RR-020 — Minimum Tyre Tread
Question
What is the legal minimum tyre tread depth across the breadth of a tyre?
A. 5 mm B. 1 mm C. 10 mm
Correct answer: B
Explanation
The legal minimum tread is 1 mm across the breadth and around the full circumference. Below this the tyre is unroadworthy. 5 mm and 10 mm are well above the legal minimum.
Source basis
- Original question generated from the verified rule Driver Documents and Roadworthiness and topic Driver Documents and Roadworthiness. Original wording and distractors; no question bank copied. Source basis:
legislation.
Variants
- (no near-duplicate variants — distinct question)
Ontology RR-020 — Minimum Tyre Tread [relates] Driver Documents and Roadworthiness RR-020 — Minimum Tyre Tread [relates] Driver Documents and Roadworthiness
Connections
- Driver Documents and Roadworthiness — covers_topic, source: 2026-06-28
- NaTIS Learner Driver Manual — derived_from_source, source: 2026-06-28