Diablo Supercorsa SP V4 Rear Tires Pirelli State-of-the-art profiles combine outstanding racetrack performance with ultimate on-road riding pleasure Bi-compound rear for sticky corner grip and smooth power application at exit Flash tread pattern with narrower grooves improves wear for more consistent performance Narrow center strip for high speed stability and stress resistance World Superbike derived bead design allows for optimal performance at both road and track pressures Blackwall Tubeless (TL) W-rated for speeds up to 168 mph or (W)-rated for speeds of 168+ mph