Know Your tyre speed rating
The speed rating for a tyre is the maximum sustainable speed for a tyre under its recommended load capacity.
Speed ratings are determined through a series of scientific tests during which a tyre is run at speeds in 6.2mph intervals in 10 minute increments until the required speed has been met.
The speed rating for a tyre can be found on the tyre sidewall as a single letter after the load index. Drivers should be advised to never exceed the speed rating and where possible, avoid fitting tyres of a different speed rating. If a tyre of a lower speed rating than recommended by the vehicle manufacturer could invalidate an insurance policy.
Please see the table below to find out the speed rating for each rating symbol:
| Rating symbol |
Speed (mph) |
| B |
31 |
| C |
37 |
| D |
40 |
| E |
43 |
| F |
50 |
| G |
56 |
| J |
62 |
| K |
68 |
| L |
75 |
| M |
81 |
| N |
87 |
| P |
93 |
| Q |
99 |
| R |
106 |
| S |
112 |
| T |
118 |
| U |
124 |
| H |
130 |
| V |
149 |
| W |
168 |
| Y |
186 |
| ZR |
Over 150 |
For more information and to get genuine tyres for your car, contact us at your local Caffyns dealership.