Quick Facts About Hub and Mid-Drive Motors

The most common electric motor bikes are 250W mid-drive motors and 750W hub drives. These are tried and tested eBike motor designs, and most riders would be pleased with either one.

Of the two,as the electric bike kit, a 750W eBike hub motor is the most popular for its low price. These are typically placed in the rear wheel’s hub (although front wheel hubs are available), turning the wheel independent of the drivetrain.

Important Information to Keep in Mind

The legal eBike power limit in most US states is 750W* (anything above that needs a license/registration to ride on the road).

Legal maximum eBike speed in the US is limited to 28mp/h (Class 1/2 – 20mph, Class 3 – 28mph).

The legal limit in the US is 750W  / 250W in the EU.

750W = 0.75KW = 1hp = 1 horsepower

Wattage does not equal power.

The controller regulates the power from the battery to the motor (36V < 48V)

750W = nominal power (different to peak power)

250W mid-drive motors are most common on higher price e-bikes, lightweight performance bikes used for climbing or technical terrain, and those designed for long-distance riding.

The electric bike conversion kit provide a smooth, natural ride feel as the motor connects to the gears and the cranks, and the torque sensor adjusts the motor’s power to match your power seamlessly.

This connection also results in a more extended battery range, specifically when riders use the entire gear range, as the motor only provides power when needed. Finally, these bikes handle better thanks to the motor’s weight being in the center of the bicycle.

Although technically inferior, the 750W hub motor is hugely popular for three reasons:

Low price

Doesn’t rely on the drivetrain (and wear down the chain)

Performs perfectly for most riding

These reasons result in the hub drive (specifically 750W models) coming on many e-bikes like city and commuters.

When the total weight and weight distribution aren’t an issue, you can depend on these independent motors to provide plenty of power and deal with most terrain effectively. Additionally, the drivetrain will last longer, reducing maintenance costs in the long run.

Depending on the motor type or intended use, the watts you need will vary.

250W is enough for almost any mid-drive e-bike (except hunting e-bikes). However, a 250W hub motor will only provide enough power for flat to light gradients, suitable for cruisers or basic commuter e-bikes.

• 250W hub motor – cheap cruisers & city bikes
• 250W mid-drive motor – most electric motor bike styles
• 350W hub motor – affordable commuter eBikes
• 500W hub motor – commuter & city eBikes
• 750W hub motor – most eBikes types
• 1,000W mid-drive motors – hunting Bikes