Narrow wide chainrings compatible with Race Face CINCH system cranks. Direct mounting allows an easy switch between rings and spiders.Compatible with 9, 10, 11 and 12-speed (excluding 12-speed chains). Narrow Wide tooth profiling ensures consistent chain retention. Lockring installed/removed with ISIS BB tool. Stiff 4mm plate thickness to transfer loads without flexing. Item Specifications: Direct Mount Type, Direct Mount CINCH, Tooth Count, 34, Drivetrain Speeds, 9, Drivetrain Speeds, 10, Drivetrain Speeds, 11, Drivetrain Speeds, 12, Material, Aluminum, Ring Position/Type, Chain Retaining Single Ring, Round or Oval, Round, Offset, 3, Chainline/Hub Compatibility, 135/142 MTB Hubs, Chainline/Hub Compatibility, 170/177 Hubs, Chainline/Hub Compatibility, 190/197 Hubs, Chainline/Hub.