Intense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer, runs quieter and further improves chain retention. FEATURES: Fully CNC Aluminum ring construction Eagle technology provides an expanded, optimum, gear range for 1x drivetrains X-SYNC 2 chainring design increases chain retention, wear life, and reduces friction and noise Designed to be used with Eagle 12-speed chains SRAM Direct Mount Compatibility SPECS: Material: Aluminum Round or Oval: Round Chainline/Hub Compatibility: 141/148 Boost Hubs Direct Mount Type: Direct Mount SRAM Material: Aluminum Tooth Count: 36 Ring Position/Type: Single , Chain Retaining Single Ring Drivetrain Speeds: 12 , 11 , 10 Chainring BCD: Sram Direct Mount Offset: 3