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What is the speed rating code for car tires?

1 Answers

VanStephanie

07/29/25 9:50pm

Car tire speed rating codes can be divided into 24 different codes from A to Z (excluding I and O grades), with grade A further subdivided into 8 different levels from A1 to A8. Each tire sidewall is marked with this tire's speed symbol (also known as the speed rating), and the corresponding speed symbol indicates the maximum speed of the tire. Here is additional information: 1. Load index: A number corresponding to the maximum load capacity (in kilograms), indicating the maximum weight the tire can bear under normal inflation conditions. 2. Tire width: Refers to the width of the tire (the distance between the two sidewalls, in millimeters). The width of this tire is 185 millimeters. 3. Aspect ratio: Refers to the ratio of the tire's width to its height. "65" indicates that the height of the tire is equal to 65% of the tire's width. 4. Rim diameter: Represents the diameter of the rim used for this tire (in inches). 5. Tread pattern code: Represents the name of the tire's tread pattern.

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