Front drive open size (mm). Rear Rotate drive open size (mm). Rear Cassette drive open size (mm). 20"/24"/26"/27.5"/28"/29"/700C---Optional.
Conversion Kit not include Battery. 1 PCS 500W Hub Motor with Rim and Spokes. 1 PCS 500W Motor Controller.
1 PCS Controller Bag(not battery). Gifts: 1Controller Bag(not battery) + 5Install cable ties + 1stretch film+ 1Installation Manual.Different kits have different specifications of accessories. Specification information is in the main picture.