... motor nice design install any size of wheel ,special for 3 and 4wheel vheicle electric scooter motor1.ninecontinent 2.3wheel ... specification: 16inch .10inch and suitable for any size of wheel 4.hub motor5.high efficiency,less electric power consumption6.large starting ... .superior water-proof function9.brushless,used for long time(bearing),no need to maintain10.less space and weight,great power,simple ...