Reverse X11 Evo Chain Guide Guiding Your Chain Modern drivetrains are nearly perfect nowadays, and Reverse's X11 Evo Chain Guide is designed to work perfectly with the new clutch derailleurs. Super lightweight design and DH World Cup proven. Inspired by the best riders and made for the fastest riders. This X11 Evo Chain Guide works with ISCG-05 mounts and works with 28T to 36T chainrings. Features Made from 7075-T6 aluminum Works with 28 - 36T chainrings Weight: 79g | Reverse Components | Reverse X11 Evo Chain Guide Black