MOT Tyre Requirements Explained: What You Need to Know Before the Test
11 March 2026
If your MOT is coming up and you’re not sure what you need for the test, we’ve got you covered.
In this guide, we’ll explain the MOT tyre requirements in layman's terms so you know exactly what to look for before taking your car in for its test.
What Is the Legal Tread Depth for an MOT?
In the UK the legal minimum car tyre tread depth is 1.6mm, this applies across the central three quarters of the tyre, around the entire circumference.
If any tyre tread in this area is below 1.6mm, your vehicle will fail its MOT. This applies to all four tyres.
Many experts recommend replacing tyres before they reach 1.6mm, especially if you will be driving in wet conditions. Once tread drops below 3mm, stopping distances increase significantly on wet road surfaces.
An easy way to check tread depth is by using a tread depth gauge. Some drivers also use the 20p coin test. If the outer band of the coin is visible when placed into the tread, your tyre may be below the legal limit.
What Tyre Damage Causes an MOT Failure?
Your tyres do not just need to pass the legal tread depth. They must also be free from serious damage.
Common MOT tyre failure reasons include:
- Bulges or lumps in the sidewall
- Cuts longer than 25mm or deep enough to expose the cord
- Exposed cords or ply
- Severe cracking
- Objects embedded in the tyre
- Incorrectly fitted tyres
- Valve damage
- Illuminated TPMS warning light
If the structure of the tyre is compromised in any way, your MOT is likely to fail. Sidewall damage is especially serious because it cannot be repaired safely.
Do All Four Tyres Get Checked During an MOT?
Yes. All four fitted tyres are checked. The MOT tester will inspect:
- Tread depth
- General condition
- Tyre size compatibility
- Load rating and speed rating suitability
- Directional tyre fitting (if applicable)
Mixing tyre types incorrectly can result in a failure or advisory. Get this checked beforehand if you can, by booking a service with us.
Can You Fail an MOT for Incorrect Tyre Pressure?
Tyre pressure itself is not directly tested as a pass or fail item. However, if tyres visibly appear severely underinflated or flat, this will result in an MOT fail. Keeping your tyres inflated to the manufacturer’s recommended pressure helps prevent uneven wear and extends tyre life.
What About Run-Flat, Winter or All-Season Tyres?
These tyre types are perfectly acceptable for an MOT as long as they meet the legal tread depth and are in good condition.
Winter tyres must still meet the 1.6mm legal minimum, although for winter performance they are most effective above 3mm.
Run-flat tyres are tested in the same way as standard tyres. Damage or excessive wear will still result in a failure.
What Tyre Checks to Carry Out Before Your MOT
Before your test, take five minutes to check your tyres for:
- Sufficient tread depth on all four tyres
- Any visible damage or cracks
- Objects stuck in the tread
- Uneven wear patterns
- Correct tyre size on each axle
If you notice anything unusual, it is best to get your tyres checked before your MOT appointment. Replacing tyres ahead of time can save you the inconvenience of a retest.
At Setyres, you can book a tyre inspection or replacement before your MOT, helping you avoid unexpected failures. We offer a mobile tyre fitting service if you prefer or visit your local branch.
Why Tyres Are Essential for Safe Driving
Tyres are the only part of your car that make contact with the road. Worn or damaged tyres will adversely affect braking distance, steering control and grip in wet conditions.
Keep your car tyres in good condition to avoid failing your MOT. A quick check now can save time, stress and additional costs later.
If you are unsure about your tyre condition, our team can inspect them and advise whether they are safe and MOT ready.
Book a Servicing Before Your MOT
If your MOT date is approaching, do not leave it to chance. Booking a service in advance gives you peace of mind and helps you avoid an MOT failure.
Setyres also offers purchasing tyres online and MOT services across our branches. Our team will make sure your tyres meet legal standards and keep you safe on the road.
FAQs
Can I drive with tyres below 1.6mm before my MOT?
No. Driving with tyres below the legal limit is illegal and unsafe, and you could face a fine and penalty points.
Do new tyres guarantee an MOT pass?
New tyres will meet tread depth requirements, but the MOT checks many other parts of your vehicle too.
How do I know if my tyres are MOT ready?
Check tread depth, look for damage and ensure tyres are correctly fitted. If you are unsure, book a service with us before your MOT.