SXg CS Steel 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(TM) technology for retention without moving parts or frictionIntegrated skid protects chainrings and glides over rocks and obstaclesInstalls and adjusts with a single 4mm hexSwingset(TM) hardware allows guides to rotate apart for easy chain installationCompatible with chain lines 49mm and widerCompatible with 1x7 1x9 1x10 and 1x11 drivetrainsSteel backplate TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Color Black Weight 185 Chainguide Mount Type ISCG-05 Max Tooth (teeth) 36