Wolf Tooth Elliptical Direct Mount Chainring - 38t, RaceFace/EastonCINCH Direct Mount, 3mm Offset, Drop-Stop B, FlattopDesigned for Easton 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 FT is compatible with all 10 , 11 , and 12 speed chains (including SRAM Flattop 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