A reduction drive assembly includes a spindle that defines an aperture and a motor output shaft extending through the aperture. The reduction drive assembly includes an output hub and a planetary gear assembly. The planetary gear assembly includes a ring gear fixed to the output hub, a first stage sun gear coupled to and driven by the motor output shaft, a second stage sun gear, a planetary gear carrier engaged to the second stage sun gear, first stage planetary gears each of which is supported by a respective support pin of the planetary gear carrier and meshed with the first stage sun gear and the ring gear, carrier pins extending from a first end of the spindle, and second stage reduction gears each of which is rotationally mounted on a respective one of the carrier pins and is meshed with the second stage sun gear and the ring gear.