What does the speed rating of vehicle tires mean?

[StMartin]

Vehicle tire speed rating refers to the maximum speed at which a tire can carry a specified load under defined conditions. Below is a detailed introduction to the specifications of car tires: 1. Specification model representation: Tires are important components of a car, and there are many specification models for tires, with different models suitable for different types of vehicles. The specification model identification is usually on the sidewall of the tire, represented by a series of alphanumeric characters, corresponding to the tire's tread width, aspect ratio, type, rim size, load index, and speed rating. 2. Speed rating: Depending on the maximum speed they can withstand, tire speed ratings can be divided into different grades from A to Z, with grade A further subdivided into eight different grades from A1 to A8. The further back the letter representing the tire speed rating is in the alphabet, the better the tire's performance.