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How to Identify Tire Speed Ratings?

1 Answers

DeNatalie

07/30/25 5:48am

Automobile tire speed ratings primarily correspond to the specific maximum speed that the tire can support. Speed ratings are generally represented by letters from A to Z, with higher letters indicating higher maximum speeds. Below are some related extended information: 1. Definition: The speed rating indicates the maximum speed at which a tire can carry a specified load under defined conditions. Different tires will have English letters on their sidewalls to denote their speed ratings. These letters represent certified speed ratings ranging from 4.8 km/h to 300 km/h. 2. Spare Tire: The speed rating for a car's spare tire is M, which signifies a maximum speed of 130 km/h. However, when using a spare tire, it is advisable not to exceed 80 km/h to minimize wear on the drivetrain. Therefore, when using a spare tire, the vehicle's speed should be kept below 80 km/h.

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