Abstract: In a shock absorber assembly for a vehicle, a closed flexible hollow body mounted on a rigid support member, such as a part of the vehicle understructure, and a highly compressible fluid medium, for instance air, is filled into the hollow body. Another rigid support member of closed hollow construction is mounted against the opposite side of the hollow body from the support member on the vehicle understructure. The hollow support member can be lined interiorly with a closed bladder-like member and connected by a throttling member to the hollow body to act as an equalizing member when the hollow body is compressed by shock forces. As an alternative, two similar shock absorber assemblies can be spaced apart on a vehicle with each including one of the closed flexible hollow bodies and with the throttling member connected between the hollow bodies in the separate shock absorber assemblies.