The radical new look and feel of SRAM's 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 drivetrain’s performance in all conditions. 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. Sram Eagle Xsync 34T Chain Ring Features X-SYNC 2 chainring design increases chain retention, wear life, and reduces friction and noise Designed to be used with Eagle 12-speed chain Forged and CNC Machined aluminium Boost Chainline