E-BIKES ยท EXPLAINER
The short answer
Class 1 is pedal-assist only, motor cuts out at 20 mph. Class 2 adds a throttle, still capped at 20 mph. Class 3 is pedal-assist up to 28 mph, with no throttle assist above 20 mph in most states. Class 1 has the widest access to bike paths and trails. Class 3 is fastest for road commuting but the most restricted on shared paths. Choose based on where you will actually ride.
Class 1: pedal-assist to 20 mph
The motor helps only while you are pedalling, and stops assisting at 20 mph. There is no throttle.
Class 1 is the most widely accepted category. Because it behaves most like a conventional bicycle, it is typically allowed wherever regular bikes go, including many multi-use paths and natural-surface trails that restrict other classes. If your route depends on a trail network, or you want the fewest access headaches, Class 1 is the safe choice.
Class 2: throttle to 20 mph
Everything Class 1 does, plus a throttle that moves the bike without pedalling, capped at 20 mph.
The throttle is genuinely useful in specific moments: pulling away from a standstill on a hill, getting across a junction briskly, or moving a heavily loaded cargo bike. It is also valuable for riders with limited mobility or knee problems, for whom a throttle is the difference between cycling and not.
The catch is access. Because a throttle makes the bike closer to a moped in some regulators’ eyes, Class 2 is restricted on more trails than Class 1.
Class 3: pedal-assist to 28 mph
Pedal-assist that keeps helping up to 28 mph. Class 3 bikes are generally required to have a speedometer, and many jurisdictions set a minimum rider age or require a helmet.
For road commuting, Class 3 is the meaningful upgrade: the difference between 20 and 28 mph noticeably shortens a longer commute and helps you keep pace with slow urban traffic, which can feel safer in a lane. The trade-off is the most restricted path access of the three, and higher speed demands more of your brakes and your attention.
Where each class is allowed
This is the part that trips people up: the rules vary by state, and often by city, county, or even individual park. Most US states have adopted the three-class framework, but what each class may do differs.
Some common patterns: bike lanes on roads generally allow all classes; paved multi-use paths often allow Class 1 and 2 while restricting Class 3; natural-surface and mountain-bike trails are the most restrictive and frequently allow Class 1 only, if any. National and state park rules differ from local rules.
What to do about it: before buying, check the rules for the specific paths on your route. Look at your state’s DMV or transportation department, your city’s parks and recreation pages, and the managing agency for any trail you plan to use. Ten minutes of checking beats buying the wrong class.
Which class should you buy?
- Your route uses trails or multi-use paths: Class 1, for the widest access.
- You want throttle help for hills, starts, or mobility reasons: Class 2, and check your local path rules.
- Road commuting, longer distance, keeping up with traffic: Class 3.
- Hauling a loaded cargo bike: a throttle is genuinely useful for getting moving, so Class 2 capability is worth having.
Worth knowing: many bikes are configurable, and some ship as Class 2 with the ability to unlock Class 3 performance in the app. Check what the bike is set to out of the box and what it can legally be set to where you live.
The classes in detail
Class 1: pedal assist to 20 mph
The motor only helps while you are pedalling, and it stops helping at 20 mph. There is no throttle. This is the class with the fewest restrictions anywhere: if bicycles are allowed, a Class 1 e-bike almost always is, including on mountain bike trails and shared paths where other classes are excluded.
It is also the class that feels most like a bicycle, because the bike does nothing you do not initiate. If you are unsure which class you want and you are a confident cyclist, this is the safe default.
Class 2: throttle, still capped at 20 mph
Adds a throttle that moves the bike without pedalling. Same 20 mph cap. The throttle matters more than it sounds for three groups: riders with knee or hip problems who need help starting from a stop, anyone carrying heavy loads uphill, and riders in stop-start traffic where getting a loaded bike moving from standstill is the hardest part.
The trade-off is access. Some trail networks and park authorities exclude throttle-equipped bikes even at the same speed, on the reasoning that throttles behave less predictably around pedestrians.
