The Recourse from CST is an excellent choice for road riders who want a larger volume tire for training or competition.. DC - Dual Compound two compounds comprised of a harder longer lasting center and a softer gripping corner. SC - Single compound one compound throughout the tread optimized for longevity and performance. EPS - Exceptional Puncture Safety offers an added layer of proprietary rubberized poly-fiber material between the tread and the casing to help prevent punctures