Checking Your Tyres

If you’re worried about the tread on your tyres, there are a number of checks you can perform.


Currently, the UK legal limit for tread on your vehicle’s tyres is 1.6mm across the central three-quarters of the tyre. However, at Tyrecityuk, our experts will always recommend you change your tyres around the 2mm point. Drivers outside the legal limit can have a hefty fine of up to £2500 and 3 points on your driving license, per tyre.

The 20p Test:
A quick and simple way to determine if your tyre tread is running below the legal limit is to take the 20p test.
1) Simply place 20p coin into the lowest tread depth of your tyre.
2) If outer rim around the edge of the coin cannot be seen, the tyre is above the legal limit and safe with a minimum tread depth of 3mm.
3) If outer rim around the edge of the coin is visible, your tyre tread is less than 3mm and should be checked by tyre experts

While you take this the test, remember to check at least 3 locations around each tyre to ensure safety. As 20p test is so quick and simple, stay safe by examining your tyres at least once a month.

When to check your tyre pressure

Keeping the correct air pressure in your tyres is as vital as giving your engine a tune up and and helps optimise tyre performance and fuel economy.
We recommend you should check your tyre pressure when your tyres are cold every two weeks and before any long journey to ensure they meet the manufacturer’s recommendations, keeping you and your family safe.

Incorrect tyre pressure may cause unnecessary wear on your tyres which means they could wear unevenly or even need replacement prematurely. If you are not sure what your car tyre pressure should be, then consult your handbook or ask one of our experts.

Reading your tyre size

As well as the with the manufacturer’s name and the name of the tyre (e.g. Dunlop), there is a set of numbers and letters that relate to the size of the tyre.
If you’re not entirely sure how to read the dimensions on the sidewall of your tyres, we can help you understand exactly what each number and letters stand for


Tyre Size Designation
Tyre size designations can be found on the sidewall of tyre.
The first number refers to the nominal width of your tyre’s cross-section in millimeters. The number after the ‘/’ indicates the aspect ratio. This correspond to the height of the tyre sidewall as a percentage of the nominal section width. The following letter indicates the construction of the tyre, with the number following it indicating the diameter of the tyres inner rim in inches.

Load Capacity
This number refers to the maximum weight the tyre can carry at the speed indicated by the Speed Rating Symbol.

Speed Category Symbol
A letter that indicates the speed at which the tyre can carry the load corresponding to the Load Capacity Index. Common ratings are: S, T, H, V, W, Y and Z.


We’re on hand
Understanding your tyres, their tread depths and their pressure can be a tricky business. If you’re unsure about anything, we have a team of experienced technicians on hand to perform your free Tyre Safety Check. They will be able to offer you expert advice on:
• Tyre Size
• Tyre Pressure
• Tyre Tread
• How to check for damage
• How to maintain your tyres

Book Today
Most Tyre Safety Checks do not require a booking; simply visit your nearest Tyre City UK Branch. If you would to prefer to book a suitable time, or you know the tyres you require, select them from the Find Your Tyres list, search for your nearest tyre fitting centre and enter a suitable time to attend.