Sram: THE NEXT EVOLUTION OF X-SYNC TECHNOLOGYThe radical new look and feel of the X-SYNC™ 2 chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC™ chainrings. The aggressive tooth design provides better chain retention for a smoother, more efficient pedal feel. With a focus on long wear-life, the X-SYNC™ 2 design reduces friction and the accumulation of mud, grit and grime. THINGS TO REMEMBERCompatible with 11- and 12-speed drivetrains.Designed specifically for Eagle chains and drivetrains.X-SYNC™ 2 design increases chain retention and wear life, and reduces friction and noise.SPECIFICATIONSChainring Size 30, 32, 34, 36, 38Bolt Circle Diameter (BCD) 104 BCD, 94 BCDSpeeds 12Compat - Yaw n/a, NoMaterial (Chainring) Aluminum, SteelColor (Chainring) Black