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Difficulty: EasyTires, Wheels, and Rims Inspection

A commercial driver is checking the condition of the drive axle tires on a tractor-trailer. What is the minimum allowable tread depth required in all major tread grooves on non-steering drive and trailer tires?

  1. A
    4/324/32 inch
  2. 2/322/32 inchAnswer
  3. C
    1/321/32 inch
  4. D
    3/323/32 inch

Answer

The minimum allowable tread depth for non-steering drive and trailer tires is 2/322/32 inch in every major groove.
Commercial motor vehicle safety regulations require a minimum tread depth of 2/322/32 inch in every major groove on all tires other than front steering tires, including drive axle and trailer tires.

Step-by-Step Solution

1
Identify the tire axle position specified in the scenario.
The question specifies drive and trailer tires (non-steering positions).
Commercial vehicle regulations apply different minimum tread depths depending on axle position.
2
Determine the legal minimum tread depth for non-steer tires.
Non-steering tires require at least 2/322/32 inch of tread depth in every major groove.
Federal CDL inspection rules require at least 4/324/32 inch on front steer tires and at least 2/322/32 inch on all other tires.

Key Concept

Axle-specific minimum tire tread depth standards for commercial motor vehicles.
Estimated Time:45s
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Topics

Tires, Wheels, and Rims Inspection

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