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The Radical new look and feel of our X-Sync 2 eagle chain ring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-Sync chaining. Sram subjected every size of chain ring to Untold environmental and mechanical tortures, abuse and neglect, in both Lab and real-world settings, to come up with a chain ring 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.