The Sram Eagle X-Sync Direct Mount Chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. It subjected every size of chainring to untold environmental and mechanical tortures, abuse and neglect, in both lab and real-world settings, to come up with a chainring that would augment the Eagle drivetrain's performance in all conditions.  Sram Eagle X-Sync Direct Mount Chainring Features X-SYNC chainring design increases chain retention, wear life, and reduces friction and noise Designed to be used with Eagle chain 6mm Offset 34T Sram combatability