Which condition can contribute to tipping a dumper during a turn?

Driving at high speed can significantly contribute to tipping a dumper during a turn because it affects the vehicle's center of gravity and stability. When a dumper turns at high speeds, the centrifugal force acting on it increases, which can lead to a loss of balance. Since the wheelbase is relatively short compared to the height of the dumper, a higher speed can cause the dumper to lean excessively, increasing the risk of tipping over.

In contrast, steering with both hands is generally considered good practice for maintaining control. Keeping the load centered is also crucial for stability, as an uneven load can raise the center of gravity and increase the likelihood of tipping. Using a new tire typically does not contribute to tipping; instead, it can enhance grip and performance, which are vital for safe operation, especially during maneuvers.