What Is the Legal Tyre Tread Depth in the UK?

Reading time: 3–4 minutes

Tyre tread depth is one of the most important safety checks for your vehicle.

But many drivers aren’t sure what the legal limit actually is.

Here’s a simple guide to UK tyre tread depth laws and what you need to know.

The Legal Minimum Tread Depth

In the UK, the legal minimum tread depth for car tyres is:

1.6 mm

This must be across the central three-quarters of the tyre and around the entire circumference.

If your tyres fall below this limit, they are illegal.

Tyre tread helps remove water from the road surface.

This improves:

Worn tyres increase the risk of aquaplaning, especially in wet conditions.

Although the legal limit is 1.6 mm, many experts recommend replacing tyres earlier.

A common recommendation is:

3 mm

At this level, tyres still provide better grip and braking performance, especially in the rain.

There are a few simple ways to check your tyres.

This is the most accurate method and gives a clear measurement.

Tyres have built-in indicators that show when tread reaches the legal limit.

Insert a 20p coin into the tread:

If the outer band of the coin is visible, your tyre may be below the legal limit

Driving with tyres below the legal limit can lead to:

It’s important to replace tyres before they become unsafe.

With TyreroomDirect, replacing tyres is simple.

The legal tyre tread depth in the UK is 1.6 mm, but replacing tyres earlier can improve safety and performance.

Regular checks help keep your vehicle safe and road legal.