SRAM X-Sync 2 Eagle Cold Forged Direct Mount Chainring 30T Boost 3mm OffsetIntense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer, runs quieter and further improves chain retention. Cold forged Aluminum ring Eagle Technology tooth profile Approximate +10g in weight compared to the fully CNC version Item Specifications Defined Color Black Direct Mount Type Direct Mount SRAM 3 Bolt Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Material Aluminum Offset 3 Tooth