Various logos on tires

Tire specifications: Tire specifications are often expressed as a set of numbers, with the previous number indicating the width of the tire section and the latter indicating the diameter of the rim in inches. For example, 165/70R14 means a tire width of 165 mm, a flatness of 70, and a rim diameter of 14 inches. The letters or symbols in the middle have special meanings: "X" means high pressure tires; "R" and "Z" means radial tires; "1" means low pressure tires.

Level: Level refers to the nominal number of layers in the tire rubber layer, which is not exactly the same as the actual number of layers. It is an important indicator of tire strength. The level is marked in Chinese, such as 12 levels; in English, such as "14P.R" is 14 levels.

Rim Specifications: Indicates the rim specifications for use with tires. Easy to use, such as "standard rim 5.00F".

Speed class: The maximum speed at which a tire carries a specified load under specified conditions. Letters A through Z represent certified speed grades for tires from 4.8 km/h to 300 km/h. Commonly used speed grades: Q: 160km/h; R: 170km/h; S: 180km/h; T: 190km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/ h; Z: ZR speed is higher than 240km/h.

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