SXg SL Alloy Chain GuideCo-molded "HD2" upper guide with softer durometer interior for silent guidanceTracked and grooved upper guide / backplate interface increases stiffness and eases installationLower guide features Whippersnapper technology for retention without moving parts or frictionIntegrated skid protects chainrings and glides over rocks and obstaclesInstalls and adjusts with a single 4mm hexSwingset hardware allows guides to rotate apart for easy chain installationCompatible with chain lines 49mm and wider, including Boost 148Compatible with 1x7, 1x9, 1x10, and 1x11 drivetrainsAlloy backplateItem SpecificationsChainguide Mount TypeISCG-05ColorBlackMax Tooth (teeth)38Weight149 MRP SXg SL Alloy Chain Retention System UPC: 702430186377