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. KSCT - The optimization of existing Kenda tire construction technologies allowing for a tire to maximize the benefits of fluid based sealants while also increasing the strength of sidewalls for resistance to slices and abrasion. REF - Reflective sidewall striping or hotpatch to aid in low light visibility