What is the minimum tread depth required on turning axle tires?

The minimum tread depth required on turning axle tires is crucial for ensuring adequate traction, handling, and safety while operating fire service vehicles. The correct minimum tread depth of 4/32" helps provide the necessary grip, especially during turns and adverse weather conditions, such as rain or snow.

Having an adequate tread depth is vital for preventing hydroplaning and maintaining control when maneuvering. This measurement not only aligns with safety regulations but also reflects best practices in vehicle operation. In contrast, greater tread depths, such as 6/32", 8/32", or even 2/32", are either not a requirement or exceed the legal minimum. Tires with tread depths lower than the specified amount would not effectively manage water displacement or provide sufficient traction, making them unsafe for operational use.