Cyclocross tire for universal application but best in dry hard pack and grassy terrain. The Happy Medium's knob heights and profiles allow for a seamless transition from the tire center to the edge knobs. - DTC: Dual Tread Compound increases center tread life with the use of Kenda's L3R PRO compound (60 shore A durometer); cornering grip and control are increased by the use of Stick-e rubber (50 shore A durometer)for the shoulder knobs