A hydropneumatic suspension unit for a vehicle comprising: an outer sleeve; a damping piston arranged for sliding displacement in said outer sleeve; at least one damping valve at least partially positioned in said damping piston; an inner sleeve arranged for sliding displacement in said outer sleeve; a first chamber in the outer sleeve, said first chamber at least partially defined by an inner surface of said outer sleeve and said damping piston, said first chamber including at least one gas and at least one liquid, said gas primarily designed to provide a spring action and said liquid primarily designed to provide a damping action, said gas being in direct contact with said liquid in said first chamber; a second chamber at least partially defined by an inner surface of said inner sleeve and said damping piston, said first chamber and second chamber being in fluid communication and fluid flow between said two chambers is at least partially restricted by said at least one damping valve in said damping piston; a guide part for guiding a relative movement of said inner sleeve and said outer sleeve; and a first extreme position damper designed for at least partially damping a compressed extreme position, characterized by a second extreme position damper for damping an extended extreme position, wherein said second extreme position damper includes a throttling of a flow area provided in the form of radial holes in the inner sleeve, wherein, when the hydropneumatic suspension unit travels towards the extended extreme position, the outer sleeve and the inner sleeve move away from each other and the radial holes become closed as they move into the guide part, so as to reduce the throttling area. an outer sleeve; a damping piston arranged for sliding displacement in said outer sleeve; at least one damping valve at least partially positioned in said damping piston; an inner sleeve arranged for sliding displacement in said outer sleeve; a first chamber in the outer sleeve, said first chamber at least partially defined by an inner surface of said outer sleeve and said damping piston, said first chamber including at least one gas and at least one liquid, said gas primarily designed to provide a spring action and said liquid primarily designed to provide a damping action, said gas being in direct contact with said liquid in said first chamber; a second chamber at least partially defined by an inner surface of said inner sleeve and said damping piston, said first chamber and second chamber being in fluid communication and fluid flow between said two chambers is at least partially restricted by said at least one damping valve in said damping piston; a guide part for guiding a relative movement of said inner sleeve and said outer sleeve; and a first extreme position damper designed for at least partially damping a compressed extreme position, characterized by a second extreme position damper for damping an extended extreme position, wherein said second extreme position damper includes a throttling of a flow area provided in the form of radial holes in the inner sleeve, wherein, when the hydropneumatic suspension unit travels towards the extended extreme position, the outer sleeve and the inner sleeve move away from each other and the radial holes become closed as they move into the guide part, so as to reduce the throttling area.