In practice each vehicle driving currently on roads in any place in the world has less or more comfortable suspension. The vehicle suspension is a set of specific components that connect the wheels with the vehicle body. Its principal task is to ensure the best possible steerabilty and stability of each vehicle. The suspension consists mainly of components responsible for vehicle wheel fastening and steering. These components are, or at least should be, responsible for suspension geometry and include suspension arm and bars. The car suspension is also more and more modern springing components having an increasing effect on driving comfort and are commonly called springs. Depending on material quality and intended use, they may be soft or hard. Beside springing components, in each vehicle there are also components absorbing shocks and vibrations. These components are commonly called car shock absorbers or dampers. The suspension contains also various bolts, pins and swivel axles and sleeves.
Most modern cars have also electronically controlled stabilizers to improve driving comfort. The suspension controller is responsible for its proper functioning and adjustment. This is a case of cars with pneumatic suspension. Such suspension requires no springs or shock absorbers to be mounted, but instead only appropriate columns that dampen vibrations and ensure proper vehicle resilience. depending on operating conditions, such suspension is able to adapt itself to the road. In most cases due to electronic sensors and suspension controller, the driver can adjust the vehicle body height. On the one hand this is a very convenient and useful solution, but on the other hand it involve slightly higher operating costs, in fact repairs of any fault that may occur.