Individual crank arms, which are attached to the chainrings, are what pedals attach to. Ambitious bikers like to choose their chain ring and crank arms according to their own preferences. E-bike cranks are designed specifically to work with E-bike motors.
The most important aspect when purchasing a crank is that the axle mounts fits the bottom bracket. To be on the safe side, it is best to choose models from the same manufacturer and technology. It should also be paid attention to how many chainrings the crank is suitable and which bolt circle standard it has. The length of the crank arms also plays a part and depends on the leg length and riding style of the user.