The single letter at the end of a tire size, like H, V or W, is the speed rating. It is easy to ignore, but it tells you more about a tire than just how fast it can go.
What the rating means
The speed rating is the maximum sustained speed a tire is built to handle safely when properly inflated and loaded. Common ratings run from Q at the lower end through S, T, H, V, W and beyond, each allowing a higher speed.
Why it matters beyond speed
Higher rated tires usually have stiffer construction and grippier rubber, so they often handle and brake better, even at normal speeds. That is why a sporty car comes with a high rating. It is about capability, not just top speed.
How to match it
Fit tires that match or exceed the rating your car came with. Fitting a lower rated tire can reduce handling capability and may not be legal on some vehicles. Mixing ratings across the car is best avoided.
Frequently asked questions
Can I fit a higher speed rating than standard?
Yes, a higher rating is fine and often grips better. Just keep the correct size.
Does a higher rating wear faster?
Sometimes, because the softer, grippier rubber can wear a little quicker, but it varies by tire.
Match the right tire in our tire guides.
