Dropstop Cinch Direct Mount ChainringsDesigned for Race Face CINCH cranks with removable spiders. This chainring features the patent pending asymmetrical Drop Stop tooth design for the best in wear life, mud clearance, and 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