Sram x sync 2 eagle chainring direct mountthe radical new look and feel of srams 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 they 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 drivetrains performance in all conditions the longer