California Passes Two More E-Bike Laws, Increasing Safety
Written by: Rémy Rossi | August 5, 2025 | Time to read 4 min
New e-Bike laws in California aim to increase safety, requiring rear reflectors or lights and banning app-facilitated top speed hacks.

More about the Author: Remy Rossi
Rémy Rossi is a bike writer, mechanic, and educator who got his start in community-based bike shops and co-ops. With a decade in the industry, he still wrenches on bikes when he can and plays bike polo on a fixie.

California is playing catch-up
This type of approach isn’t new for California legislators, who recently tightened up the definition of a Class 3 e-Bike to keep bikes squarely within the three-class system— and crack down on too-fast or unlocked electric bikes. And considering the skyrocketing popularity of electric bikes across the state, frequent updates are necessary to ensure that there’s proper regulation.
Governor signs two new e-Bike bills

Bill AB 545 received a small tweak or technical clarification regarding the rules against modifying the top speed of electric bikes. An existing law prohibits tampering with an e-Bike to bypass its speed limit (according to the three-class system), but the recent change also makes it illegal to exceed the maximum speed via an app. Class 1 and Class 2 e-Bikes can assist up to 20 mph, while Class 3 e-Bikes can travel up to 28 mph.
Some e-Bike manufacturers include apps that allow riders to “unlock” their e-Bikes to reach speeds beyond the class designation, and other third-party apps may also work to the same effect. This way, all electric bikes sold in the state of a specific class will maintain that designation and keep electric bike top speeds at their legal limits.

Southern California “e-Bike” crackdown
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Key Takeaways
- California passed AB 544, requiring a bright rear red reflector or light on e-Bikes for improved nighttime safety.
- California bill AB 545 now explicitly bans using apps to unlock e-Bikes beyond their legal speed classes.
- Recently, authorities in Southern California have been cracking down on illegal high-powered electric vehicles that fall outside e-Bikes’ legal definitions.