A significant proportion of UK motorists are unaware of the legal requirements for their vehicle's tyres, according to new research from the RAC. The survey found that more than half of drivers, 55%, do not know the minimum legal tread depth for tyres, raising concerns about road safety and the potential for drivers to incur substantial penalties.
Under current UK law, car tyres must have a minimum tread depth of 1.6mm across the central three-quarters of the tread and around the entire circumference. Driving with tyres that fall below this standard is illegal and can lead to severe consequences. For each illegal tyre, a driver could face three penalty points on their licence and a fine of up to £2,500. With four illegal tyres, this could amount to 12 points and a £10,000 fine, potentially leading to a driving ban.
The RAC highlighted that this lack of knowledge is particularly concerning given the critical role tyres play in vehicle safety. Worn tyres significantly reduce grip, particularly in wet conditions, increasing stopping distances and the risk of aquaplaning. The organisation urged drivers to familiarise themselves with the legal requirements and to conduct regular checks on their tyres, including tread depth, pressure, and overall condition.
Motoring organisations frequently advise drivers to use the built-in tread wear indicators found on most tyres as a simple visual guide. These small raised bars are located in the main grooves of the tyre tread and become flush with the tyre surface when the tread depth approaches the legal limit. Despite these aids, the survey suggests a widespread disconnect between drivers and fundamental vehicle maintenance knowledge.
The Department for Transport has consistently stressed the importance of roadworthiness for all vehicles on UK roads. While annual MOT tests check tyre legality, drivers are responsible for maintaining their vehicles to a safe standard between these inspections. The implications of this survey are clear: a substantial number of drivers may inadvertently be putting themselves and other road users at risk, alongside facing significant financial and legal repercussions.