On the side of the rubber tires, there are various marks molded on the side of tires, which are mainly the marks indicating the specifications and performance of the tires, in addition to the brand and trademark, and these marks are an important basis for the correct purchase and assembly of rubber tires.

Tire wear limit mark

In the process of long-term driving, the tread pattern of the tire will gradually become shallow. If the tread pattern of the tire is worn down, it will weaken or even lose the functions of anti-skid, drainage, and traction transmission. The degree of wear of the rubber tire tread pattern has a direct impact on driving safety.

For this reason, tire manufacturers in the side and shoulder of the junction position (that is, the bottom of the tread groove of the crown), along the circumference of 5 equal parts molded "△" (car tires for "TW1") mark, which is the wear limit of rubber tires mark. Rubber tire tread wear limit is generally 3 ~ 5 mm, when the tire tread wears to this mark, part of the tread groove will appear broken phenomenon, thus reminding users to replace the new tire.

Countries around the world have different regulations on the depth of the rubber tire tread pattern

China provides for truck and bus tires with a tread pattern of not less than 2.0mm, car tires with a tread pattern of not less than 1.6mm.

Japan provides that the tread pattern of truck and bus tires shall not be less than 3.2mm, and the tread pattern of automobile tires shall not be less than 1.6mm.

The United States provides that the depth of the grooves of rubber tire tread shall not be less than 1.0mm.

The meaning of the letters and numbers in the tire markings

Now take the car tire 185/70R1384S as an example, explain the meaning of the letters and numbers in the mark.

185- the width of the rubber tire is 185mm.

70 - rubber tires flat rate (also known as "flat ratio") of 70%. The flat ratio is the ratio of the height of the cross-section of the rubber tire to its width, measured in "%".

R - the type of rubber tire construction. "R" for radial tires.

13 - The nominal inside diameter of a rubber tire is 13in (approximately 33.02mm). The nominal inside diameter of the tire is also the diameter of the vehicle for which the tire is intended.

84-The load capacity index of the rubber tire.84 means that the maximum load capacity of the tire is 5.0kN.

S - rubber tires speed level code.S that the tire can withstand the maximum speed limit of 180km / h. Because the material and structure of rubber tires are not the same, so each type of tire can adapt to the speed of the vehicle is a certain limit. The purpose of setting this indicator is to ensure the safety of driving.

For the sake of driving safety, China GRTAE reminds you to pay attention to the wear and tear of your car's tires in the course of use. If you find that the wear level exceeds the mark, you must change the tires in time to ensure your driving safety.