Final answer:
The minimum tread depth for the steer tire is 4/32 inch, which is essential for vehicle safety and adherence to regulations.
Step-by-step explanation:
The minimum tread depth for the steer tire is 4/32 inch. It is important for the safety of the vehicle to maintain proper tread depth to ensure good traction and handling. Commercial vehicles especially are subject to strict regulations regarding tire tread depths to help prevent accidents due to tire failure.