Colorado CDL Practice Test

What is the minimum tread depth for front tires to be considered good?

1. 2/32 inch

2. 4/32 inch

3. 6/32 inch

4. 8/32 inch

The correct answer is: 4/32 inch

The minimum tread depth for front tires to be considered good is 4/32 inch. Adequate tread depth is crucial for maintaining traction, especially in wet or slippery conditions, as it ensures that water can be channeled away from the tire surface, reducing the risk of hydroplaning. When the tread depth is below this minimum, the tire may not grip the road effectively, increasing the likelihood of skidding or losing control. The 4/32 inch measurement is generally regarded as a threshold for adequate performance in various driving conditions, particularly for vehicles that frequently operate in challenging environments such as those encountered by commercial drivers. Tires with depth greater than this would typically provide better traction and safety margins. Therefore, maintaining at least 4/32 inch of tread depth is not only a safety requirement but also an essential practice for preventing accidents and ensuring driver control on the road.