Oval direct mount single chainring compatible with Sram crankset and Boost 3mm.frame (148mm.rear axle) and 52mm.chainline.Compatibility:-For Boost frames:3mm.offset and 52mm.chainline or drivetrain compatibility with Super Boost bikes.-Attachment by 3 bolts on the back of the spider near the axle.Use the same 3 original Sram screws to attach the Wolf Tooth chainring.-With Praxis Works mountain cranks using a 3mm.offset.-With Cane Creek eeWing cranks.-Chain compatibility:Drop-Stop ST for Shimano Hyperglide+ 12-speed and KMC 12-speed chains.Not compatible:-NOT compatible with SRAM 8-bolt direct mount cranksets.-NOT compatible with other chains.-Chain Compatibility:Drop-Stop ST for Shimano Hyperglide+ 12-speed and KMC 12-speed chains.Recomm.endations.-The use of a clutch style rear derailleur is recomm.ended for best chain security.-A T25 Torx spanner is required to remove the bolts holding the chainring or spider to the crank.-An L-wrench works best as the crank shaft may contact a bushing adapter and prevent proper engagement.-Use the same 3 original Sram bolts to attach the Wolf Tooth crankset.Features:-Use:Mtb.-Mounting:Direct Mount.-Ovality:10% Ovality:10% Ovality:10% Ovality:10% Ovality:10% Ovality.-Chain compatibility:Drop-Stop ST.-offset:3mm.-For 148mm.rear axle.-chain line 52mm.Weight according to sprocket:28t - 60g.30t - 68g.32t - 74g.34t - 83g.36t - g.-Material:Aluminium 7075-T6.-Made:in the USA.