Facebook pixel
Tyres Tyre Speed Rating

What is a Tyre Speed Rating?

The speed rating of a car tyre indicates the top speed that a tyre is able to safely travel at. For both safety and legal reasons, it is crucial to ensure that your tyres are suitable for the speeds you will be travelling at.

Being aware of your tyre speed rating will help you to ensure that your vehicle is safe for use and road legal.

Where Can I See My Tyre Speed Rating?

With such a range of information displayed within your tyre markings, it can seem confusing. However, once you know where to look, it is easy to find out your speed rating for yourself.

The tyre speed rating will be the final letter, found after the wheel size details. For example, if your tyre reads 255/55 R 16 91V, then your tyre speed rating is ‘V’.

speed rating highlight on tyre sidewall

Tyre speed ratings are shown by a letter of the alphabet, with each letter representing a different top speed. The below table shows the max speed for each speed rating:

Speed Rating Max Speed (Mph)Max Speed (Kph)
Q 99 160
R 106170

If you are unsure of what speed rating your car requires, you should refer to the vehicle handbook. To find out more information on what the markings on your tyre mean, see our Tyre Markings Guide.

Why is Tyre Speed Important? 

At high speeds, car wheels will turn faster, generating more friction and therefore more heat. If a tyre’s speed rating is too low, then it will risk tyre failure and loss of control at fast speeds. So, for both your own safety and the safety of other motorists, it is vital to have suitable tyres fitted.

As well as safety reasons, having the correct speed rating is important from a legal perspective. Fitting tyres that have a lower speed rating than the manufacturer’s recommendation can invalidate your car insurance, so it’s worth brushing up on UK tyre law if you’re planning on making changes.

It is important to check your vehicle handbook and ensure that any new tyres match, or even exceed, your car's maximum speed. You should never fit a tyre with a lower speed rating than was originally fitted to your vehicle during production.

Need some advice?

If you’re unsure whether your tyres are the right speed rating for your car, or if you have any other questions about car tyres, get in touch with your local Kwik Fit centre for tons of helpful advice. You can even book a free tyre check to make sure everything’s in tip top shape!

registration plate

Please enter your postcode to see availability information from your local Kwik Fit centre.

Exclusive Online Tyre Pricing

We are committed to offering customers our most competitive tyre prices. Read about our exclusive online tyre pricing.

Locate A Centre

Kwik Fit has over 600 centres across the UK including Northern Ireland, many of which are open 7 days a week for your convenience.


We offer a series of FAQs to help you learn more about our services or your vehicle.

Customer Care

0800 75 76 77
You can reach our customer care team 7 days a week from 9:00am to 6:00pm on Monday and Thursday, 8:30am to 6:00pm Tuesday, Wednesday and Friday, 8:30am to 5:00pm Saturday, and 10:00am to 4:00pm on Sundays and Bank Holidays.