Class 3: pedal assist to 28 mph
Pedal assist only, but the motor keeps helping up to 28 mph. This is the commuter class, and it makes a genuine difference on longer road routes where 20 mph feels slow. It also carries the most restrictions: frequently banned from shared-use paths, commonly a minimum age of 16, and helmets are often mandatory regardless of age.
Many Class 3 bikes are required to have a speedometer, which is a small detail that tells you something. Once a bike is quick enough to need one, it is being treated more like a vehicle than a bicycle.
Why 750 watts appears everywhere
All three classes share a 750 watt motor limit. That figure comes from the federal definition of a low-speed electric bicycle used by the Consumer Product Safety Commission, which sets how the product is regulated as a consumer good.
It causes confusion because manufacturers advertise peak wattage, not nominal. A bike listed as “1200W peak” may well have a 750W nominal motor and be entirely legal. A bike listed as “1500W” with no qualifier probably is not. When a listing gives one number without saying whether it is nominal or peak, that ambiguity is usually doing work.
What changes between states
The three-class system is a model law adopted by the large majority of states, but adoption is not identical everywhere. The details that vary most:
- Which classes are allowed where. Path and trail access is the most common difference, and it is often set locally rather than by the state.
- Minimum age. Usually 16 for Class 3, often unrestricted for Classes 1 and 2.
- Helmet rules. Frequently mandatory for Class 3, and for younger riders on any class.
- Labelling. Many states require a permanent label stating class, top assisted speed and motor wattage. A bike without one may be harder to defend if questioned.
- A few states have not adopted the system at all, and treat e-bikes under older moped or bicycle definitions instead.
Which class should you buy?
- Riding mostly on shared paths and trails: Class 1. It has the widest access and you will not have to check rules at every park boundary.
- Short urban trips, hills, or a loaded bike: Class 2. The throttle earns its place at junctions and on starts.
- Road commuting over about five miles: Class 3, provided your route does not depend on shared paths.
- Carrying children or cargo: Class 1 or 2. Path access and lower speeds both matter more when the load is precious.
One practical note: many bikes ship as Class 2 and can be set to Class 3 in the display menu, or the reverse. If you buy one of these, set it to the class that matches where you actually ride, and remember that raising it changes the rules that apply to you.
A word on labels versus reality
A bike is not the class its listing claims. It is the class its actual behaviour puts it in. If a bike assists past 28 mph, calling it Class 3 does not make it one, and that distinction becomes real the moment there is an insurance claim or a police stop. We cover where that line sits in how fast an e-bike can go before you need a licence.
Frequently asked questions
What is the difference between Class 1, 2 and 3 e-bikes?
Class 1 is pedal assist only up to 20 mph. Class 2 adds a throttle and is also capped at 20 mph. Class 3 is pedal assist only but keeps assisting up to 28 mph, and is more heavily restricted on shared paths.
Which e-bike class is best for commuting?
Class 3 if your route is mainly roads and bike lanes, because 28 mph makes a real difference over distance. Class 1 or 2 if your commute uses shared-use paths, since Class 3 is often banned from them.
Do all states use the three-class system?
Most do, but not all, and the details differ. Path access, minimum age, helmet requirements and labelling rules vary by state and often by city or park authority. Check your state transport department and the specific paths you ride.
Can a Class 3 e-bike be ridden on bike paths?
Often not. Class 3 bikes are generally allowed on roads and in bike lanes but are frequently excluded from shared-use and multi-use paths. Local authorities can be stricter than the state.
What does 750W mean for e-bike classes?
All three classes share a 750 watt motor limit, taken from the federal definition of a low-speed electric bicycle. Listings often advertise peak wattage instead of nominal, so a bike described as 1200W peak may still be legal with a 750W nominal motor.
Do I need a licence for a Class 3 e-bike?
No, in most states. Class 3 stays within the electric bicycle definition, so no licence, registration or insurance is required, though minimum age and helmet rules commonly apply.