Narrow Wide Direct Mount CINCH Hyperglide+ Chainring FEATURES: Only compatible with Hyperglide + chains Designed for use with 12-speed Shimano drivetrains Narrow Wide tooth profiling ensures consistent chain retention SPECS: Round or Oval: Round Material: Aluminum Chainline/Hub Compatibility: 135/142 MTB Hubs , 141/148 Boost Hubs Direct Mount Type: Direct Mount CINCH Tooth Count: 32 Ring Position/Type: Chain Retaining Single Ring Drivetrain Speeds: 12