Your tyres are the only part of your vehicle that makes contact with the road. Keeping them in good condition is essential for safety, braking performance and fuel efficiency. Knowing when to replace your tyres helps prevent accidents and avoid unnecessary wear on other parts of your vehicle.
Tread Depth Reaches the Legal Limit
In the UK, the legal minimum tread depth is 1.6mm across the central three-quarters of the tyre. Driving with tread below this limit is illegal and can lead to fines and penalty points. However, many safety experts recommend replacing tyres at around 3mm. Braking performance, especially in wet conditions, reduces significantly below this level.
You can check tread depth using a gauge or by looking at the tread wear indicators built into the tyre grooves.
Uneven Wear
If the tyre is more worn on one edge than the other, it may indicate issues such as incorrect wheel alignment, improper tyre pressure or suspension problems. Uneven wear reduces grip and can shorten tyre lifespan. In these cases, replacement is often needed alongside correcting the underlying issue.
Cracks, Bulges or Damage
Visible cracks in the sidewall, cuts in the rubber or bulges can weaken the tyre structure and increase the risk of a blowout. If you notice any of these signs, you should inspect the tyre and replace it as soon as possible.
Frequent Loss of Pressure
If a tyre regularly loses air, it may have a slow puncture or internal damage. While you can safely repair some punctures, repeated pressure loss often means you should replace the tyre.
Age of the Tyre
Even if tread depth looks adequate, tyres degrade over time. Most manufacturers recommend replacing tyres after around 6–10 years, depending on usage and storage conditions. You can find the production date on the tyre sidewall in the DOT code.
Changes in Handling or Vibration
Increased road noise, vibration through the steering wheel or reduced grip in wet weather can all indicate tyre wear or internal damage. If your vehicle doesn’t feel as stable as usual, it’s worth having your tyres checked.
Regular inspections and correct tyre pressure can extend tyre life, but replacing worn or damaged tyres promptly ensures safer driving in all conditions.
