Please see the example below for California Classification:

• Class 1: The bicycle is equipped with a motor that provides assistance only when the rider is pedaling, which ceases to assist when the ebike reaches 20 mph.
• Class 2: Bicycle equipped with a throttle-actuated motor that ceases to assist when the ebike reaches 20 mph.
• Class 3: The bicycle is equipped with a motor that provides assistance only when the rider is pedaling, which ceases to assist when the ebike reaches 28 mph.

Please click HERE for Ebike laws and classification (regarding helmets, age restrictions, etc.) for every state!