Suspension system for vehicles

The vehicle to which the suspension system is applied comprises an engine (6), a frame (1) and a rear rigid bridge (2), characterised in that the suspension system comprises first (3) and second (4) suspension means articulated from an end to the frame (1) and from the other end to the rear rigid bridge (2), being the distance between the two ends of the first suspension means (3) different from the distance between the two ends of the second suspension means (4). It permits that rear rigid bridge to be adapted completely to the ground, independently of its irregularities, maintaining the rest of the vehicle completely flat.