First of all, look at the car configuration is the kind of valve, the market has rubber and metal materials.Since the valve is an inevitable aging problem of the rubber material, the valve body will gradually crack, deform and lose its elasticity. When the vehicle is running, the rubber valve will also oscillate back and forth with the centrifugal force, which will further promote the aging of the rubber. In general, the life of a rubber valve is 3-4 years, which is similar to the service life of a tire. Therefore, it is recommended to replace the rubber valve together when replacing the tire.
 

　　In order to avoid the aging of rubber valves, metal valves have emerged on the market, and steel valves are one of them. Due to changes in the material, the price of the steel valve is much higher than that of the rubber valve. The service life of the steel valve is two to three times that of the rubber valve, which is mainly due to the fact that the metal material is not easily oxidized. Metal valves also have better air tightness.