Utilising MRP's patented integrated skid, the XCg tucks neatly behind your crankset and protects those costly chainrings from damage. The replaceable nylon skid glides over rocks and obstacles.Key Features:Two sizes, 32t and 36t,Great accessory to protect costly chainrings,Integrated skid protects chainrings and glides over rocks and obstacles,88g (XCg V2 32t, ISCG-05 model).