Staggered medium-height center knobs are ramped to reduce rolling resistance while fairly aggressive corner knobs provide excellent cornering grip. The CST Patrol mountain bike tire features a versatile tread pattern suitable for a broad range of conditions. Folding bead models features CST`s EPS puncture resistant belting and dual compound. DC - Dual Compound two compounds comprised of a harder longer lasting center and a softer gripping corner. EPS - Exceptional Puncture Safety offers an added layer of proprietary rubberized poly-fiber material between the tread and the casing to help prevent punctures. TR - Tubeless Ready compatible with sealant based tubeless systems or with tubes