How to Check Tyre Tread Depth with a Gauge

Photo of Author Verified
Researched, written and verified
Verified
Our methodology focuses on accuracy first.
Research is carried out using primary manufacturer data, official guidance, and trusted industry sources. Where appropriate, content is cross-checked against real-world fitting practices and common customer queries to ensure it is practical as well as technically correct. Articles are reviewed periodically and revised when regulations, standards, or best practices change.
 by Chesca D
Photo of Author
Chesca D is a Content & Editorial Coordinator at Tyres.co.uk and is responsible for researching, coordinating, and producing accurate, up-to-date tyre guidance for our Knowledge Hub..
Each article is created using manufacturer specifications, recognised industry standards, and current UK regulations, and is reviewed internally to ensure clarity and technical accuracy. Content is updated regularly to reflect changes in tyre laws, safety guidance, and product specifications.
Fact-checked by the Tyres.co.uk editorial team
Article Image

Knowing how to measure your tyre tread depth is essential for safe driving and passing your MOT. A tread gauge gives an accurate reading, helping you spot wear early and replace tyres before they become unsafe. In this guide, you’ll learn how to use a tyre tread gauge in three easy steps, understand UK legal limits, and know when it’s time for new tyres.

A tyre tread gauge is a small tool with a probe at one end, and a handheld reader at the other. 

It is one of several DIY methods that vehicle owners can use to check their tyre tread, ensuring that it falls within the legal limit. Other methods include the 20p trick and looking for the tread marker on the inner wall of the rubber grooves.

Before we dive into the process of using a tyre tread gauge, let’s consider what the legal limits are and why they are so important. 

What is the Legal Tyre Tread Depth?

The minimum tyre tread depth that’s considered legal in the UK is 1.6mm.

Any tyre with a tread depth of lower than 1.6mm is considered unsafe to drive and can result in points on your licence and a fine, if you are caught. 

NOTE: When checking your tyre tread depth regularly, consider replacing your tyres once they reach the 3mm mark.

Why is Tyre Tread so Important?

Tyre tread is important because it is what maintains control and traction with the road surface. 

As tyre tread wears down, the following can happen…

  • Stopping distances become longer
  • Your grip is compromised on wet and icy road surfaces
  • You have a higher chance of punctures

Suffice to say, ensuring that your tyres have plenty of rubber grip surrounding them is crucial. 

So, how do you check that tread depth?

3 Steps to Using a Tyre Tread Gauge

  1. Slot the probe end of the tyre gauge into the grooves of your tyre tread, until the tip of the probe is resting on the bottom of the groove 
  2. Line up the two shoulders of the handheld device so that they are sat on the outer edge of the rubber surface
  3. Read the gauge, which should now tell you how close you are to the minimum legal limit of 1.6mm

This is one of the easiest, foolproof ways of checking your tyre tread, as it gives you an accurate reading. 

You can also slot a 20p coin into the grooves and see how close the edge of the rubber is to the border of the coin, or you can look at the tyre tread marker and see how close this marker is to the surface of the tyre.

Article Image

Replacing Your Tyres

As and when your tyres reach that 1.6mm minimum tread marker, you will need to find a suitable replacement. And that’s where Tyres.co.uk comes in. 

We have a broad selection of tyres to replace your old and worn ones, spanning different seasons and brands, sizes and driver preferences. For more information or to browse our available product collection, visit our website.

Back to Knowledge Hub