Wolf Tooth Direct Mount Chainring - 32t, Shimano Direct Mount, Drop Stop B, Boost, 3mm Offset, BlackWolf Tooth chainrings designed for Shimano direct mount cranksets. This chainring is crafted with premium 7075 T6 aluminum and features the patented Drop Stop design for the best wear life, chain retention and mud clearance. Drop Stop B chainrings are designed for use with all 9, 10, and 11 speed chains or 12 speed SRAM Eagle, SRAM Road and Tranmission (T Type) Flattop Chains, KMC, Connex, Campagnolo or Wippermann chains Not compatible with 12 speed