Quick answer: The legal minimum tyre tread depth in the UK is 1.6mm across the central three-quarters of the tyre, around its entire circumference. Safety experts recommend replacing tyres at 3mm, because braking distances in wet weather increase well before you reach the legal limit.
What is the UK legal tyre tread limit?
Cars, vans and light trailers must have at least 1.6mm of tread across the central three-quarters of the tyre, all the way round. Driving on illegal tyres can mean a fine of up to £2,500 and 3 penalty points per tyre, so four bald tyres could put you at risk of a licence ban.
How to do the 20p test
- Take a 20p coin and place it into the main grooves of your tyre.
- If the outer band of the coin is hidden by the tread, you’re above the legal limit.
- If you can see the whole band, your tread may be too low and the tyre needs checking.
- Repeat at several points across the tyre and on all four tyres.
For a precise reading, use a tread depth gauge. They are cheap and available from most motor shops.
Why replace tyres before 1.6mm?
Tread clears water from under the tyre. As it wears, grip drops and stopping distances grow, especially on wet roads. Most tyre experts advise replacing at 3mm, not waiting for the legal minimum.
Other signs you need new tyres
- Cracks or bulges in the sidewall
- Uneven wear on one edge
- Vibration while driving
- Repeated pressure loss
- Tyres more than 10 years old (check the date code on the sidewall; many experts advise inspection from around 5 years)
Check your pressure monthly too, using the figures in your car’s handbook or the fuel flap.
Need tyres replaced in Southampton?
U SAT & Tyres is a 24/7 mobile tyre fitting service. We come to your home, workplace or roadside, so you don’t have to take time off to visit a garage.
- Flat tyre or blowout? See our 24/7 mobile emergency tyre service in Southampton.
- Lost your key? We offer locking wheel nut removal in Southampton.
- Not sure mobile is right for you? Read why mobile tyre fitting is the smartest choice for UK drivers.
- Learn more about our mobile tyre fitting service.
Call us on [07308401100] or message us for a quote.
FAQ
Is 2mm tread legal in the UK?
Yes, anything above 1.6mm is legal, but 2mm is close to the limit and wet grip is already reduced.
How often should I check tread depth?
Once a month, and before long journeys.
Can you fit tyres at my home?
Yes. We cover Southampton and surrounding areas in Hampshire and Dorset.
