Dropout size: 112mm/116mm
The hub rim diameter: 220mm
The whole motor with inflatable tyre is 12 inch, air tyre specification 12 1/2 x 2.75.
This is a 36v 250w or 350w 12 inch brushless hub motor for electric bicycle or scooter.This hub motor is very popular rear motor and also could be used for the front wheel drive. 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/store/72-12-inch-250w-electric-hub-motor.html
The 25ow and 35ow version motor drawing.
We also have a complete ket includes, 12 inch brushless motor, controller,speed throttle, brake levers . Do you like it as follows: