Abstract: A drive system for a drive wheel of a vehicle having a hub. The drive system includes a frame, a sun gear including toothing on an outer surface, a motor arranged to rotate the sun gear via an output shaft, a revolving circular, a peripheral gear including toothing on an inner surface, and planetary gears interposed between the sun gear and the peripheral gear and engaging with the toothing of the sun gear and the toothing of the peripheral gear. Each planetary gear has a shaft connecting to the hub of the vehicle. A rotatable sleeve shaft surrounds at least a part of the output shaft and has a toothing on an outer surface. The peripheral gear is arranged relative to the sleeve shaft such that the toothing of the peripheral gear engages with the toothing of the sleeve shaft. A clutch/brake element is arranged between the sleeve shaft and the frame for controlling rotation of the sleeve shaft.