An aggressive yet well rounded downhill and gravity tire with well spaced, partially hollow and siped tall knobs for extreme grip An aggressive yet well rounded downhill and gravity tire with well spaced, partially hollow and siped tall knobs for extreme grip RSR - Building on the impressive original, the new RSR compound is a dual layer tread rubber, with the soft RSR compound on top and the stiff SRC on bottom AGC - Advanced Gravity Casing, utilizes strips of Kenda Vector Shield (KVS), a lightweight woven aramid material, positioned under the tread area and along the sidewalls to protect the tire from cuts and punctures - The KVS material offers nearly three times more cut resistance than standard protect