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What Do the Numbers in Tire Specifications Mean?

1 Answers

MacAbel

08/28/25 2:56am

The numbers in tire specifications indicate the tire model. The tire model refers to the internationally standardized tire code, usually located on the sidewall of the tire. It includes the width of the tire's cross-section in millimeters (mm), the aspect ratio (a percentage representing the ratio of the tire's height to its width), the diameter of the wheel rim in inches, and the load index. These are the meanings represented by the numbers in tire specifications. Additional information: For example, 185/60-R14-91V is a tire specification where the numbers mean: 185 indicates the tire's cross-sectional width of 185mm, 60 represents the aspect ratio, 14 denotes the rim diameter of 14 inches, and 91 corresponds to a maximum load capacity of 615 kilograms per tire. Besides the numbers, there are two letters: R stands for the tire type (radial tire), and V represents the speed rating. The speed rating indicates the maximum speed at which the tire can carry a specified load under defined conditions, with V indicating a maximum speed of 240 km/h.

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