Pirelli Supercorsa SC1 Pirelli's Supercorsa lightweight design, optimized for racing and track use. 22 new track records across the U.S.A. in 2002. 0 degree stell belted front/rear to prevent centrifugal growth, which controls internal heat generated, allowing softer, stickier compounds to be used without sacrificing durability. SC1 compound is supersoft (blue ID decal). SC2 compound is soft (green ID decal). SC3 compound is medium (yellow ID decall}.ZR-rated radial tires.