How long should tyres last? How do I find out the tyre manufacture date? What is a tyre’s DOT code? Get answers to all these questions and more, with our guide.

 

Your tyres are arguably the single most important safety component on your vehicle - because they are the only part of your car that touches the road. If they fail, there could be serious consequences.

 

So - before tyres wear out, can they expire?

In short - yes. As they age, tyres become weaker and more brittle (without taking into account any wear from use) - meaning they’re not as safe to use as they once were.

Tyres are primarily constructed from rubber, although various other compounds are also added - including carbon black or silica, steel reinforcement meshes, and chemicals - all of which slow the ageing process. However, these added materials only slow the ageing process, they do not stop it.

Rubber naturally degrades over time due to exposure to oxygen, heat, sunlight (UV), and ozone. As tyres age, the rubber can harden and lose flexibility, reducing grip and increasing the risk of cracking or, in severe cases, failure.


How do I know my tyres are too old to continue using?

These visible signs could mean your tyres need to be replaced:

  • Cracks in the sidewall or tread.
  • Bulges or blisters.
  • Hard, brittle rubber.
  • Uneven wear or persistent vibration (though these can also have other causes).

 

How long tyres last: A rough guide

When it comes to how long should tyres last, there isn’t a single commonly-agreed-upon time when a tyre expires. However, here are some rough guidelines on tyre expiry dates:

  • After about 5 years from tyre manufacturing date: Tyres should be inspected annually by a qualified tyre professional.
  • At around 10 years from the tyre manufacturing date: Most manufacturers state that their tyre should not be driven on after this period - although some specialist tyres can be driven on for longer.

How to check your tyre's age: Tyre DOT code

Look for the tyre DOT code stamped on the sidewall. The last four digits indicate the week and year the tyre was manufactured.

For example:

  • 2322 = manufactured in the 23rd week of 2022.
  • 0519 = manufactured in the 5th week of 2019.

 

Can tyres "expire" while in storage?

If tyres are stored in a cool, dark environment, they are likely to age much more slowly than if they are kept outside and/or driven on regularly. However, even tyres kept in darker, cooler conditions will age over time.

 

Bottom line

A tyre with 6 mm of tread but 12 years of age may be less safe than a 4 mm tyre that's only 3 years old. Safe tyre condition depends on both tread depth and age, along with proper inflation, storage, and maintenance.

If you’re unsure whether your tyres are still roadworthy. Have them looked at by a professional, who will tell you they need replacing.