Tire numbers have specific meanings. For example, the number "225/50R17" on a tire indicates that the tire width is 225mm, the ratio of the section height to width is 50%, and the "R" letter represents a radial tire, while "17" indicates the wheel diameter is 17 inches.

In addition to the model number, tires also have other common data on them, such as the cord material, speed rating, and wheel specifications. The cord material is represented by Chinese pinyin, such as "M" for cotton, "R" for artificial silk, "N" for nylon, "G" for steel, and "ZG" for steel belted nylon. The speed rating represents the maximum speed that the tire can sustain under specified conditions, with letters A to Z representing speeds from 4.8km/h to 300km/h. Common speed ratings include Q (160km/h), H (210km/h), V (240km/h), W (270km/h), and Y (300km/h). The wheel specifications indicate the size of the wheel that the tire is suitable for. For example, a standard wheel size is "5.00F".

The maximum load index number on a tire indicates the maximum load that the tire can carry. For example, the number "91" on a tire indicates a load index of 91, corresponding to a maximum load of 615kg. Different numbers represent different load indexes and correspond to different maximum load capacities. The higher the number, the higher the load index and the maximum load capacity of the tire.

To ensure safety and performance, it is important to understand the meanings of the numbers and other data on your tire. By understanding these numbers, you can choose the right tire for your vehicle and ensure it performs as expected.