Why Are Tyre Speed Ratings Important?
When it comes to keeping your car in a roadworthy condition, car tyre speed ratings are very important. It is this speed index that determines the top tyre speed and, typically, manufacturer’s carefully select this to match the top performance of your vehicle.
It doesn’t matter, for instance, if your vehicle has a higher speed than the national driving limit of 70 mph. The car itself is capable of driving at faster speeds and, for safety reasons, you should have tyres that can handle the corresponding forces.
Furthermore, it is not permitted to drive at speeds higher than your tyre speed rating, as this can lead to serious accidents on the road. There may be some situations, for instance, where a vehicle has a speed rating below 70 mph - although this is rarely the case with modern vehicles. In such an event, you would have to drive within the tyre’s limits.
Similarly, you cannot equip tyres with a speed index lower than what has been outlined by the vehicle’s manufacturer. On the other hand, you also cannot have a tyre with a rating more than 2 levels higher than the advised index.
Because of these factors, your best option is often to stick with the advised ratings given in the vehicle’s manual. Our tyre speed rating chart allows you to easily achieve this, showing you what each tyre rating is capable of in terms of speed.