A: Electric bikes are designed with compact electric motors which are usually attached to the back of the front wheel and housed in a hub. There are a number of controls with a user interface which is where all the motor operation is done by the rider. Here one can control the speed, braking and other things such as battery management. Some e-bikes have other electric components such as a sensor which also help in geometry and stabilization.
Another important element is the primary user interface or the controls. It should be user-friendly so that the rider can navigate the features easily. A straightforward control panel should not include anything more than a small, digital display with clear readings, ergonomic thumb shifters, and a charging connection. In fact, a thumb shifter is even better than electronic buttons, although some riders may disagree.

E-bikes mostly use motors and battery options from a few major suppliers: Bosch, Yamaha, Shimano, and Brose. A few other brands exist, but are less reliable or powerful. Some, like the Yamaha system, have more torque, and others, like Bosch’s Active Line, are nearly silent. But, generally, all four make good options. Look for motor output (in torque), which will give you an idea of total power. Just like car engines, more torque equals more power off the line and more boost to your pedaling. But watt hours (Wh) is perhaps a more important figure to use—it takes into account battery output and life to give a more accurate reflection of power (higher Wh equals bigger range).
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