What about the tire tread warning line?

There is a wear limit mark on the tire. When the tire pattern reaches the limit mark, it is necessary to replace the tire.

One side of the tire is marked with a rubber strip and a block to indicate the wear limit of the tire. When the tire reaches this marked position, it should be replaced in time, otherwise the tire will burst due to insufficient strength. This limit sign is a rubber bump about 5 mm high. In the tire tread, the limit marks of different tires are set in different positions, but they are all in the tread.

Extended data:

1, tire tread plays a great role.

The main function of tire tread pattern is to increase the friction between tread and road surface and prevent wheel slipping. Tire tread pattern is used to improve the grounding elasticity of tread. Under the action of tangential forces (such as driving force, braking force and lateral force) between the tread and the road surface, the tread pattern can produce large tangential elastic deformation, thus enhancing the friction effect.

2. Tire tread pattern depth

If the pattern is too deep, the elastic deformation of the pattern block is large, and the rolling resistance is large, but it is not conducive to the heat dissipation of the tire, and the root of the pattern is easily torn off due to serious stress. Shallow patterns affect its water storage and drainage ability, and it is easy to produce "water skiing phenomenon".

In order to ensure the effectiveness of tread pattern, the wear limit of tire tread pattern is clearly defined. At the same time, the English marks "△" and "TWI" of the tire wear limit warning sign are engraved on several equal parts of the tire shoulder along the circumferential direction. When the wear distance from the convex surface of the block to the bottom of the groove is about 1.6 mm (116 inch), the pattern at the mark has been smoothed, thus exposing a horizontal narrow strip with smooth tread to warn the driver that the tire should be replaced.

Baidu Encyclopedia-Wear and Wear Signs

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