Eagle Technology creates the smoothest, quietest, longest lasting and most efficient drivetrains we've ever made. The radical new look and feel of our 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 chain to increase chain retention and overall pedaling efficiency, while decreasing friction, noise and wear. FEATURES: X-SYNC 2 chainring design increases chain retention, wear life, and reduces friction and noise. Designed to be used with Eagle chain SPECS: Chainring size: 30T, 32T, 34T, 36T, 38T Bolt circle diameter (BCD): Direct Mount (DM) Speeds: 12 Compat - Yaw: n/a Material (chainring): Aluminum Color (chainring): Grey