Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance.Attaches to frame with M12 BoltFits YT models: Decoy MK1 (2019-2020), Jeffsy MK2 AL (2020+), Jeffsy MK2 CF (2019+), Primus MK1 (2020+)OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application.CNC machined 6061 aluminumMade in the USAItem SpecificationsFits BrandYT Wheels Manufacturing Hangers Requiring 1 Fastener Derailleur Hangers UPC: 811079029058