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E-bike Motors - All You Need to Know

E-bike motor power and speed

Before you start looking for the most powerful motor, note that there are different regulations that apply.

In Europe, the max allowed power is 250 kW nominal and 500kW peak power. The assistance speed limit is 25km/h which means that the e-bike will stop providing electric-assist beyond this limit.

In the US, the regulations vary according to the different states, however, the average is a maximum power of 750 kW and a maximum speed of 20 mph (32 km/h) under motor power alone.

There are two types of motors depending on their location - mid-drive and hub. Hub motors can be front or rear.


01 Mid-drive Motors:

Center-drive systems are considered very efficient but are the most pricey and require more regular maintenance. They provide balanced weight distribution that benefits for easier handling of the bike. On the other hand, this configuration can cause more wear to the drivetrain components (chain, cogs, derailleur, etc.)

Suitable for long steep hills. 



02 Front Hub Motors:

Front hub motors are usually the most affordable and are pretty easy to service but have the least torque and power as this placement can’t support a very powerful motor. The location of the motor gives a pulling feeling during acceleration.

Suitable for city rides and relatively easy terrains


03 Rear Hub Motor:

They are more powerful and can be used on different terrains and for all occasions. The great traction and stronger frame mounting provide smooth and intuitive rides. The motor location creates a feeling of push, most similar to riding a motorbike. The more complicated design requires professional service, so don’t try to service them on your own.

Suitable for city rides and more difficult terrains. 


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