The X-Sync 2 radical tooth profile lasts longer, runs quieter, and further improves chain retention. 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 Designed to be used with Eagle 12-speed chains 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