Tire also has lifespan interpretation of national tire scrap standards

The "△" on the tire has special emphasis on the symbols on the tires. For example, the tires on the side of the tires are printed with the tire specifications, trademark and factory name standard wheels, production number and maximum load code. On the shoulder of the tire, a “△” mark is stamped along the circumference of the fifth quarter. What does this symbol mean?



The tire also has a lifetime tire national standard for interpreting it as a tire wear warning signal sign. As we all know, the crown of a car tire not only has to protect the carcass from the impact of the road surface, but also has to maintain a certain adhesion with the ground. Adhesion enables the car to drive, turn and brake. Adhesion enables the car to drive, turn and brake. The higher the adhesion, the more aggressive the steering of the car. Therefore, the size of the tire and the ground directly affects the safety of the car. In addition to the material factors, the tire crown and the surface of the tire tread pattern is also one of the decisive factors.

With the development of highways, the safety of high-speed driving of automobiles has received widespread attention. Vehicle maneuvering stability is a necessary condition for safe driving of vehicles. If the car has good steering stability at high speeds, the tire must have good adhesion, that is, the tire must have a good pattern. Experiments have shown that when the tread pattern wears out, that is, when the tire tread wears to 1.6 mm or less, the slippage of the tire increases significantly, and the braking distance increases sharply. This not only degrades the operational stability of the vehicle, but also often causes traffic accidents.

For this reason, all countries in the world have made corresponding regulations on the wear limits of automobile tires.

The United States stipulates that the wear limit of automobile tires is not less than 1.0mm in groove depth; the Japanese Automobile Tire Association Standard stipulates that the tire wear limit for trucks and passenger cars is 3.2mm, and the tire wear limit for cars is 1.6mm.

China:

China's national standards stipulate that the radial tire tread wear limit is 1.6 mm for passenger cars, and the radial tire tread wear limit for trucks and passenger cars is 2.0 mm, and tire manufacturers must obligately set the wear indicators on the tires in accordance with the standard. When the tread wears to the above limit, the wear indicator should be displayed to remind the driver to replace the tire in time.

The specific approach is: on the tire tread along the circumference of the tire five equal parts (in most countries are) at the bottom of the groove in the pattern, the axial set a high 1.6mm boss. When the tread wears 1.6 mm from the bottom of the groove, the groove begins to break and a clear crack appears. This reminds the driver that the tire must be replaced.

In order to facilitate the check, on the two shoulders where the wear indicator is embedded, the “Δ” mark is printed out with the impression to indicate that the tire wear indicator is set in the tire tread. The tire wear indicator is not only a guarantee for safe driving of the tire, but also serves as a basis for examining whether the tire is normally worn. When the tire wears abnormally, it can be clearly displayed from the tire wear indicator.

The correct use of tires not only can extend the life of the tires, but also is an important guarantee to ensure the safe driving of the car. Therefore, drivers should read the signs on the tires and use them according to their regulations.