Electric bicycles are growing increasingly popular in the US for both recreational and commuter use. Last year, just as many electric bicycles were sold as electric cars. And while e-bikes obviously have a cost advantage compared to electric cars, they also have another important advantage: extreme variety.

There are hundreds, perhaps thousands of different e-bike models available at this point. With everything from inexpensive little 250 W e-bikes all the way up to pricy multi-kW bikes. And one of the most interesting and impressive additions to the high-power end of the spectrum has been the Bafang Ultra mid-drive electric motor.