Wolf Tooth Direct Mount Chainring - 30t SRAM Direct Mount Drop-Stop B For SRAM 8-Bolt Cranksets 3mm Offset BLKThese Wolf Tooth direct mount rings are designed for SRAM cranks with 8 bolt mounting. This chainring is equipped with the patent pending Drop Stop asymmetrical 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