The hub rim diameter: 218mm
The whole motor with tyre is 12 inch.
This is a 36v 250w 12 inch brushless hub motor for electric bicycle or scooter.This hub motor is very popular rear motor. If is very good to use this electric hub motor to build electric children scooter. You could also buy the 12 inch front wheel without motor. We have also the front 12 inch hub motor which is in the same appearance.
Buy this motor now: http://www.uumotor.com/shop/hub-motor/12-inch-250w-electric-hub-motor
We also have a complete ket includes, 12 inch brushless motor, controller,speed throttle, brake levers . Do you like it as follows: