Compare tyres and find the best price

Choosing the perfect tyre is easy

Tyre bulges: not to be ignored!

Has a bulge formed on the sidewall of your tyre? Find out how to avoid an imminent blowout and a possible accident.

Copyright © All Rights Reserved

How did I end up with this bulge on my tyre?

In fact there are several things which can damage the tyre structure, resulting in a bulge and potentially a blowout. These include (among others) catching your tyre on a kerb, hitting a pothole or an object on the road, as well as chronic under-inflation.

Impact of tyre on the pavement

Crédits photos - © TNPF

This type of impact can damage the textile cords that make up the structure of the tyre, allowing a bulge or bubble to form on the sidewall. At first, you probably won’t notice any air loss, but if you continue driving on the deformed tyre, this will lead to premature tyre wear, which will eventually result in a blowout.

Example of hernia on sidewall of a tyre

Copyright © TNPF

Unlike certain punctures, a sidewall bulge cannot be repaired and you must replace the damaged tyre as soon as possible. 

What about a sidewall indentation?

An indentation on the tyre sidewall is usually a simple cosmetic defect which does not require repair and does not affect tyre performance. It is caused by the welding of cables in the carcass, and only appears when the tyre is inflated, as a result of the pressure.

This type of indentation is commonly found on “radial” tyres (particularly in larger sizes) due to the way in which the metal layers that make up their structure are positioned.

However, if you have the slightest doubt, it’s best not to take any risks: go to your nearest tyre centre as soon as possible and ask a specialist for advice.

Find a specialist near you

Was this advice helpful?

On the same topic

All related topics

Check tyre wear before taking your MOT

It's time to take my MOT

Do you need to pass your MOT soon? Find out more about the tyre checks involved: minimum tread depth, approved sizes, front and rear tyre compatibility etc. Learn how to detect signs of damaged or worn out tyres that could cause your vehicle to fail its test and above all put you at risk.

Tyre puncture

My tyre has a puncture or is damaged

What should you do in the event of a puncture? Find out everything you need to know about spare tyres, their maintenance, the various methods to repair a punctured tyre (puncture repair kit) and the precautions to take when driving on a repaired tyre. Learn also how to detect tyre faults and damage: spot abnormal wear, lumps and cracks…for your own safety!

Do I need to change my tyres?

Do I need to change my tyres?

When should tyres be changed? That is the question many people ask themselves! Learn how to assess tread wear and detect abnormal abrasion or lumps. Get more useful information: find out if your tyres respect the standards of the highway code, find the manufacturing date on tyres, know whether you should change two or four tyres, and understand tyre pressure sensor warnings that help you detect possible punctures. Comprehensive information worth reading from start to finish!

Tyre damage

Defective cracked tyre