Pirelli P ZERO Race Tire - 700 x 30 Clincher Folding BlackPirelli P ZERO Race Tire 700 x 30 Clincher Folding Black. The P ZERO Race is designed to pack all the benefts of tube type technology into a race ready all rounder tire balancing handling speed and grip. SmartEVO compound uses a blend of three dierent polymers each of them providing specifc performance qualities to achieve the optimal balance of opposing characteristics such as grip and rolling resistance TechBelt casing adds a layer of high cut