It is the shock absorbers which push the wheel towards the ground so that the
tire " stick on the road " permanently and in any circumstances.
It wear is slow and progressive and can affect the general behavior of your
lorry where from a greater risk of loss of control in certain situations: bend,
hogback, aquaplanage and an increase of your distances of braking.
As your shock absorbers wear out, it is you who compensate for this loss of
efficiency by modifying your style of behaviour(canal), often without reporting
it to you.
The good state of the system of braking is as well an essential element of
the active safety of the vehicle. It is thus careful and deeply recommended
to make make regular controls.