A suspension strut (10) for a vehicle including a compressible fluid (20), a hydraulic tube (22,22') and displacement rod (24) adapted to cooperate with the compressible fluid (20) to supply a suspending spring force that biases the wheel toward the surface, a cavity piston (26,26') separating the inner cavity (30) into a first section (32) and a second section (34) and defining a first orifice (36) adapted to allow flow of the compressible fluid (20) between the first section (32) and the second section (34) of the inner cavity (30), and a first variable restrictor (28) adapted to variably restrict the passage of the compressible fluid (20) through the first orifice (36) based on the velocity of the cavity piston (26,26') to the hydraulic tube (22,22').