CDL · Vehicle inspection
At a minimum, how deep must the tread be in every major groove of a commercial vehicle's front tires?
Correct answer: 4/32 inch.
Answer options
- A4/32 inch Correct
- B2/32 inch
- C3/32 inch
Why
A front tire must have tread at least 4/32 inch deep in each major groove, and all other tires at least 2/32 inch. A tire worn below those depths is a defect that has to be corrected before the trip.
About this question
Topic: Vehicle inspection License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
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This question is part of Inspecting Your Vehicle (32 questions). Take the full set and check your score.
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