back wheel

例句：

1. 1.The car's back wheel was damaged in the accident.
   汽车的后轮在事故中受损。
2. 2.The driver had to change the back wheel on the road.
   司机不得不在路上换后轮。
3. 3.The new model has a more powerful back wheel.
   新款模型拥有更强大的后轮。