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Idaho Class D Knowledge Practice Test
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Vehicle Safety, Documents & TowingStandalone practice
What minimum tire tread depth does Idaho’s handbook give for passenger-car safety?
Correct answer: At least 2/32 inch
Why
The handbook specifies at least 2/32 inch of tread. Inspect tires for wear and damage, and use the correct pressure. The minimum is not a promise of good grip in snow, heavy rain or other poor conditions.
Verified against Idaho Driver’s Handbook, July 2026 · Worn passenger-car tire tread · p. 39
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