Dangerous Tyres Cause MOT Fails
Shocking MOT data reveals thousands of fails due to DANGEROUS TYRES
Every year, MOT testers flag thousands of cars for tyre defects: tread below 1.6 mm, cords showing, dangerous cuts and bulges, and mismatched or damaged tyres. If your rubber isn’t right—you won’t just fail, you’re risking fines, points, and your safety.
Heavier, high-performance cars and large SUVs put extra load and heat into tyres, accelerating wear—making them more likely to fail an MOT if your tread or repairs aren’t up to scratch. Proper fitting and quality material matter.
Recent MOT findings: common tyre fails
Tread below 1.6 mm across central ¾
A frequent failure. Inner-edge wear often escapes notice until it’s too late (DVSA MOT Manual — Section 5 · TyreSafe: Tread depth).
Cuts, bulges, cords/wire exposed
Sidewall damage and cord exposure are instant fails (DVSA — Section 5).
Mismatched tyres or perished rubber
Wrong load/speed ratings or aged rubber can trigger fails, especially on performance or 4×4 vehicles (TyreSafe: Tyres & the Law).
Why this matters
- MOT failure = time & money. Dangerous tyre defects mean you can’t drive—you’ll need repairs and a retest (After the test).
- Strict penalties. Fines up to £2,500 per tyre and 3 penalty points per tyre for illegal tyres (TyreSafe: Penalties).
- Big scale — serious risk. Tyres cause about 60% of dangerous MOT fails—over 1.4 million cases last year (Direct Line/DVSA data).
How to pass your MOT on tyres
- Measure your tread. Replace around 3 mm for wet grip; legal minimum is 1.6 mm (TyreSafe: Tread depth).
- Inspect for damage. Bulges, cuts, exposed cords = immediate fails (DVSA — Section 5).
- Align & inflate. Incorrect camber or pressure can wear inner edges fast — check before test day (TyreSafe Checks).
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