1. The influence of tire tread depth
The deeper the pattern, the greater the elastic deformation of the block on contact with the ground, and the rolling resistance formed by the tire elastic hysteresis loss will increase accordingly. Deeper patterns are not conducive to the heat dissipation of the tires, so that the tire temperature rises faster, and the roots of the patterns are easy to tear and fall off due to severe punishment. Too shallow pattern not only affects its water storage and drainage capacity, and is prone to harmful "water skiing", but also makes the shortcomings of light-tread tires easy to slip, which makes the aforementioned car performance worse.
2. The pattern is too deep or too light.
Therefore, too deep or too shallow the pattern is not good. The objective law is that the pattern will become smaller and smaller in use. In order to ensure the effectiveness of the pattern, countries around the world have formulated clear regulations on tire pattern wear limits. And die-engrave the tire wear limit warning mark "" or (and) "TWI" in English at several equal parts along the circumference of the tire shoulder. When the convex surface wear distance of the pattern block is about 1.6mm (1/16 inch) to the bottom of the pattern groove, the pattern at the mark has been smoothed out, so a narrow horizontal strip of light tread is revealed to warn the driver that the It's time for the tires to be replaced