Wolf Tooth 110 BCD 5-Bolt Drop-Stop ST chainrings are manufactured using premium 7075-T6 aluminum and designed for use with Shimano HG+ and KMC 12-Speed chains. These chainrings are optimized for Gravel, Cyclocross and Road disciplines.Wolf Tooth's patented Drop-Stop ST wide/narrow technology provides maximum contact on the drive side of the wide teeth to spread the load and improves chainring lifeNarrow side allows clearance for mud and debris which reduces frictionAlternating wide/narrow tooth pattern prevents chain derailmentCompatible with Shimano HG+ and KMC 12-Speed chains onlyRequires 6mm chainring bolts (Sold Separately)Item SpecificationsChainring BCD110ColorBlackDefined ColorBlackDrivetrain Speeds12MaterialAluminumRing Position/TypeChain Retaining Single RingRound or OvalRoundTooth Count42 Wolf Tooth 110 BCD 5-Bolt Gravel/CX/Road Chainring for 12-Speed Shimano HG+ Chain Chainring UPC: 810006809206