The Wolf Tooth 104 BCD chainring for Shimano 12-speed Hyperglide+ chain is designed to fit any 104 BCD crankset. The tooth profile was developed specifically for Shimano's XTR, XT, and SLX 12-speed Hyperglide+ chain.Compatible only with Hyperglide+ chainsEngineered proprietary tooth profile maintains the quiet and smooth performance of the HG+ drivetrain with optimal chain retentionPrevents premature ring and chain wear that can come from non-optimized profilesItem SpecificationsChainring BCD104ColorBlackDefined ColorBlackDrivetrain Speeds12Ring Position/TypeChain Retaining Single RingTooth Count36 Wolf Tooth 104 BCD Hyperglide+ Chainrings Chainring UPC: 810006801088