... ,special for 3 and 4wheel vheicle 2.3wheel and 4wheel electric vehicle signle fixed axle motor3.specification: 16inch .10inch and suitable ... any size of wheel 4.hub motor5.high efficiency,less electric power consumption6.large starting power,strong output fuction, stepless ... energy consumping and good creeping slop capacity12.no spark,no electric interference,explosion prevention Size 8''-3.75''/16-3. ...