Wolf Tooth 64 BCD Chainring - 28t 64 BCD Universal Mount Drop-Stop A BlackThe Wolf Tooth 64 BCD Universal Chainring is the perfect solution when you need something smaller than a 30t on your 104 64 BCD cranks or your 11 speed Shimano XT and SLX 96 64 BCD cranks. Features Wolf Tooth's Drop Stop tooth design for maximum chain retention For use with 1x9 1x10 1x11 and 1x12 drivetrains (including SRAM Eagle) Compatible with all 10 11 and 12 speed chains with the exception of Shimano 12 speed chains Shimano 12 speed chains