In most US states you can ride an electric bike with no licence, registration or insurance as long as it stops assisting at 20 mph, or 28 mph for a Class 3 bike, and the motor is 750 watts or less. Above those limits it stops being a bicycle in law and becomes a moped or motorcycle, which generally means a licence, a plate and insurance. State rules vary, so the thresholds below are the common pattern rather than a guarantee.
This is the question that catches people out after the money is spent. A listing advertises 35 or 40 mph and says nothing about what that speed means legally, and the buyer discovers later that the machine in the garage is not a bicycle at all.
The three-class system
The large majority of states have adopted a common three-class framework for electric bicycles. It is worth learning because almost every rule, from bike path access to minimum age, is written in terms of these classes.
- Class 1: pedal assist only, no throttle, assistance stops at 20 mph. The most widely permitted class, and generally allowed wherever ordinary bicycles are.
- Class 2: has a throttle that can propel the bike without pedalling, assistance stops at 20 mph. Widely permitted, though some trail systems exclude throttles.
- Class 3: pedal assist only, assistance stops at 28 mph. Usually allowed on roads and in bike lanes, but frequently banned from shared-use paths and often carries a minimum age of 16 and a helmet requirement.
Across all three classes the motor is limited to 750 watts. There is also a separate federal definition, used by the Consumer Product Safety Commission for product safety purposes, of a low-speed electric bicycle as having working pedals, a motor under 750 watts and a top speed under 20 mph on motor power alone. That federal definition governs how the product is regulated as a consumer good, not where you are allowed to ride it. Road rules are set by states.
Our full explainer on the classes goes into which one suits which kind of riding.
Where the line actually falls
Two numbers do the work: 28 mph and 750 watts. Exceed either and, in most states, you are no longer riding a bicycle.
What you become depends on the state and the specification. Commonly a moped, a motor-driven cycle, or a motorcycle. Each brings some combination of:
- A driving licence, often with a motorcycle endorsement
- Registration and a licence plate
- Insurance
- A minimum age, typically 16 or older
- A DOT-approved helmet
- A ban from bike lanes and shared-use paths
The awkward category is machines advertised at 30 to 40 mph with 1,000 watts or more, sold as “electric bikes”. They are too fast to be legal e-bikes in most states, but are rarely DOT certified, so they cannot easily be registered as motorcycles either. We flag this directly in our electric motorcycle guide, because one of the machines there falls into exactly that gap.
Speed limiters, and why unlocking is a bad idea
Many e-bikes ship limited to a class and can be unlocked in software to go faster. It is usually easy, often described in forums as a simple menu change, and it is a genuinely bad idea.
- It changes your legal status. If the bike now assists past 28 mph, it is no longer an e-bike, whatever the sticker says.
- It usually voids the warranty, and manufacturers can often tell from the controller.
- It may void your insurance, including home contents cover for the bike itself.
- The brakes were specified for the original speed. Stopping distance rises sharply with speed, and mechanical discs on a heavy bike are marginal at 28 mph before you add more.
If you want to go faster, the honest answer is to buy a vehicle designed and certified for that speed, not to reprogram one that was not.
Rules that vary more than people expect
- Bike path access. Class 3 is excluded from many shared paths. Some park authorities exclude Class 2 as well, because throttles behave differently around pedestrians.
- Minimum age. Commonly 16 for Class 3, often unrestricted for Classes 1 and 2.
- Helmets. Frequently mandatory for Class 3 riders at any age, and for all riders under a certain age.
- Carrying passengers. Permitted only if the bike is designed for it, which matters for cargo bikes.
- Local overrides. Cities, counties and park districts can and do impose stricter rules than the state.
How to check before you buy
- Search your state name plus “electric bicycle law”. Most transport departments publish a plain-language summary.
- Confirm the class the bike is sold as, and the wattage. If the listing avoids naming a class, treat that as informative.
- Check the rules for the specific paths you intend to ride, not just the state rules.
- If the top speed is above 28 mph, assume it is a motor vehicle until you have evidence otherwise, and check what registering it would require.
For the large majority of people, a Class 1 or Class 2 bike is the right answer: no licence, no plate, no insurance, allowed almost everywhere a bicycle is, and quick enough that 20 mph on a bike path already feels fast. Our commuter guide sticks to bikes in that range for exactly this reason.
Frequently asked questions
How fast can an e-bike go without a licence?
In most US states, up to 20 mph for Class 1 and Class 2 bikes, or 28 mph for Class 3, with a motor of 750 watts or less. Above those limits the vehicle is generally treated as a moped or motorcycle and needs a licence.
What are the three e-bike classes?
Class 1 is pedal assist only up to 20 mph. Class 2 has a throttle and also stops assisting at 20 mph. Class 3 is pedal assist only up to 28 mph, and is often banned from shared-use paths with a minimum age of 16.
Do I need insurance for an electric bike?
Not for a bike within the three classes in most states. Once a machine exceeds 28 mph or 750 watts it usually becomes a motor vehicle, which typically requires registration and insurance.
Is it legal to remove the speed limiter on an e-bike?
Unlocking a bike so it assists beyond its class limit generally makes it no longer a legal e-bike, regardless of how it is labelled. It also commonly voids the warranty and may void insurance, and the brakes were specified for the original speed.
Can I ride a Class 3 e-bike on bike paths?
Often not. Class 3 bikes are permitted on roads and in bike lanes in most states but are frequently excluded from shared-use and multi-use paths. Local park authorities can impose stricter rules than the state.
What about e-bikes advertised at 35 or 40 mph?
Those exceed the e-bike classes in most states, so they are not legal e-bikes. They are also rarely DOT certified, which makes registering them as motorcycles difficult. Check what your state requires before buying one.
Keep reading
- E-bike classes 1, 2 and 3 explained
- Best commuter e-bikes
- Electric motorcycles, and why DOT certification matters
- What UL 2849 actually certifies