In the size 205/55 R16 91V, the V is the speed rating. A V-rated tyre is built for sustained speeds up to 149mph (240km/h) in the standard test. Other common letters give a sense of the scale.
Common speed ratings
- Q: up to 99mph (160km/h), often found on winter tyres and some vans.
- S: up to 112mph (180km/h).
- T: up to 118mph (190km/h).
- H: up to 130mph (210km/h).
- V: up to 149mph (240km/h).
- W: up to 168mph (270km/h).
- Y: up to 186mph (300km/h).
Those figures come from the standard rating table. Always use the letter printed on the tyre rather than relying on memory.
Why you must not go below the rating
The speed rating is part of the vehicle's approved specification. A lower-rated tyre may overheat, degrade or fail at speeds the car can reach, even if you never drive that fast. It can also affect insurance and MOT status. You should fit tyres at least equal to the rating recommended by the vehicle manufacturer. A higher rating is acceptable, though it may ride more firmly.
Exceptions for winter tyres
Winter tyres often have a lower speed rating than the summer tyres of the same car. Rules in some countries allow this if a sticker is placed in the driver's view showing the maximum speed. Check the tyre guidance and your vehicle's documents. See winter vs all-season tyres.
Speed rating and driving style
The rating also tells you something about construction. Higher-rated tyres tend to be stiffer and offer sharper handling, but wear more quickly; see performance car tyres. A lower-rated tyre may give a smoother ride and longer wear. Neither is better in general; it is about matching the tyre to the car.
Vans, trailers and special tyres
Commercial tyres often carry a lower speed rating such as N or Q, and trailer tyres have lower ratings still. These should be respected: do not tow or drive faster than the rating permits. See van tyres and caravan and trailer tyres. Space-saver spare wheels are limited to a low speed shown on the wheel.
Mixing speed ratings
Fit tyres of the same speed rating on an axle wherever possible. If the car has different ratings front and rear, because the maker specified so, keep to that arrangement. Mixed ratings can alter handling, and on some vehicles with stability control systems, a mismatch can confuse the electronics.
Finding your car's required rating
The handbook is the best source, and the door frame label sometimes lists it. A fitter can also look up the specification by registration. See how to read tyre sizes for the rest of the sidewall code, and load index for the number before the letter.
Ordering the right tyre
When you call, give the full size with load index and speed rating. Our technicians fit tyres at your location; see mobile tyre fitting and emergency tyre fitting. We work in areas including London, Manchester, Leeds and Watford; check the areas page. Call now for a quote on 0800 772 0355 or book now.
Common myths about speed ratings
One myth is that a higher rating means you can drive that fast legally or safely. It does not: UK speed limits apply regardless, and the rating assumes a tyre in good condition at the correct pressure. Another myth is that the rating says anything about wet grip or braking. Those are shown separately on the EU tyre label, which lists wet grip, fuel efficiency and noise. Compare labels as well as ratings when choosing.
A third misunderstanding is that a tyre loses its rating as it wears. The rating is a design figure, but a worn, damaged, under-inflated or old tyre will not perform to it. A repaired tyre may also carry limits: some repair standards restrict the speed rating of a repaired tyre, and a fitter can explain what applies to your tyre.
Replacement on a car with different front and rear ratings
Some cars, particularly performance models, may be supplied with a higher rating on one axle. If you are changing one pair, match the manufacturer's setup. Where you are unsure, give the registration to the fitter so the factory specification can be checked.
Frequently Asked Questions
What does the V speed rating mean?
The tyre is rated for up to 149mph (240km/h) at its rated load in standard testing.
Can I fit a lower speed rated tyre?
Not below your vehicle's required rating. Check the handbook.
Is a higher speed rating better?
It can be acceptable but may ride firmer and wear faster.
Can you check what my car needs?
Yes. Call now for a quote on 0800 772 0355.
Related Help
Need help with your tyres now?
Call now for a quote, or book now online. Phone 0800 772 0355.