Revision question · Safety and your vehicle

What's the legal minimum depth of tread for car tyres?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

1 mm

1.6 mm

2.5 mm

4 mm

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1.6 mmThis was the right answer

Car tyres must have sufficient depth of tread to give them a good grip on the road surface. The legal minimum for cars is 1.6 mm. This depth should be across the central three-quarters of the breadth of the tyre and around the entire circumference.

Reviewed reading for this question

Pressure, tread and tyre defectsReviewed guidance summary · The tyre section covers inflation, defects, uneven wear and the 1.6 mm car/light-trailer tread requirement across the central three-quarters around the full circumference.

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