Do you know what these letters and numbers mean?

On many heavy truck tires, you can see 275/80R22.5, 295/60R22.5 and other logos. Many light trucks and micro trucks will have 185R15LT 6PR, 175/75R14LT 8PR and other logos. Do you know what these alphanumerics mean?

"R" stands for radial tire (radial tire), which is a structural form of tire. It is different from bias tire. Its advantages are low tire temperature, fast heat dissipation, strong load-bearing capacity, and the tread is not easy to puncture and puncture. Long life. The number after the letter R represents the diameter of the wheel hub. 14-inch tires actually mean that the diameter of the wheel hub is 14 inches.

"LT" is an abbreviation for (light truck), which refers to light truck tires. According to the classification of cars to distinguish, in this classification of other tire models: PC: car tires. TB: Truck and bus tyres. AG: Tyres for agricultural vehicles. OTR: Engineering vehicle tires.

8PR represents the tire level, which is the load index of the tire, 8 is the number of tire ply layers, PR is the English abbreviation of the level, the level can be understood as the tire frame, the larger the number, the higher the tire strength, but the level is not exactly the same as the actual ply layer.

The tire meets the DOT standard, usually followed by a string of 7-digit letters, indicating the identification number or serial number of the tire, and the last four digits of the serial number represent the production date of the tire. The production date of the tire is composed of four digits "AABB", "AA" means the week of the year, and "BB" means the year.

Anyone who knows the business knows that the market for truck tires and passenger car tires is very different.

The passenger car tire market is still dominated by major international brands, Michelin, Goodyear, and Horse Brand, while the truck tire market is more dominated by domestic tires. People are more familiar with Chaoyang tires, Linglong tires, Double Star tires, Triangle tires, Huili tires, Chengshan tires, etc. Have you ever paid attention to what brand of tires your car is equipped?

These types of tire problems are the most common. Have you encountered them?

Tires are easy to wear parts, and various problems will inevitably occur during long-term use. There are normal wear and structural damage. Don't panic if there is a problem, look for the reason first!

In daily driving, 80% of tire problems come from the sidewall. The most common is that the sidewall is stabbed by a sharp sharp weapon, or when twins are used together, there is a foreign body between the two tires to squeeze and cause the sidewall to puncture.

The vast majority of tire bulges are caused by accidental strong impact on the tires during driving, which causes the cord to break and cause tire bulges. It is possible that during driving, the tire shoulder or the bead near the shoulder may strongly impact external foreign bodies, such as potholes, curbs, and large stones. Once the tire bulges, it needs to be replaced in time, otherwise it is very dangerous.

There is also a case of irregular tire crown wear, which is due to the tire is not regularly transposition, poor vehicle condition, directional tire is not regularly installed, the rim is not appropriate, the enterprise is not normal and other factors.

The sidewall fan-shaped blasting occurred because the tire crown was stabbed and the carcass ply was stabbed, resulting in cracks in the carcass ply from the inside to the outside, which burst from the cracks under the action of pressure.

Sharp objects stab the belt steel wire of the tire crown, causing water, ash, sand and other infiltration. If the user fails to check and deal with it in time, the belt end point will rust and delaminate.

When driving on a bad road, the tread is cut by a bad sharp weapon, or the crown rubber is scratched, which may easily cause the groove to crack or the crown rubber to fall off.

The tires are overinflated. In order to improve the cargo capacity of the car, some drivers like to exceed the standard pressure of the tires when inflating. Who knows that this will speed up the wear of the tires, thereby increasing the possibility of a puncture.

If the tire pressure is too low, the deformation of the carcass will increase. If the tire pressure is too low, when the heat caused by the deformation of the carcass accumulates to a certain extent, it will cause the tire to age and affect the life of the tire. In severe cases, it will also cause a puncture.

Finally, regarding the maintenance of tires, the old driver has a few simple pithy words: "if you have nothing to do, get off the bus and observe more. if you have any problems, don't delay in handling them. If you want to change as much as possible, you should choose the same specifications for the full set of tires. Exchange diagonal tires to prevent eccentric wear, stop for heat dissipation, and be careful of foreign matters on the road. Tire overload is the most dangerous".