Car Tyres and MOT Explained: What Every Driver Needs to Know

Frequently Asked Questions

What is the legal tread depth limit for cars in the UK?

The legal minimum depth is 1.6 millimetres across the central three-quarters of the tyre tread around the entire circumference. Driving on tyres below this limit is illegal, risks penalty points, and results in an immediate MOT failure.

Can a tyre with a sidewall bulge pass an MOT?

No, a tyre with a sidewall bulge will fail the test straight away because the bulge indicates broken structural cords within the casing. Driving on damaged cords risks a sudden blowout, meaning the tyre must be replaced straight away.

Why should tyre pressures always be checked when cold?

Driving heats the air inside the tyre. This extra heat raises the pressure and causes falsely high gauge readings. Checking cold tyres ensures inflation matches the vehicle's manufacturer's target figures.

What causes a tyre to wear heavily on one edge?

Uneven wear usually points to poor wheel alignment. Potholes can knock camber or toe angles out of line. If the steering angles are misaligned, the tyre scrubs sideways along the road, rapidly stripping rubber away.

Drivers can inspect tyre condition and arrange work at a local garage at mzkautos.co.uk to keep vehicles roadworthy.