Smooth fast rolling center with gravel oppressing micro knobbed shoulders. DTC - Dual Tread Compound is a combination of two different rubber compounds L3R Pro (center knobs) and Stick-E rubber (corner knobs). TLR/TR - Tubeless (Light) Race is the lightest tubeless ready version of tires Kenda offers and also features an improved bead shape for better retention. GCT - Features the GCT casing which wraps the tire from bead to bead with a secondary casing layer acting as a shield against punctures and sidewall slashes without the weight of conventional belting. REF - Reflective sidewall striping or hotpatch to aid in low light visibility