load index

Expert advice: what the digits and letters on your tyre sides mean

Tyre sides

If your car suffers one of these you’ll need the characters in the picture below

 

You may never have looked at the writing on your tyre sides. And if you have, there’s every chance you’ll think they’ve been written in another language. But strange as these codes may look, they’re important because if you have a puncture, or your tyres wear out, they give you all the information you need to choose a replacement.

If you look at the side of a tyre, you’ll see characters like 205/55 R16. This is the most basic information you’ll need to tell a retailer if you’re hunting around for new tyres. But other details are vital too. You must choose a load index that is right for your car. Use tyres with the wrong one and you could invalidate your insurance.

The speed rating is important as well. If you have the wrong speed rating and you suffer a tyre failure, you may not be covered by your insurer. You’ll be able to find the correct load index and speed rating for your car in its user manual. Here’s my guide to what the most important characters on your car’s tyres mean. Continue reading