All About Tyre Replacement

Four or Two at a Time?

Ideally, all four wheels of a car should be fitted with identical tyres, or at least matching pairs.

Some key points to follow when changing tyres:

Always replace tyres in pairs or all four at once. Tyres on the same axle must be exactly the same: same brand, same tread pattern, same size, same load and speed ratings.
Always prioritise the sizes approved by the vehicle manufacturer (limit modifications, or consult a professional).
Always fit the newest tyres on the rear axle to reduce loss of grip, whether the vehicle is front-wheel drive, rear-wheel drive, or four-wheel drive. Loss of grip at the rear is much harder to control.

BFGoodrich strongly recommends using the tyre sizes approved by the vehicle manufacturer. Changing the tyre size is possible, but in that case it is essential to consult a professional.

Punctures, Repairs, Tyre Wear

It is strongly recommended to check the condition of your tyres once a week. Once a month, check their pressure, tread depth, and look for sidewall damage or any other signs of wear. If in doubt, consult a professional to confirm that your tyres are safe to use.

Five Reasons to Replace Your Tyres

There are five main reasons to replace a tyre. In some cases, a tyre may be repairable, but before any repair, it should undergo a thorough inspection by a professional. Only a professional can confirm that the tyre has not suffered internal damage. Removing the tyre from the rim is essential to accurately assess its condition.

1 – The Tyre is Punctured

In the event of a puncture, your tyre should be inspected by a professional. Only they can confirm that the inner casing has not been damaged in a way that would make the tyre irreparable.

2 – The Legal Tread Wear Limit is Reached

According to traffic regulations:

“A tread wear indicator of 1.6 millimetres marks the minimum legal tread depth.”
“The difference in tread depth between the main grooves of two tyres on the same axle must not exceed 5 millimetres.”

3 – The Tyres Show Signs of Ageing

It is difficult to predict a tyre’s lifespan, which does not depend solely on its production date. Tyres that have been used little or not at all can still show signs of ageing. Factors such as climate, storage and usage conditions, load, speed, inflation pressure, and maintenance can all significantly affect a tyre’s expected lifespan. For more information, see our usage and safety advice.

4 – The Tyre is Damaged

Curbs, potholes, or sharp objects can seriously damage a tyre. Any punctures, cuts, or deformations should be carefully examined by a professional. Only they can determine if the tyre is repairable. As a safety rule, never drive on a damaged tyre or one that has run flat without professional inspection, as only a post-removal inspection can confirm the tyre has not suffered internal damage.

5 – The Tyre Shows Abnormal Wear

Uneven tread wear—whether in certain areas, the centre, or the shoulders—often indicates a mechanical issue such as misalignment, imbalance, suspension, or drivetrain problems. It may also result from incorrect tyre pressure. If you notice any abnormal wear, consult a professional immediately.