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Help > Tyres > What is tyre speed rating?

What is the tyre speed rating?

The speed rating of a tyre is displayed on the sidewall. You will find it at the end of the tyre's size. It is always represented by a letter - in the following example the tyre speed rating is "V".

Tyre Speed Rating

 

Speed ratings are based on tests in which engineers run the tyre at 6.2 mph steps, in 10 minute increments, until the required speed has been met.

Why is the tyre speed rating important?

The faster you are travelling, the faster your wheels and tyres rotate. This can create a lot of heat as the speed increases. This is why choosing tyres with the correct speed ratings according to your vehicle is very important. To ensure they have been designed for the suitable usage.

What difference does tyre speed rating make?

Despite the name, the speed ratings are not only about speed. The speed rating also gives an indication as to the tyre's comfort levels, rate of wear, traction, and performance when cornering.

For example, tyres which hacve been developed to produce a high speed rating are generally better equipped to deliver better grip and braking - however their durability and winter weather performance may not be as strong as tyres with a lower speed rating.

Tyre Speed Rating Table

The following is a table which notes each car tyre speed rating and the the maximum speed each rating:

Speed rating Mph
N 87
P 93
Q 99
R 106
S 112
T 118
U 124
H 130
V 149
Z 150+
W 168
Y 186