The Roubaix Pro is an endurance road tire that's well suited for smooth and rough roads alike. That's because it's fast like any competitive road tire only it features a bead-to-bead Endurant casing plus our BlackBelt technology for puncture protection. Meanwhile the casing smooths your ride and keeps you fresh while the tread handles responsively over mixed terrain. It also features a slick center tread for low rolling resistance and shoulder sipes for increased surface adaption and grip. Specialized Roubaix Pro Bicycle Tire in Black