What is the minimum tread depth for bus tires?

The minimum tread depth for bus tires is indeed critical for ensuring safety and handling performance. The correct answer, which states that the minimum tread depth is 4/32 of an inch, is established as a safety standard to help prevent hydroplaning and to maintain adequate traction on wet roads.

As tires wear down, their ability to channel water away diminishes, significantly impacting a bus's stability and control in adverse conditions. A tread depth of 4/32 of an inch provides an essential buffer before the tires become too worn to perform safely.

Other options suggest different tread depths that could compromise safety. For example, a depth of 2/32 of an inch is considered too low and would increase the risk of tire failure or loss of control, making it unsuitable for bus operation. Higher tread depths, while generally providing better traction, could be misleading as a minimum requirement since 4/32 is the threshold for safe operation.