Wheel Suspension System for a four-wheel vehicle, whereby each side of the vehicle is raised independently of the other side. Concurrently, the leverage ratio of the suspension of each wheel is modified according to the currently selected vehicle side height. Each wheel of the vehicle is elastically linked to the other wheel on the same side of the vehicle, in such a manner that, whenever the suspension of one wheel is compressed, the suspension of the other one tends to expand. In a more sophisticated version, each wheel is additionally linked in an elastic fashion to the wheel located diagonally on the opposite side of the vehicle, in such a manner that, whenever the suspension of a wheel is compressed, the suspension of the diagonally opposite one tends to get compressed, too. Auxiliary arm levers located between the wheels and the corresponding elastic units modify the leverage ratio between wheels and elastic units, in conjunction with the current position of the suspension of each wheel.