A tire speed rating is a code or letter associated with a tire that indicates the maximum speed the tire can safely sustain over a prolonged period. The speed rating is determined through laboratory testing under specific conditions.
The speed rating is typically found on the sidewall of the tire, following the tire size specifications. It is represented by a single letter, such as S, T, H, V, W, Y, or Z. Each letter corresponds to a specific maximum speed capability. You can use the table below to find the maximum speed associated with each speed rating letter:
It’s crucial to match the tire’s speed rating with the vehicle manufacturer’s specifications to ensure safe and optimal performance. Keep in mind that speed ratings are usually far higher than legal safe speed limits, and if driving laws are followed, the speed rating shouldn’t affect the everyday driver.
Using tires with a lower speed rating than recommended for your vehicle could pose a safety risk, especially at higher speeds. Keep in mind that the speed rating doesn’t necessarily reflect other performance characteristics of the tire, such as handling, traction, or tread life.
