New trends in smaller chainrings – plus a motive to craft a lighter oval chainring for mountain bikes, resulted in Direct Mount Q-Rings. The simplified one-piece design saves approximately 40 grams compared to standard ring+spider+bolts combination. FEATURES : Ride further and faster with less fatigue because you are using your muscles more efficiently Thanks to their oval shape, QX rings boost cycling performance by varying drivetrain resistance during pedaling Narrow/wide tooth profile for chain retention Semi-Aero design: reinforced rigidity and aerodynamics OCP - Optimum Chainring Position: Chainring can be oriented in different positions to fit a rider's distinct pedaling style SPECS : Material: CNC machined 7075 aluminum Designed to work with all 9, 10 and 11 speed groupsets Bolt Circle Diameter: Rotor Direct Mount (splined to mount directly to Rotor Hawk/Raptor Spindle) Weight: 67g. (30t) Color: Black