centre wheel extension

例句：

1. 1. The new car has a central wheel extension that makes driving more comfortable.
   这款新车有一个中央轮扩展，使得驾驶更加舒适。
2. 2. The engineer used the central wheel extension to adjust the tire pressure.
   工程师使用中央轮扩展来调整轮胎压力。
3. 3.The manufacturer claims that the central wheel extension reduces fuel consumption by up to 20%.
   制造商声称，中央轮扩展可以降低燃油消耗高达20%。