Featuring the proprietary mud clearing Drop-Stop tooth design, these rings are designed to fit any 104 BCD crankset. Made in Minneapolis, MN with exceptional chain retention in mind, these chainrings are best paired with a clutch-style rear derailleur. FEATURES: Drop-Stop chainrings are designed for use with 1x9, 1x10, 1x11 and 1x12 drivetrains Compatible with all 10-, 11-, and 12-speed chains, with the exception of Shimano 12-speed chains Shimano 12-speed chains require the use of Wolf Tooth's Shimano 12-speed specific chainrings If using a 9-speed drivetrain, use a 10-speed chain, which will provide a tighter fit for better chain retention Use of a clutch-style rear derailleur is recommended Made from 7075-T6 aluminum for long life SPECS: Material: Aluminum Round or Oval: Round Tooth Count: 36 Ring Position/Type: Chain Retaining Single Ring Drivetrain Speeds: 9 , 10 , 11 , 12 Chainring BCD: 104