The Wolf Tooth 76 BCD chainrings fit any SRAM 76 BCD spider or Specialized Stout crankset. - Features Wolf Tooth's Drop-Stop tooth design for maximum chain retention - 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 - Made from 7075-T6 aluminum for long life