Why change the valve nozzle when you change the tire?

In the long-term operation and high-speed operation of the car, there are often some failures, so the tire failure, when the replacement, the maintenance master will often replace the valve nozzle, why is this?

The main function of the valve nozzle is to inflate and deflate the tire, so as to maintain the air tightness inside the tire, so that it can run for a long time. So if there is usually a tire leakage phenomenon, it is likely because the valve mouth is broken, it needs to be repaired and replaced

Therefore, when replacing the tire, the valve nozzle should be replaced. The valve nozzle can reduce the tire blowout, thus prolonging the life of the tire