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 drivetrainsCompatible with all 10- 11- and 12-speed chains with the exception of Shimano 12-speed chainsShimano 12-speed chains require the use of Wolf Tooth's Shimano 12-speed specific chainringsIf using a 9-speed drivetrain use a 10-speed chain which will provide a tighter fit for better chain retentionUse of a clutch-style rear derailleur is recommendedMade from 7075-T6 aluminum for long life