When to Replace Tyres: Key Signs to Look For

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 by Chesca D
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Chesca D is a Content & Editorial Coordinator at Tyres.co.uk and is responsible for researching, coordinating, and producing accurate, up-to-date tyre guidance for our Knowledge Hub..
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Knowing when your tyres need replacing is vital for keeping your vehicle safe, legal, and performing at its best. This guide breaks down the key signs of worn or unsafe tyres, from tread depth to cracks and bulges, and offers tips on how to prolong tyre life. You’ll also learn simple at-home checks and when it’s time to invest in a new set.

Looking for a quick and easy-to-follow guide to knowing when your vehicle tyres need replacing?

Then you’ve come to the right place. In this article, we’re uncovering all the signs of worn tyres that have reached the end of their lifespan and need replacing – alongside tips on how best to prolong the life of your tyres, and where to find new ones at the best possible price.

Main Signs That Tyres Need Replacing

Some of the most telling signs of a tyre that needs replacing include:

  • Tyres with a tread depth that measures below the legal minimum limit of 1.6mm. This can be monitored by vehicle owners from the comfort of their own home and is a crucial aspect of vehicle safety and keeping your car legal to drive
  • Tyres which are cracked or have unexplained bulges to the sidewall of the tyre structure
  • Tyres with a three-digit date code, which means they were manufactured prior to 2000 and need to be replaced and updated
  • Punctured or damaged tyres

Any of these signs can indicate that it’s time for tyres to be replaced – whether it be just one or a full set.

How to Prolong the Lifespan of Tyres 

Now that you know some of the main signs that a tyre needs replacing, how exactly can you prolong the lifespan of tyres?

While, once a tyre hits one of the markers in the previous section, the damage is done and it’s too late to save your tyre, there are things you can do as part of your vehicle maintenance to ensure that tyres don’t reach the point of needing to be replaced too soon.

One thing you can do is perform a tyre rotation every six months or so, which sees tyres switched in location around the vehicle to even up pressure and wear and tear.

You should also keep an eye on and monitor tyre tread and should take a vehicle with bulging sidewalls or cracks to a mechanic to see if they can repair the damage or not. 

Why is it Important to Know When Tyres Need Replacing?

As tyres become excessively worn, not only are they unsafe to keep on the road but they leave drivers open to fines and other penalties.

If you are caught on the road with tyres which boast a tread that falls under the 1.6mm legal minimum limit, then you can be fined up to £2,500 per tyre. This means that if all four tyres are found to be illegal in terms of their tread depth, you could be forced to pay £10,000 in fines.

Having tyres which are excessively worn can also impact how much control you have over your vehicle and can elongate braking distances – having a detrimental effect on your ability to brake quickly and remain in full control of the vehicle on different road surfaces and in different conditions.

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How to Check Your Own Tyres

If you’re unsure whether you need to replace your new tyres, here are a few techniques to try at home before booking your vehicle into the garage. 

  1. Use the 20p trick to determine whether tyre tread has worn beyond the 1.6mm limit. If, when you slot the coin into the grooves in the rubber, you can see the border exposed then you know your tyres need replacing
  2. Use a tyre tread gauge to accurately measure the tread depth and to determine how close you are to needing to replace tyres
  3. Inspect the outer wall and rubber surface of tyres, checking that they are wearing evenly and are not damaged in any way
  4. Look for signs that your tyres are designated to a specific season, and may need replacing as the weather and road surface start to change with the seasons

Remember that tyre tread is not the only thing you need to monitor in assessing whether tyres are still fit for purpose. Looking for cracks and bulges is just as important to keep your vehicle safely on the road, as is ensuring that tyres are suitable for the season and road surface.

If in doubt, or if you know you need to replace your tyres, then the Tyres.co.uk team is here to help. Get in touch via the website or visit the different product pages to learn more about the different tyres brands and types available.

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