What minimum tread depth is required on front tires of a commercial vehicle?
Detailed Explanation
Steering-axle tires require at least 4/32 inch of tread; other tires generally require at least 2/32 inch.
Official reference: New York CDL-10, Section 2.1.3: Tire ProblemsCorrect Answer: 4/32 inch in every major groove
Why This Matters on the CDL Test
Distinguish the front-tire minimum from the 2/32-inch minimum for other tires.
How to Remember It
Front: four thirty-seconds.
Answer Review
For example, a front tire measuring 3/32 inch is below the minimum, even if another groove measures 4/32.
Why the other answers are weaker
- 1/32 inchThis is below the front-tire minimum.
- Exactly 1 inchThe rule specifies a minimum, not an exact one-inch depth.
Test-Day Checklist
- Read the question once for the topic, then read it again for the exact CDL action being tested in General Knowledge.
- Eliminate answers that sound convenient but skip an inspection, warning sign, or safety step.
- Say the correct rule out loud before moving on so you can recognize it when the exam changes the wording.
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State CDL Practice Paths
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