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During the last years more military tasks have been transferred from tracked vehicles to wheeled armoured vehicles. Studies show that in most cases off-road mobility can be obtained by wheeled vehicles. It is a disadvantage of conventional pneumatic tires that they are not serviceable after a puncture. An off-road vehicle requires modern radial tires with cross-country profile, which must be able to convert the output of the vehicles engine into tractive effort on the ground. In military operations various types of tired vehicles are expected to operate over a great variety of surfaces in cross-country transport. Reliability is of particular importance.

Owing to the uneveness of the ground the crew of a vehicle is exposed to mechanical vibrations which represent a significant strain to the human body. This strain can result in impairment of comfort, in nausea, inability to operate the vehicle and in severe health disorders. Recommendations and standards are based on the fact that acceleration magnitude is perceived to a greater extent within the range of low frequencies and that therefore is only practical to study frequencies up to 100 Hz. The assessment criteria contained in recommendations are based on sinusoidal vibrations, in fact, the vibrations of vehicle are irregularly distributed. For that reason it is necessary to carry a frequency-analysis while the vehicle is in operation. Furthermore, the attempt is made to establish correlations between road surface-condition, speed, inflation pressure, tyre-type and load, by varying the a/m influences.