MRP SXg CS Single-Chainring Guide No More Chain Drop Mountain biking can be rough on your bike. Having things like a chain guide with a skid plate will help prevent any damage to your bike while you're riding. The MRP SXg CS Single-Chainring Guide has an integrated skid that protects chainrings and glides over rocks and obstacles. It features a tracked and grooved upper guide/backplate interface that increases stiffness and has a co-molded HD2 upper guide with a softer durometer interior for silent guidance. Features Tracked and grooved upper guide/backplate interface increases stiffness and eases installation Installs and adjusts with a single 4mm hex Compatible with chain lines 49mm and wider, including Boost 148Compatible with 1x7, 1x9, 1x10, and 1x11 drivetrains Integrated skid protects chainrings and glides over rocks and obstacles | Mrp | Sxg Cs Single-Chainring Guide Sxg Iscg-05 Black