What's the legal minimum tread depth for tyres on your trailer or caravan?
- A 1 mm
- B 1.6 mm
- C 2 mm
- D 2.6 mm
Why this is the answer
Trailers and caravans may be left in storage over the winter months, and tyres can deteriorate. It’s important to check their tread depth and also their pressures and general condition. The legal tread depth of 1.6 mm applies to the central three-quarters of a tyre's breadth, over its entire circumference.
Why the other answers don't fit
- A
- 1 mm — Below the legal minimum, which is the same figure as for the car.
- C
- 2 mm — Above the legal figure. A good point to replace, but not the law.
- D
- 2.6 mm — Well above what is required.
Where this comes from
- Driving: the essential skills — section 14
- 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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