... accept a 6 speed freewheel which makes it more difficult to integrate the motor into a standard bicycle and can be dangerous ... :15:1Usage Front Hub motor for electric bicycle,golf cart,ATV etc.Rear Hub motor for electric bicycle,golf cart,ATV etc.Features1. High ... . Disc Brake compatible (front and rear, model specific), 7-speed freewheel, standard 135mm axle width for rear, standard 100mm axle width ...