Vehicle tires are circular elastic rubber products that roll on the ground and are installed on various cars or machines. They are usually installed on metal rims, can support the body, buffer external impacts, achieve contact with the road surface and ensure the driving performance of the vehicle. In particular, large trucks and semi-trailer tires are often used under complex and harsh conditions. They are subjected to various deformations, loads, forces, and high and low temperature effects when driving, so they must have high load-bearing performance, traction performance, and buffering performance. At the same time, they are also required to have high wear resistance and flex resistance, as well as low rolling resistance and heat generation. Half of the world’s rubber consumption is used for tire production.
Tire specifications: It is a symbolic data of tire geometric parameters and physical properties. Tire specifications are usually represented by a set of numbers: the first number represents the tire section width, and the second number represents the rim diameter, both in inches. The letters or symbols in the middle have special meanings:
Tire structure: “R” indicates radial tire, “D” and “-” indicate bias tire. Others: “XL” indicates partially reinforced tire, “TG” indicates engineering tractor and grader tire (off-road), and “NHS” indicates off-road tire.
Ply: Ply refers to the nominal number of plies in the tire rubber layer, which is not completely consistent with the actual number of plies and is an important indicator of tire strength. The ply is marked in Chinese, such as 12 ply; in English, such as “14P. R″ means 14 layers.
Cord material: Some tires are marked separately, such as “nylon” (NYLON), which is generally marked after the layer level; some tire manufacturers mark it after the specification, using the first letter of the Chinese pinyin, such as 9.00-20N, 7.50-20G, etc. N stands for nylon, G stands for steel wire, M stands for cotton thread, and R stands for rayon.
Other markings: such as product grade, production license number and other auxiliary marks. Can be used as reference materials and information when selecting fuel-efficient tires. Tire markings are generally more standardized. After clear identification, you can buy and use it with confidence.
The following is a common tire specification representation method:
Example: 185/70R1486H
185: Tread width (mm)
70: Aspect ratio (tire height ÷ tire width)
R: Radial structure
14: Rim diameter (inch)
86: Load index (indicates that the corresponding maximum load is 530 kg)
H: Speed code (indicates that the maximum safety speed is 210 km/h)
Speed code maximum speed (km/h)
C: 60 D: 65 E:70 F:80 G:90 J:100 K:110 L:120 M:130 N:140 P:150 Q:160 R:170 S:180 T:190 U:200 H:210 V:240 W:270 Y:300
Load code limit
80:450kg 81:462kg 82:475kg 83:487kg 84:500kg 85:515kg 86:530kg 87:545kg 88:560kg 89:580kg 90:600kg
