Pirelli PZero Velo 4S Road Tire 700x28C Folding Clincher SmartNET Silica Aramid Fiber 127TPI BlackHigh marks on all features: rolling, dry & wet grip, puncture protection, mileage, comfort. Its unique tread design is developed to shed water from your path even faster than the PZERO VELO. Wet or dry, even in cold conditions, the 4S will rise to the challenge. TECH SPECS Primary Color Black Bead Folding Tire Compound SmartNET Silica Tire PSI 100 Tire Technology Aramid Fiber TPI 127TPI Tire Type Clincher Tire Weight 250g Tire Width 28C Tire Width