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