- 4 straight wide grooves enhance tire drainage deficiency and maneuverability on wet road condition. - The sub straight grooves on tire shoulder reduces shoulder stiffness and prevent from irregular wear. - Sipes on tire shoulder and center can reduce stiffness, noise. And enhance driving comfort ability. - The lateral groove design can reduce noise generation from tire. - The sipes on tire center rib can reduce stiffness and enhance driving comfort ability. - SX-2 designed by 5 pitches computer simulation formula technology can reduce tire noise efficiency.