An electric bike can go 40 mph—but that doesn’t mean every electric bicycle should, or that it’s always legal or safe to ride that fast.
What Does It Take for an Electric Bike to Reach 40 mph?
A normal city or commuter e-bike is not built to cruise at 40 mph. To reach that kind of speed you usually need a much more powerful motor, a high-voltage battery, and a controller that lets the system draw big current without cutting out.
Many everyday e-bikes sit in the 250W to 750W range. They feel quick off the line and up hills, but their assisted top speed is kept around legal limits.
A bike that can realistically reach 40 mph under electric power alone is usually running in the 2000W to 3000W zone or even higher, often on a 52V or 72V system.
That is closer to a small electric motorcycle than to a gentle commuter bike.
With a light rider, flat ground, and no strong headwind, a setup like that can push the bike into the 40 mph bracket.
What Kind of Electric Bike Can Hit 40 mph?
One group is high-power “off-road” e-bikes that advertise ratings like 2000W, 3000W or more. They often use big rear hub motors or strong mid-drives, chunky frames, long-travel suspension and wide tyres.
The marketing photos show dirt tracks and forest trails rather than painted bike lanes. In the small print you will often find warnings that they are for off-road use only, because they do not match normal e-bike rules for public roads.
Another group is electric dirt bikes or e-mopeds with pedals. Some of these machines have pedals mostly to pass as “bikes” for marketing.
In practice they ride and feel like light motorbikes. Many of them can reach or pass 40 mph quite easily on the throttle, with pedalling only playing a minor role.
The third group is made up of modified e-bikes. Riders remove speed limiters, flash new firmware into controllers, or install higher-voltage batteries and stronger controllers.
A commuter e-bike that was meant to stop assisting at 20–28 mph can then be pushed well past those speeds.
Modified bikes do make it to the 35–40 mph zone, but they are doing it on frames, wheels, and brakes that were never designed for that load.
Tesway Long Range Electric Bikes Almost Up to 40 mph
Tesway focuses on long range electric bikes for adults, with models like the X7 AWD and X9 AWD that can reach almost 40 mph in ideal conditions while still offering impressive range and easy everyday practicality.
Tesway X7 AWD
Tesway X7 AWD is built for riders who want long range and real speed in one bike. Its 52V 60Ah battery can deliver up to 200 miles of range in ideal conditions, while the 3,600W peak AWD system helps the bike push up to around 38 mph when you really open it up.
That extra power is most noticeable when the bike is loaded close to its 350-pound capacity or grinding up long hills, where it keeps pulling instead of fading out.
Dual suspension and a tall, step-through cargo frame help keep the ride stable and comfortable at higher speeds, whether you are hauling kids, running deliveries, or just blasting home after work.
For adults who want a long range electric bike that still feels confident in the high 35 mph range, the X7 AWD hits a sweet spot between speed, cargo ability, and everyday comfort.
Tesway X9 AWD
Tesway X9 AWD takes that idea and pushes it further, giving you a long range e-bike that can reach up to about 40 mph in ideal conditions.
A 4,000W peak dual-motor system with 240 Nm of torque, 5 pedal assist levels, and a Shimano 7-speed transmission makes the bike feel strong and responsive on climbs, sprints, and fast cruising.
In hill-climb testing, X9 AWD scored a 92% win rate, beating competitors that topped out at 84%, thanks to its wide 26" x 4.0" tyres and smart traction control that help you stay hooked up on steep, loose, or wet ground.
The 48V 30Ah battery supports up to 120 miles of range in ideal conditions, while advanced controller and motor design improve heat dissipation so power stays consistent instead of dropping off as things warm up.
For riders who want serious trail performance, real high-speed capability, and enough range to keep exploring without range anxiety, X9 AWD delivers a powerful, mountain-style e-bike that feels ready for fast off-road rides and mixed city routes alike.
FAQs
Can an e-bike reach 40 mph?
Most stock e-bikes cannot reach 40 mph on the motor alone. They are limited by software and by design to stay around normal legal speeds.
Is 40 mph safe on an electric bike?
Forty mph is only reasonably safe if the bike is built for that speed, you wear proper protective gear, and you ride in suitable places. On normal bike lanes or shared paths, it is far too fast.
What is a good top speed for daily e-bike use?
For everyday riding, an assisted top speed in the 20–28 mph range is usually enough. It feels quick, stays closer to legal limits in many areas, and keeps the risks more manageable.
