Gearless motor
In a direct drive hub motor, the axle that passes through the center of the
motor is actually the axle of the motor itself, with the copper windings fiXed
to the axle. This whole axle assembly is called the stator. The magnets
are mounted to the outer shell of the hub motor. When electricity is applied
to the stator a magnetic field is induced that causes the magnets to move.
This in turn makes the whole shell of the motor turn and propels the e-bike
forward.