In a garage in Apeldoorn the mechanic is unsure about a tyre's tread depth. He places the tread depth gauge exactly on a wear indicator and reads 1.6 mm. What does he conclude?
- ✓ This reading does not count: he must measure the 1.6 mm in the grooves, not on the indicator
- The tyre complies, because the 1.6 mm on the indicator counts as tread
- The tyre is rejected, because exactly 1.6 mm is already too little tread
Correct answer: This reading does not count: he must measure the 1.6 mm in the grooves, not on the indicator
Explanation
False — the requirement is at least 1.6 mm, so exactly 1.6 mm in the grooves still complies. The problem here is where he measured: a reading on the wear indicator does not count; he must measure again in the grooves. (Regeling voertuigen art. 5.2.27 | WVW 1994 art. 5 | VekaBest p.204 (Hoofdstuk 13 §13.1))
Why learners get this wrong
- Wrong: you count the wear indicator as tread. The 1.6 mm must be present in the main grooves around the whole tyre; the height of the wear indicators does not count.
- Wrong: the requirement is at least 1.6 mm, so exactly 1.6 mm in the grooves still complies. The problem here is where he measured: a reading on the wear indicator does not count; he must measure again in the grooves.
Topic: Tyres: tread, size and damage each count separately
Read the rule: Core: Tyres: tread, size and damage each count separately
Sections
- Challenge: Tyres: tread, size and damage each count separately
- The model: Tyres: tread, size and damage each count separately
- Core: Tyres: tread, size and damage each count separately
- Why it matters: Tyres: tread, size and damage each count separately
- Active recall: Tyres: tread, size and damage each count separately
- Teach back: Tyres: tread, size and damage each count separately
- Memory hook: Tyres: tread, size and damage each count separately