 W is legal to ride.
The Data Desk Jul 10, 2026 6 min read
Quick answer
E-bikes sort into three classes by top assisted speed. Class 1 (pedal-assist) and Class 2 (throttle) both cut off at 20 mph. Class 3 (pedal-assist) runs to 28 mph. The motor sets the class: its rated power and cutoff speed decide which bucket a bike falls in, and where you may ride it. Of the 407 models in our index that publish a motor rating, the median is 750 W. But 56% exceed Canada’s 500 W federal reference, and 40% exceed 750 W. Many bikes are sold above the class their buyers assume. Check your region’s rules before you ride.
The three-class model, in one table
The class is a legal wrapper, not a spec on the box. North America groups e-bikes by how the motor helps and how fast it will still help you. Two bikes with identical motors can sit in different classes if one uses a throttle and one does not.
| Class | Assist type | Top assisted speed |
|---|---|---|
| Class 1 | Pedal-assist only | 20 mph (32 km/h) |
| Class 2 | Throttle allowed | 20 mph (32 km/h) |
| Class 3 | Pedal-assist only | 28 mph (45 km/h) |
Above the cutoff speed the motor stops adding power. You can still pedal faster on your own. Class decides where the bike is welcome: Class 1 goes almost everywhere bikes go, while Class 3 is often barred from shared paths and carries an age or helmet rule.
Power: the number that sets the class
Motor power and cutoff speed are the two levers that fix the class. A higher rated wattage climbs better and hauls more. It also raises the odds the bike breaks the power ceiling your jurisdiction allows for a road-legal e-bike.
Here is what the shelf looks like. Of the 407 models in our index that publish a motor rating, this is the share above each common ceiling:
| Rated power threshold | Share of the 407 rated models above it |
|---|---|
| Over 500 W | 56% |
| Over 750 W | 40% |
| Over 1000 W | 26% |
The median is 750 W. That single figure hides the spread: more than a quarter of rated bikes carry over 1000 W, which is past the low-speed e-bike definition almost everywhere in North America. A 1000 W machine is often a moped in the eyes of the law, not a bicycle.
One catch: the wattage on the box may be nominal or peak, and the shelf is not consistent about which it prints. A bike labelled 750 W nominal can peak far higher. We pulled that thread apart in The 750-Watt Question.
What the law actually caps
The class model is a US framing, and it is not universal. Numbers differ by country, so read your own region before you buy.
- US federal: a low-speed e-bike is 750 W with throttle assist to 20 mph. Above that, states vary.
- US states: most use the 3-class model in the table above, but path access and age rules are set locally.
- Canada federal: the reference is 500 W and 32 km/h. That is why 56% of our rated catalog sits over the Canadian ceiling in at least one mode.
We do not track a class flag or a throttle flag in the catalog, so we will not claim a class split we cannot compute. What we can say: the power figures above tell you how often the shelf pushes past these caps. The region-by-region specifics, with source links, live in the rulebook.
Why a bigger motor is not a free upgrade
Power trades against three things: legality, battery, and weight. The legal cost is the class jump above. The battery cost is real too. A stronger motor draws more watt-hours per kilometre, so the same pack takes you less far under hard assist.
Our catalog median battery is 749 Wh. The rule of thumb we use across the index: watt-hours divided by 20 gives realistic assisted kilometres, divided by 15 gives the gentlest best case. A 749 Wh pack supports roughly 37 km of hard assist, whatever the range sticker says. That is why the median range claim of 126 km (across the 296 models that publish one) runs so far past the physics. More motor spends that battery faster.
Class also does not decide the frame. A Class 3 label can sit on a commuter, a cargo bike, or a fat-tire machine, and the frame drives price and use more than the class does. We sort the shelf by shape in types of electric bikes.
Reading a listing for its real class
A product page rarely prints the class plainly. Reconstruct it from three fields: assist type (pedal-assist or throttle), the assisted top speed, and the rated wattage. Throttle plus 20 mph is Class 2. Pedal-assist to 28 mph is Class 3. Then check the wattage against your region’s cap.
You can filter and compare those fields directly in the database, and cross-check live prices against the class you actually want in the market report. If you are still choosing among machines, start with the full electric bike buying guide, which puts class first in the decision order.
Frequently asked questions
What is the difference between Class 1, 2, and 3 e-bikes?
Class 1 gives pedal-assist up to 20 mph. Class 2 adds a throttle, also capped at 20 mph. Class 3 gives pedal-assist up to 28 mph, with no throttle in most definitions. Class 1 reaches the most paths. Class 3 is the fastest but is often kept off shared trails and may require a helmet or a minimum age. Confirm the exact rules for your region before you ride.
Does motor power decide the class?
Power and cutoff speed together set it. The class caps top assisted speed, and most jurisdictions also cap rated power for a road-legal e-bike. Of the 407 models we track that publish a rating, the median is 750 W, and 40% exceed 750 W. A motor over 1000 W is usually past the low-speed e-bike definition, which can make the bike a moped in law rather than a bicycle.
Is a 750 W e-bike legal in Canada?
Canada’s federal reference is 500 W and 32 km/h, so a 750 W bike sits above the nominal ceiling. Across our catalog, 56% of rated models exceed 500 W in at least one mode. Provinces and cities apply the details differently, and enforcement varies. Read your own jurisdiction first; the specifics with source links are in the rulebook.
What class is a throttle e-bike?
A throttle that assists you up to 20 mph makes the bike Class 2. If the throttle only works while you pedal, some regions treat it as pedal-assist instead. If the bike will throttle past 20 mph, it usually falls outside the three-class model and may be classed as a moped. Check the assisted top speed on the throttle, not just the pedal-assist top speed.
The bottom line
Buy the class the law allows where you ride, then match the frame to your trips. Reconstruct a listing’s real class from three fields: assist type, top assisted speed, and rated wattage. Treat anything over 1000 W as likely outside the bicycle definition. Confirm the power cap and path rules in the rulebook before you pay, and remember that a bigger motor spends the battery faster. When you are ready to compare machines, the fields you need are in the database.
