The legal minimum tyre tread depth in the UK is 1.6mm across the central three-quarters of the tyre and around its entire circumference. Driving below this limit is illegal, dangerous, and can result in fines up to £2,500 per tyre and penalty points.

Why Tyre Tread Depth Matters

Tread depth is crucial for grip, braking, and water displacement. Worn tyres dramatically increase stopping distances, especially in wet conditions. Experts recommend replacing tyres when tread depth reaches 3mm, even though the legal limit is 1.6mm. This ensures maximum safety and performance on UK roads.

How to Check Tyre Tread Depth

You can check tread depth using:

• A tread depth gauge for accurate measurement.
• The 20p coin test – if the outer band of the coin is visible, tread is too low.
• Regular MOT inspections also highlight worn tyres.

Penalties for Illegal Tyres

Driving with tyres under the legal tread depth is not just dangerous, it could also cost you:

• Fine: Up to £2,500 per tyre.
• 3 penalty points per tyre.
• Increased insurance risk if involved in an accident.

Tyre Safety Tips from TyrePilot

How can you avoid driving with illegal tyres?

• Check tyres monthly and before long journeys.
• Replace tyres at 3mm tread for best wet-weather grip.
• Always fit quality tyres that meet UK standards.
• Don’t fit part worn tyres (you wouldn’t fit part worn brakes, so why take the risk with tyres you do not know the history of)