The Romero is Panaracer’s all rounder tire with a triple-compound, DH-oriented rubber outside of a 60tpi casing. They run a bead-to-bead Anti-Flat Plus puncture protection belt with additional rubber around the bead to help prevent pinch flats. This Super Tough (ST) version is wrapped in an anti-flat casing for extra protection. The tough casing is also perfect for making your E-Bike bombproof!