This Wolf Tooth elliptical chainring's tooth profile was developed specifically for RaceFace CINCH Boost Cranks with use of a Shimano 12-speed Hyperglide+ chain.Elliptical chainring shape provides better efficiency in the recovery zone as well as increased traction thanks to consistent torqueCompatible only with Shimano Hyperglide+ 12-speed chainsFor use with any RaceFace CINCH boost crankset with 3mm offsetMaintains quiet and smooth performance of the Hyperglide+ drivetrain with exceptional chain retentionPrevents premature ring and chain wear that can come from non-optimized profilesFeatures Wolf Tooth's patented Drop-Stop wide/narrow tooth profile for the ultimate chain retention and mud shedding abilityMade from 7075-T6 aluminum for long life