... ,36V/10Ah 3) Alloy frame 4) Japan 6-gear derailleur Popular Electric bicycle with EN15194Motor of electric bicycleRear drive, 250W, brushless ... or 7 gears,precise and reliable shiftingFrame of electric bicycleAluminum alloyRims of electric bicycleDouble-wall, alloy, Stainless steel spokes, ... free)front light & rear light, front-drive motor, lock, 36V/9Ah Samsung li-ion battery, 36V/9Ah Panasonic li ...