Wolf Tooth 104 BCD Chainring - 36t 104 BCD 4-Bolt Drop-Stop B Black. 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. 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 Drop-Stop B chainrings are compatible with SRAM T-Type Transmission Flattop Chains Shimano 12-speed chains require the use of Wolf Tooths 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 TECH SPECS Color Black Ring Position/Type Chain Retaining Single Ring Tooth Count 36 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 104 Material Aluminum Defined Color Black keyword search SRAM T-Type keyword search SRAM Transmission