Montana Commercial Drivers License (CDL) 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

When should you replace tires on a commercial vehicle?

When tread depth is greater than 4/32 in

When tread separates or broken valve stems are found

Replacing tires on a commercial vehicle when tread separates or broken valve stems are found is essential for safety and performance. Tread separation can lead to tire blowouts, which pose a significant risk while driving, especially at high speeds or under heavy loads. Broken valve stems can result in air loss and tire deflation, affecting vehicle control and increasing the likelihood of accidents.

Maintaining the integrity of the tires is crucial for overall vehicle safety. Regular inspections for any signs of damage, such as tread separation or valve stem issues, enable drivers to address these problems promptly, ensuring that tires remain in good condition for safe operation. This proactive approach not only enhances safety but also contributes to the longevity and efficiency of the vehicle.

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Only when visibly worn

Every 10,000 miles regardless of condition

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