The new look and feel of the SRAM Eagle X-SYNC Chaining is a radical move away from existing designs. Featuring a longer, positive-rake tooth, the X-SYNC chainring has been perfectly engineered to work in unison with the Eagle Chain to increase chain retention and peddling efficiency, whilst decreasing noise, friction and wear. The X-SYNC has been meticulously designed by SRAM drivetrain engineers, who have studied the performance and wear of countless X-SYNC chainrings in the most extreme of environments to create a chainring that would augment the Eagle drivetrain performance, in all possible conditions.  12 Speed Boost 3mm Offset