Safe drivingQuestion 34 of 312
What is the least tread depth a tire may have for use on the highway?
- 0.6 mm
- 3.2 mm
- 6.4 mm
- 1.6 mm
Show answer
Correct answer: 1.6 mm
Tires with less than 1.6 mm of tread in any of three places are not allowed.
Source: Highway Traffic Act (PEI, consolidated to May 29, 2026), s. 122 Tire standards, page 71
Practice safe drivingQuestions last reviewed: 18 October 2026