1.Place of origin:(mainland) 2.rear wheel motor 3.high efficiency 4.good price 5.depends on your requirments specification:10" voltage:64V efficiency:>=82% power:500W-1500W 1.brushless,used for long time(bearing),no need to maintain2.less space and weight,great power,simple construction3.excellent starting performance,no magnet-hysteresis damping energy consumping and good creeping slop capacity4 ...