Effective factors on rolling resistance of radial passenger car tire

The effective factors on the rolling resistance of radial passenger car tire are analysed.It is shown by the hysteresis losses resulted from the tire deformation and the material itself that the tire structure,the reinforcing materials in carcass ply and belt,the tread compound,as well as the inflation pressure and load of tire are the effective factors on the rolling resistance of radial passenger car tire.The rolling resistance of the tire can be reduced by decreasing the aspect ratio of tire,increasing the diameter of rim,using the materials with high modulus in belt and the materials with low hysteresis,such as S SBR and silica,in tread compound.