Practice question

What is the legal minimum tread depth for the steering axle tires of a CMV that has air brakes?

  1. 1/32 inch on steer tires
  2. 4/32 inch on steer tires (and 2/32 inch on other tires)
  3. 8/32 inch on steer tires
  4. No requirement

Answer: B — 4/32 inch on steer tires (and 2/32 inch on other tires)

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