Front or rear directional. Fast rollin center knobs with aggressive side knobs for cornering. Lightweight EPS puncture resistance. 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 UST - Universal Standard Tubeless licensed tire for use with UST designated rim combinations for the best possible tubeless interface SC - Single compound, one compound throughout the tread optimized for longevity and performance Standard 26x2.1 559 Wire Bk/Bsk 65 660 27 SC NoUPC/EAN/GTIN: 6933882507340