Race Face Next SL Direct Mount Chainrings - 7075-T6 aluminum, aerospace grade strength - Compatible for 9, 10, and 11 speed - Narrow Wide tooth profiling ensures ultimate chain retention - Attaches as part of the Race Face CINCH system (using tool TL6800) allowing you to switch between Direct Mount rings/spiders with ease - Utilizes Race Face proprietary spline design - Stiff 4mm plate thickness to transfer loads without flexing - 41 grams (26T) ranging up to 82 grams (36T) - Compatible with Race Face cranks with CINCH system interface