The refreshed G5 is the latest iteration of MRP's renowned, championship-winning "G" guides. Designed for: DH / GRAVITY 1x7 / 1x10 / 1x11 / 1x12 Upgrades to the G5 include the new "HD2" co-molded upper guide that utilizes a softer durometer TPU material on the interior walls and ceiling to silence drivetrain chatter. New co-molded "HD2" upper guide with softer durometer interior for silent guidance Tracked and grooved upper guide / backplate interface increases stiffness and eases installation Integrated skid protects chainrings and glides over rocks and obstacles Includes standard pulley and G-slide slider block for quiet, dependable operation in muddy and dank conditions. Oval compatible Mounting hardware included and install possible with just a single 4mm HEX wrench. Swingset™ hardware. Compatible with chainlines 50mm and wider