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