Abstract: A cage for mounting a set of pinion gears including: at least two support members disposed about a central axis; first and second axially spaced support arms extending circumferentially about the central axis and connecting the first and second support arms to form a cylindrically-shaped cage having an axially extending central passage. The central passage being coaxial with a wheel axle. The first and second arms and the at least two support members define a first window on one side of the cylindrical cage for receiving a pinion gear and a second window on the other side of the cylindrical cage for receiving another pinion gear. The support arms have axially aligned openings positioned at the first and second windows for receiving radially reduced and opposing heads of each of the pinion gears and supporting rotation of the pinion gears. The cage is mounted for rotation about the central axis.