What is the maximum allowable tread depth for commercial vehicle tires?

The maximum allowable tread depth for commercial vehicle tires is crucial for safety, performance, and compliance with regulations. The correct answer indicates that the minimum required tread depth is 4/32 of an inch for steer tires, which is essential because these tires are responsible for steering control and cannot afford to have insufficient tread for proper traction. A greater tread depth ensures better grip on the road, especially in wet conditions, reducing the risk of hydroplaning and improving overall vehicle handling.

For other tires, the minimum tread depth is 2/32 of an inch, which reflects the different requirements based on the tire's role on the vehicle. While these rear tires still need to maintain some level of tread to ensure proper functionality, they do not face the same demands as the steer tires. This differentiation in tread depth requirements is established by regulation to ensure the safety of operating commercial vehicles, making it clear that maintaining sufficient tread depth is a responsibility of all commercial drivers and fleet managers.

The other options do not reflect the legal standards for tire tread depth for commercial vehicles, indicating lower tread depths that could compromise safety and vehicle operation.