57 The invention relates to suspension systems for multiple axle systems. With multiple axle vehicles, it is necessary not only for the vehicle to carry a total load within a permitted maximum, but also for the load applied to each axle to be within a permitted maximum, It is not uncommon in on-the-road, in off-the-road use that the wheels of an axle lose contact with the ground, thus transferring the total load to the remaining axles, which then takes loads greater than the permitted maximum, and for which they may not have been adequately designed. The object of the invention is to eliminate this problem, which objective is met by a suspension system comprising in respect of each axle (2), two trailing arms (3) one to each side of the vehicle and pivotally mounted (4) below the vehicle, the respective axle (2) being mounted across the two trailing arms (3), and a fluid displacer (5) mounted between each trailing arm and the vehicle body, the fluid displacers (5) to each side of the vehicle being connected to each other in the longitudinal direction.