When historical development of vehicles is examined, horse-drawn ve-
hicles having rigid wheel has drawn attention in terms of dynamic behaviour.
In due course, wheels have been covered with rubber in order to not being
damaged freight and to gain importance of passenger’s comfort and vehicle
body has been attached to wheel mechanism with elastic materials in order to
decrease sudden impacts. Driving seat was directly attached to vehicle chas-
sis. Most of alert forces in wheels were transferred to driver and passengers.