What is the tire speed rating symbol?

[McAndres]

The tire speed rating symbol is located on the tire and is usually represented by letters, with different letters indicating different speed limits. Here is more information about the markings on tires: 1. A series of letters will be printed on the sidewall: For example, 245/45R18, which is a common tire model. 245 refers to the tire width, usually expressed in millimeters. The larger this number, the wider the tire. 45 refers to the aspect ratio of the tire. The smaller the number, the flatter the tire appears. This value is usually expressed as a percentage. R stands for radial tire, and 18 represents the rim size. 2. The set of numbers following the tire size: These represent the load index and speed rating of the tire. Different letters correspond to different speed limits. Q represents a speed limit of 160 km/h, R represents 170 km/h, S represents 180 km/h, T represents 190 km/h, H represents 210 km/h, V represents 240 km/h, W represents 270 km/h, and Y represents 300 km/h. The specific speed limits can be referenced against standard values.