Wolf Tooth Direct Mount Chainring For SRAM 3-Bolt Boost Cranks Direct-mount rings are designed for use with SRAM cranks that utilize their 3-bolt mounting style. This premium 7075-T6 Aluminum Alloy chainring is equipped with the patent-pending Drop-Stop asymmetrical tooth design for the best in wear life, mud clearance, and chain retention. Features Compatible with all 10-, 11-, and 12-speed chains, except Shimano 12-speed chains Drop-Stop chainrings are designed for use with 1x9, 1x10, 1x11 and 1x12 drivetrains Made from premium 7075-T6 aluminum for durability and weight savings3mm offset is designed for boost cranksets (52mm chainline)SPECIFICATIONSDrive Train Speed1x9, 1x10, 1x11 and 1x12Tooth Count30T, 32TMaterial7075-T6 Aluminum Direct Mount Type3-Bolt SRAMChainline52mm Offset3mm Intended Use Mountain Weight-Chainline/Chainring Offset Guidelines Rear Spacing135mm / 142mm148mm Boost Super Boost 150mm / 157mm Fat Bike (170mm, 190mm, 200mm)Chainline48 - 50mm51 - 53mm54 - 56mm56mm+Chainring Offset~6mm~3mm~0mm~+2mm | Wolf Tooth Components | Direct Mount Chainring | Raw Silver | Sram Boost 30T Drop-Stop B