Pneumatic spring elements used in some motor vehicles make it possible to adjust the spring hardness to the current load, while maintaining a constant height of the body in relation to the road. In other words, air suspension that adjusts itself to the load, shows unchanged suspension properties. Furthermore, the suspension has a high level of low-amplitude, high-frequency vibration absorption, contributing to a quiet running gear. In newer solutions of bus and truck suspensions, equipped with pneumatic spring elements, there is a tendency to use independent wheel suspension, which significantly contributes to the increase of its transverse stiffness.