Electric bicycle kit 36XF07-AW-F(36V,9AH) 12-28''wheel,24- ... 7-1OKG Electric system MotorFront/rear wheel,light,high speed,brushlessGreat hub motor,16''-28i'' wheel optional.DISC brake optional180w-250w Gear motorfor ... controller systemwhole system for display ,throttle,brakepasnew design controller electric bicycle kit