Ontario Class F Practice Test · Question
During a pre-trip inspection, what is the minimum legal tread depth for the front (steering) tires of a commercial vehicle?
The 'tread depth' is a critical safety measurement. For most commercial vehicles, the minimum legal tread depth for front tires is and 3.2 mm (4/32 inch). Rear
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Question: During a pre-trip inspection, what is the minimum legal tread depth for the front (steering) tires of a commercial vehicle?
Answer options:
- 1.6 mm (2/32 inch) ✅ 3.2 mm (4/32 inch)
- 5.0 mm (6/32 inch)
- 0.8 mm (1/32 inch)
Correct answer: 3.2 mm (4/32 inch)
Explanation: The 'tread depth' is a critical safety measurement. For most commercial vehicles, the minimum legal tread depth for front tires is and 3.2 mm (4/32 inch). Rear tires are often allowed less, typically 1.6 mm.
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