During October, TyreSafe is highlighting the risks associated with tyres that have insufficient tread depth. Having insufficient tread depth is both dangerous and illegal. It is very easy to check the tread on your tyres, simply use a 20p coin, and insert it into the main tread grooves of your tyres. This will give you a good indication as to whether your tyres are roadworthy. If the outer band on the 20p coin is visible when inserted, your tyres may be illegal and should be checked by a qualified tyre specialist. If the outer band is not visible, your tyres have a tread depth above the legal limit.
The minimum depth your tyres must have is 1.6mm across the central three quarters of the tyre around the entire circumference. Failure to meet this standard can lead to a £2,500 fine and three points on your license.
During 2008 over 30 drivers were killed in incidents where illegal, defective or under-inflated tyres were a contributory factor. A further 900 drivers were injured due to tyre neglect.
If your tyres do not meet the minimum depth: your stopping distances will be increased, your cornering ability is reduced and the likelihood of aquaplaning in wet conditions is significantly increased. If you’re unsure about the depth of your tyres, check them, or get a professional to check them for you.
Tips for checking tyre tread depth
1. Check the depth at least once a month. At the same time check your tyre pressure.
2. If you do not have a calibrated tread depth gauge, use a 20p coin.
3. Insert the 20p coin into the main tyre grooves at several places around the circumference of the tyre.
4. If the outer band is visible when inserted, your tyre tread depth may be illegal.
5. When checking the tread depth, give the tyres a visual inspection, checking for any cuts or bulges, and remove foreign objects from the tread, such as small stones and grit.
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