What is the minimum tread depth required for steer-tires?

The minimum tread depth required for steer tires is established to ensure safe handling, traction, and braking performance of a vehicle. A tread depth of 4/32 of an inch is necessary to maintain optimal contact with the road surface, which is crucial for steering control. Tread depth directly affects a tire's ability to channel water away, reducing the risk of hydroplaning, especially in wet conditions. This depth helps provide adequate grip, allowing the tires to respond effectively to steering inputs and making it essential for the overall safety of the vehicle and its occupants.

Tread depths lower than 4/32 could lead to compromised handling, reduced traction, and an increased risk of accidents, further emphasizing the importance of adhering to this minimum requirement.