To determine the minimum tread depth for tires on the tag, drive, and trailer axles of a bus, truck, tractor, or trailer, we need to understand the specific requirement for this scenario.
Given the possible options:
1. 1/32nd
2. 2/32nd
3. 3/32nd
4. 4/32nd
5. None of these
The correct minimum tread depth for these vehicles is 2/32nd of an inch.
Hence, the answer is:
2/32nd
