Fitting Bigger Wheels and Tyres

Swapping to a larger than standard wheel and tyre package can work wonders for your car's looks and could improve its roadholding. But before you take the plunge read our guide on how to do the job right. We've also included a crucial conversion table that will enable you to check the circumference of your original wheels and tyres and find which alternative sizes will match it.

Upgrading your tyre and wheel package is a fun thing to do, but you should bear in mind that just because a wheel/tyre combo matches the circumference of your original equipment, don't assume the new package will, too. Start off by mounting one tyre onto a wheel and then check for the following at all four corners of the car.

Does it rub against the wheelarches?

Try loading your car heavily then look to see if the tyre still clears the wheelarches. Make sure that the tyre doesn't rub against any part of the wheel arches and that it can turn freely. Remember, the tyre mustn't stick out further than the wheelarch; it's against the law.

And what about with some weight on board?

Try loading your car heavily then look to see if the tyre still clears the arches.

Does it touch the suspension or chassis?

If the tyre snags on the suspension or chassis rails it could interfere with your car's ride and handling, not to mention lead to a potentially dangerous tyre failure.

Could it affect the steering?

Put the steering on full lock in both directions, and with the tyre fitted on both sides of the car. Anything that hampers your car's steering could be lethal and is certainly illegal.

Is it clear of the brakes?

Make sure the tyre or wheel doesn't rub against or get tangled with the brake pipes or callipers, including the handbrake mechanism. You don't need us to tell you how important your brakes are.

Are the load and speed ratings a match for your original tyres?

Always fit a tyre with the same, or higher, load and speed ratings as your original fitment tyre; if you're in any doubt, ask your local Avon dealer for advice. Never take chances.