The tire is the only part of a car that is in contact with the ground. Therefore, the tire is called the shoe of the car, but the tire is not only a pair of shoes, it is also related to the performance of the car in all aspects.

First of all, tires affect the driving safety of cars. Many traffic accidents are caused by tire quality problems or tires losing their ability to work; secondly, tires affect the handling and comfort of vehicles, and vehicle driving is achieved through tires. Therefore, it is true that tires affect the handling of vehicles. The vibration reduction, buffering effect of tires and the transmission function of road feeling will also affect the comfort of the vehicle, including the wind noise generated by the vehicle during driving, which is commonly known as "tire noise", which will also affect the comfort of the vehicle. In addition, tires also affect fuel consumption. Tires can also affect fuel consumption, generally, if the tire pressure is too low, the fuel consumption of the car will definitely increase. Wider tires will increase grip, which is good for sideslip and cornering performance, but wide tires also increase fuel consumption because wider tires increase the rolling friction that the car has to overcome when driving.

But tires are consumables, just like printer consumables, but tires also have a lifespan, and there are three standards for tire replacement:

1. The tire has reached the wear limit, that is, there is a small step in the tire groove at a distance of about 1.6mm high. This is the wear limit mark. The tire pattern wears to the height of this platform, which means that the tire has reached the wear limit. If it is used further, the grip of the tire cannot be guaranteed. It is easy to slip when driving on rainy days;

2. The warranty period is 3 years from the date of manufacture of the tire; after 3 years, the tire rubber will be aged, and all indicators of the aged tire will decline. For safety, even if the tire pattern is still deep, it should be replaced in time ;

3. The sidewall of the tire is found to have a bulge. This is because the cord of the tire carcass structure is broken. If you run at high speed, it is easy to blow the tire.

Under normal driving conditions such as 25,000-30,000 kilometers per year, tires with wear resistance can be replaced at about 70,000 kilometers. If you choose comfortable tires, it is recommended to change them at 50,000-60,000 kilometers. If you can't drive 10,000 kilometers or so a year, it is recommended to replace it in three to four years.