Correct answer
1.6 millimetres
It is 1.6 mm under Annex VII.2 of the General Vehicle Regulations. The question specifies an M1 car: this is not a universal minimum for every vehicle. Check main grooves and wear indicators, alongside damage, pressure and overall condition. Meeting that minimum does not guarantee grip or replace adapting driving, particularly on wet roads. Recommendations for earlier replacement do not change the legal minimum.
Practice more B licence questions
A 3-minute quick test with exam-style questions. Free, no signup.
All options
2.5 millimetres
2 millimetres
1.6 millimetres
Editorial status: editorially approved. This status does not certify legal review. Report a correction
Share this question
Keep studying
Related questions
- What effect does aquaplaning have on tyre contact with the road?
- At what inflation pressure should a vehicle's tyres be kept?
- What problem can an under-inflated tyre cause?
- What is the phenomenon called in which the tyre's surface grips the road surface?
- What circumstances can cause tyres to wear more than usual?
- Which vehicle component best absorbs bumps and uneven ground?