SXg SL Alloy Chain Guide Co-molded "HD2" upper guide with softer durometer interior for silent guidance Tracked and grooved upper guide / backplate interface increases stiffness and eases installation Lower guide features Whippersnapper(TM) technology for retention without moving parts or friction Integrated skid protects chainrings and glides over rocks and obstacles Installs and adjusts with a single 4mm hex Swingset hardware allows guides to rotate apart for easy chain installation Compatible with chain lines 49mm and wider including Boost 148 Compatible with 1x7 1x9 1x10 and 1x11 drivetrains Alloy 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 149g Chainguide Mount Type ISCG-05 Max Tooth (teeth) 34 Chain Guide Size 30-34T