Which of the following factors has the greatest impact on the grip of the truck tyre to the ground?

Explanation

Correct answer: The type and condition of the road surface.

Tyre grip is the result of friction between its tread and the road surface. It is the type and condition of the road surface (e.g. dry, wet, icy) that has the decisive influence on the value of this force, and thus on the control of the vehicle. Other factors, such as tyre pressure or speed, only modify the grip that can be achieved on a given surface.

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