Aluminum chainrings for Eagle drivetrain. Developed with S100, S200 and S500 in mind. Features 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 Specs Model ID: CR-XSNC-DM-F1 Rear Speeds: 12-Speed Chainring Size: 30t, 32t, 34t BCD: Direct Mount, 3-Bolt Offset: +3mm Chainring Material: Aluminum Compatibility SRAM Eagle S-Series, including the S100, S200, and S500, are built to work seamlessly with previous generation SRAM Eagle 12-speed components (SX, NX, GX, X01, XX1), offering backward compatibility with your existing drivetrain S-Series components are not compatible with SRAM Transmission (T-Type) Designed to be used with Eagle 12-speed chains