Road surface characteristic is one of most important factors affecting tire structural borne noise performance.  Past experience learnt that roughness of the road surface, texture and pattern such as cross cut rain groove etc can make tire road noise performance very different.  This study is to characterize road surface as input to tire FEA model and predict tire dynamic response and spindle force.  The surface roughness can be described as power spectrum density (PSD) random input and the cross-cut rain groove as predefined displacement spectrum.  Depending on road surface textures, tire dynamic stiffness characterizes tire road noise performance better than tire spindle force transmissibility.