... )44Gear Ratio5:15:1UsageFront Hub motor for electric bicycle,E-motorcycle,Electric scooter ,tricycleRear Hub motor for electric ... bicycle,E-motorcycle,Electric scooter ,tricycleFeatures1. High Efficiency and ... 3. Disc Brake compatible (front and rear, model specific), 7-speed freewheel, standard 135mm axle width for rear, standard 100mm ...