Eagle Technology creates smooth, quiet, long lasting and efficient drivetrains. The radical new look and feel of the X-SYNC 2 Eagle chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. The longer, positive-rake tooth shape has been designed to work perfectly with the new Eagle 12-speed chain to increase chain retention and overall pedaling efficiency, while decreasing friction, noise and wear. Fully CNC Aluminum ring construction Eagle technology provides an expanded, optimum, gear range for 1x drivetrains X-SYNC 2 chainring design increases chain retention, wear life, and reduces friction and noise Details: Material: Aluminum, Steel Speeds: 12-speed Bolt Circle Diameter (BCD): Direct Mount Compatibility: SRAM Eagle X-Sync 2 Direct Mount Chainrings are compatible with the following Chain: NX Eagle , GX Eagle , X01 Eagle , and XX1 Eagle 12-speed chains Crankset: SRAM direct mount cranksets