24 volt Hilltopper motor front wheel set. Diameter of rim (without tire) 23/5 inches, rim width 1 inch. Essentially untested but when I applied 24VDC the motor twitched. Wheel spins freely.Stars Circle rim made of 6061 aluminum alloy. Note: I do not have motor controller unit so I could not fully test motor .Motor made by Bafang (China).