SRAM X-Sync 2 Eagle SL Direct Mount Chainring 36T Boost 3mm Offset, Black with Gray LogoIntense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer, runs quieter and further improves chain retention. Fully CNC Aluminum ring Eagle Technology tooth profile Additional CNC milling reduces weight by 8 10g from non SL version ring Recommended for XC Trail use Product Specifics Direct Mount Type: Direct Mount SRAM Tooth Count: 36 Drivetrain Speeds: 11 Drivetrain Speeds: 12 Defined Color: Black Material: