Uh, they absolutely do add to the lift. Any time a damper is gas charged, it has to add lift, you can’t avoid it.Shocks and struts are pressurized to keep the fluid inside from getting aeriated, not support the weight.. The pressure inside is not great enough to hold any appreciable weight of the car. That's the job of the springs. The struts do two things: control the oscillations of the springs and act as a structural piviting point, taking the place of the upper ball joint and upper control arm..