Bionx system on a med/large frame new hybrid bike. Has been well looked after . Reaches speeds of 40 km/hr using throttle only on flats. Everything works perfectly. This is a very fresh rebuilt battery... only 30 ish charges on it ... can go 25km-30km with little pedal assist on one charge. Motor BionX original CANBus 350 Watt for 700c / 29" wheels. For BionX G1 systems only. Battery 48v 6Ah Comes with charger, saddle bags, bell, lights