This paper describes the dependence on test parameters of the fatigue resistance of SBR. Fatigue was investigated using dumbbell specimens under load control at 1 Hz until failure. Tests were made in order to create a common Woehler-(s-n)-curve [l] while increasing the stress amplitude and also to show the influence of increasing minimum stress at constant stress amplitude on fatigue properties. The results of these tests confirmed the well-known amplitude dependence of fatigue life in filled rubbers. An additional significant influence on fatigue life is seen to be the minimum stress in the cycles applied to these materials. Fatigue life is not dependent on strain crystallisation and the results of this research can be used to increase the fatigue lives of components made from this materials.