If the tire is transposed properly, it can make the tire wear evenly, extend the service life of the tire, and provide better operation performance in the whole life cycle of the tire. For example, if you drive a front car, the front tire will bear most of the force in the load, acceleration, driving, steering, braking, which will lead to tire wear. The wear ratio of front wheel and rear wheel of front car can reach 2:1. In order to ensure the relative service life of the front and rear tires, the tire should be transposed once every 8000 kilometers to 10000 kilometers. If the signs of premature wear and irregular wear are found, the tire transposition frequency should be increased, but the four wheel alignment must be done immediately.