To read why etap is up there with bike radar39s most wanted click here to read our staff blog on the sram eagle groupset click here the radical new look and feel of our 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 we 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 chain