Two tires in one - fast rolling center section paired with aggressive outer edges for cornering control. A universal design that is applicable to a wide variety of riding styles and conditions. Knobs designed for seamless transitions from center to edge. DTC - Dual Tread Compound is a combination of two different rubber compounds L3R Pro (center knobs) and Stick-E rubber (corner knobs). REF - Reflective sidewall striping or hotpatch to aid in low light visibility