What is the required tire tread depth for rear wheels with a GVWR of 4500kg or more?

The required tire tread depth for rear wheels on vehicles with a gross vehicle weight rating (GVWR) of 4500 kg or more is crucial for safety and performance. A tread depth of 2 mm is essential because it ensures adequate traction on the road, which is vital for handling, braking, and stability, especially under heavy loads. Maintaining the recommended tread depth helps to address water displacement, reducing the risk of hydroplaning and enhancing control in adverse weather conditions.

The standards set for tire tread depth are based on research and testing that indicate optimal performance and safety thresholds. A depth of 2 mm is recognized as the minimum for safe operation, ensuring that the tires can effectively grip the road surface and perform as expected when carrying heavier loads. This is particularly important for larger vehicles, which experience different dynamics under load compared to lighter vehicles.

In this context, the other options reflect insufficient tread depth for safe operation in compliance with regulatory standards, posing a significant risk of reduced vehicle control and increased likelihood of accidents.