The minimum tread depth is 2/32 inch.

• A. 1/32 inch
• B. 3/32 inch
• C. 4/32 inch
• D. 2/32 inch

Answer: (D)

Tread depth shows how much rubber is left on a tire and the legal minimum is two thirty-seconds of an inch. This means a tire must have at least 2/32 inch of tread to be legal; anything shallower is not allowed. Deeper tread, like 3/32 or 4/32, still meets the minimum and is safer, but it describes a depth greater than the minimum. A depth of 1/32 is below the limit and would not be legal or safe. To check, use a tread depth gauge or the penny test—if you can see the top of Lincoln’s head, the depth is under 2/32 and the tire should be replaced.