The new 2017 GP Attack benefits from its special version of our Black Chili Compound that gives the streamlined 23 mm front tire more grip with lower rolling resistance. The optimum front tire gets you quickly into the turns, feeling light and responsive while providing ample life. The new 2017 GP Force is a powerful rear tire and with its 25 mm section combined with a fast Black Chili Compound, it gives excellent traction and road handling that's second to none. Both tires are made with Vectran puncture protection and show wear and tear levels via indicators in the tread, details that show professionals are at work. includes both Attack and Force tires. Black Chili Folding 330 TPI 110-120 recommended PSI