What’s the minimum depth of tread on the tyres of a trailer?
- A 1 mm
- B 1.6 mm
- C 2 mm
- D 2.2 mm
Why this is the answer
Your car or small van must have a minimum tread depth of 1.6 mm across the centre of the tread and around the entire circumference. This also applies to the tyres on your trailer.
Why the other answers don't fit
- A
- 1 mm — Below the legal minimum. The 1.6 mm figure applies to the trailer exactly as it does to the car.
- C
- 2 mm — Often recommended as the point to start shopping for tyres, but it is not the legal minimum.
- D
- 2.2 mm — Above the legal figure; no regulation uses this number.
Where this comes from
- The Highway Code — page 149
Rule numbers link to The Highway Code on gov.uk.
Where this question comes from
The question, its options and the explanation are reproduced word for word from the DVSA revision question bank under licence. The licence requires them to appear unaltered, so we cannot reword them and neither can anyone else — that is why you will meet the same wording on other sites. Everything else on this page is written by Theory Hub: the explanation of why each wrong answer is wrong, the topic guide and the revision notes.
Asked in: Car
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