What is the main cause of tire wear?

1. High tire pressure

When the tire is used under high air pressure, the contact area between the tire and the road surface becomes smaller, while the pressure increases, which accelerates the wear of the middle tread. When the tire pressure is too high, the stress on the carcass increases, which reduces the tensile strength and elasticity of the cord layer, and it is easy to be punctured by sharp objects, and the carcass may burst when it is subjected to a large impact. In addition, high tire pressure will also reduce the tire's grip ability and extend the braking distance; Affect the comfort and aggravate the wear of chassis parts.

The tire pressure is too low.

Low tire pressure is more harmful to tires. This is mainly due to the increase of sidewall deformation, which leads to excessive alternating stress in the tire cord layer. Periodic compression deformation will accelerate the fatigue failure of the cord. At first, the rubber layer will break, and then the tire will be scrapped prematurely. When the tire rolls under low air pressure, it will aggravate the heating temperature of the tire. When the tire temperature is too high, it will also lead to the local delamination of A carcass, the friction between cords and the temperature at the delamination.

The higher it is, the easier it is to cause side wall blasting; When the tire pressure is low, the middle load of tread decreases and the edge load increases, which makes the shoulder pattern seriously worn. Low tire pressure will not only aggravate tire wear, but also increase rolling resistance and fuel consumption.

3. Tire overload

The characteristics of tire damage under overload are similar to those under low air pressure, but the tire wear and damage caused by overload is more serious. Due to the large deformation of the tire and the excessive stress on the sidewall, the tire material fatigue and strength decrease rapidly, and the cord layer is most likely to break or explode on the sidewall; When an overloaded tire rolls on a stone, a puncture often occurs. Practice has proved that tire life will be reduced by 30% and rolling resistance will be increased by 40% when tire is overloaded by 20%. Overloading inevitably leads to early damage or scrapping of tires.

4. Chassis failure

During driving, the technical condition of some mechanisms of automobile chassis is not good, which is also an important reason for abnormal wear or damage of tires. Among them, the biggest damage to the tire is the inaccurate positioning of the front wheel, especially if the toe-in is too large or too small, which will cause the front wheel to roll and slip, causing serious tread wear on one side and fuzz on the other side. Even if it deviates from the standard, it will lead to eccentric tread wear. The front wheel alignment error not only damages the tire, but also directly affects the steering performance. In addition, abnormal tire wear may also be caused by deformation of frame or suspension, displacement of rear axle, looseness of steering rod ball head or knuckle, excessive wheel bearing clearance, braking delay or locking. Therefore, regular maintenance of vehicle and front wheel alignment, especially steering and braking system, will play an important role in reducing tire wear and prolonging service life.

In addition to the above reasons, another reason for shortening the service life of tires is directly related to the driver, such as: sudden start, sudden acceleration, sudden braking, sharp turning, speeding, improper steering, careless road surface selection, collision with obstacles, and untimely inspection and maintenance.