As an Amazon Associate I earn from qualifying purchases. Links to Amazon on this page are affiliate links.
E-bike classes and peak watts, explained simply
Updated
Your bike's class decides where you can ride it. Many budget bikes sold online are faster or more powerful than the rules allow for bike paths.
| Class | How the motor helps | Motor cuts out at | Usually allowed |
|---|---|---|---|
| Class 1 | Pedal assist only | 20 MPH | Most bike lanes and paths |
| Class 2 | Throttle and pedal assist | 20 MPH | Most bike lanes, many paths |
| Class 3 | Pedal assist only. Any throttle must stop at 20 MPH | 28 MPH | Roads and bike lanes. Often not paths or trails |
Most US states use this three-class system and cap motor power at 750W. Rules vary by state, city and park, so check yours.
Peak watts vs real watts
"2000W peak" is the short burst the motor can hit on a hill start. Many states look at the continuous or nominal rating, which is often 500W to 750W on the same bike. Some, including California, are stricter. A 2000W peak bike is a legal risk in those places. When a listing only shows a peak number, look for the nominal rating in the spec table or ask the seller.
What this means for our picks
- The Jasion EB5 is limited to 20 MPH with a throttle, which makes it Class 2.
- The TST Fat Tire lists 750W nominal and 28 MPH. That is Class 3 speed, but only legal as Class 3 if the throttle cuts out at 20 MPH.
- Very high power bikes such as the EB5 Ultra may be treated as mopeds in some places.
Many bikes let you set a lower speed limit in the display. That helps, but it does not make an over-powered bike legal everywhere. Helmets are a smart idea at any speed and are required for Class 3 riders in some states, which also set minimum rider ages. This page is general information, not legal advice.