1. Look at the pattern
Generally, everyone starts to change tires when half of the pattern is eaten, and because the elasticity of the rubber begins to weaken over the years, they basically start to change tires 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 are pierced. If you have punctured more than 3 tires, you can actually change them, especially if the sidewall is injured.
3. Look at the wear signs
All tires have a wear mark at the bottom of the tread groove, and the height of the wear mark is 1.6mm for car tires and 2.4mm for truck tires.
4. Factors influencing tire life
In addition, the service life of tires is actually very related to the use environment of the car, such as the climate, the driving and parking environment of the car, and the driving habits of the car owner, etc., will affect the service life of the car tire.