Commercial Driver License (CDL) Class B Practice Test

What is the minimum tread depth for other tires on commercial vehicles?

1. 2/32 inch

2. 4/32 inch

3. 3/32 inch

4. 1/32 inch

The correct answer is: 2/32 inch

The minimum tread depth for other tires on commercial vehicles is indeed 2/32 inch. This measurement is critical for ensuring adequate traction and handling on the road, especially under adverse weather conditions. A tread depth of 2/32 inch is considered to be the absolute minimum for safe operation. Below this threshold, tires can be more susceptible to hydroplaning and may not provide adequate grip, particularly in wet conditions. Maintaining the correct tread depth is vital for both safety and compliance with regulations, as insufficient tread can lead to reduced performance and increased risk of accidents. While some may consider replacing tires before they reach this minimum to ensure optimal performance, 2/32 inch is the legal requirement that must be adhered to for commercial vehicles to operate safely on public roads.