1. Look at the pattern
Generally, everyone starts to change tires when half of the pattern is eaten, and since the elasticity of rubber begins to weaken over a few years, the tires are basically changed for 200% safety.
2. Look at the number of holes
All things considered, another indicator of the tire change time of a private car is how many holes it has. If you have pierced more than 3, you can actually change it, especially the tire with injured sidewall.
3. Look at the signs of wear
A wear mark is set at the bottom of all tire tread grooves. Generally, the height of the wear mark of car tires is 1.6mm, and that of truck tires is 2.4mm.
4. Factors affecting tire life
In addition, the service life of tires has a lot to do with the environment in which the car is used. For example, the climate, the driving and parking environment of the car, and the driving habits of the car owner will all affect the service life of the car tires.