FYI, hub-drives suck. As do unlawful bikes tearing up Multi Use Paths, Illegal 'bikes,' really electric motorcycles, are not allowed on bike paths, trails, public spaces, or roads. This controller will burn your motor on a sustained climb. This is only a promo seller, and is selling an unsafe and illegal product that will end with you in jail and fined when someone is injured. Advice: Get a mid-drive that is legal and must be pedaled to operate. Torque sensors work like a head snapping Tesla, push the pedal to go. And the pull of the motor can be shifted thru the gears, unlike hub-drives. Both intuitive and smooth. Sure, if you want to attract legal protractions, go ahead and do it, but only on your private Utah ranch to visit your 12 wives. Not in public. Unlawful. Bad.