You've been saving the big guns for race day, so you better be sure that they're ready to dish out some pain. It would be a shame to waste all that time and energy because you didn't pick the tire tires. The 4ZA Cirrus road tires use a hard rubber center section to minimize rolling resistance, while the softer shoulders improve cornering--especially important during crit races. The 100% Kevlar reinforcement minimizes punctures without adding weight, and the 127 TPI casing gives a soft, supple ride.
Triple compound rubber optimizes performance in race conditions
Hard rubber center minimizes rolling resistance to help you maintain your speed
Medium intermediate rubber improves acceleration after cornering