As a driver, you have a responsibility to make sure your vehicle is always roadworthy and up to the UK’s legal specifications. To help you determine you are adhering to these laws, this page provides FAQs from drivers across the country.

What is the UK Tyre Law?

You need to do more than bring your car to the garage once a year to get inspected; it is up to you to make sure all aspects of your vehicle are safe and correct, not only so you get the best performance, but so you are within the legal limits of the law.

In order to avoid often avoidable situations such as an accident, fines, penalty points or even your car insurance becoming void, you want to make sure that everything about your tyres is as it should be.

What is the Tyre Tread Law?

There are laws regarding the legal minimum tread depth of your tyres. They need to be at least 1.6mm in a constant band through the principal three quarters of the tyre and around the entire perimeter in order to be used on the road safely.

If your tyres are below this limit, they are illegal and should be replaced immediately. However, we recommend that you change your tyres when you hit 3mm to ensure that you're on the safe side of the law as you risk a fine of up to £2,500 and three penalty points for each worn tyre.

What is the Tyre Condition Law?

Your tyres must always be in a roadworthy condition. They should be free of lumps, bumps, bulges, or tears and there should never be any of the inside fabric or cord exposed. There should also never be any cuts longer than 25mm or lacerations deep enough so the ply of the tyre is exposed.

What is the Tyre Air Pressure Law?

You are responsible for maintaining proper air pressure in your tyres. Each vehicle has specific pressures for their tyres and you can find this information in your manufacturer’s manual, on a sticker posted on the inside of the driver’s side door, or on the flap of your fuel filler.

It’s a regular occurrence for tyres to be over or under inflated, so check your tyre pressures regularly in order to ensure that you’re getting the most out of your tyres.

What is the Tyre Size Law?

It’s UK law that the tyres on the same axle of your vehicle must be of the same profile, height, construction, and basic size in order to be considered legal. Your tyres must also be the appropriate fit for the model of vehicle you are driving.

You can refer to your vehicle manufacturer’s manual to determine the types of tyres and the size they should be for your car, SUV, van, or 4x4.

What is the Spare Tyre Law?

There are no laws governing spare tyres as of 2016. In fact, many newer vehicles do not come equipped with a spare tyre and no law says you need to have one. If you do have one, you need to make sure it’s in roadworthy condition and complies with the above laws should you need to use it.

If you have any questions about the road-worthiness of your tyres or if they’re within the legal limits in order to be considered roadworthy, you should reach out to the team here at AA Tyres for more information.

Make a Booking

For a free fitting, book your tyres with us and one of our fitters will come out to you at a time that suits and make sure your new tyres are all perfectly balanced and at the right pressure. We can also check your other tyres while we’re with you and will also send you a reminder at a later date when your tyre tread is likely getting low.

Book a fitting online now