Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance.
These hangers DO NOT INCLUDE attachment hardware CNC machined 6061 aluminum Black anodized finish Made in the USA See below "Tech" link for known fitments Fits Brand: Gary Fisher , Trek Tech:Gary Fisher 2012 Cronus CX ProGary Fisher 2012 Cronus CX UltimateGary Fisher 2012 Cronus CX Ultimate FramesetGary Fisher 2012 Ion CXGary Fisher 2012 Ion CX ProGary Fisher 2012 Ion CX Pro FramesetTrek 2010-2011 Cronus (Road)Trek 2010-2011 Ion (Road)Trek 2010-2011 Madone 6 SeriesTrek 2010-2011 Speed ConceptTrek 2010-2012 Fisher CronusTrek 2010-2012 Fisher IonTrek 2011 5-series MadoneTrek 2011 Madone 5 seriesTrek 2011 Speed Concept 2 SeriesTrek 2011 Speed Concept 7 SeriesTrek 2011 Speed Concept 9 Series Bicycle manufacturers may make mid year changes. Wheels Manufacturing Derailleur Hanger - 158 As a result, you will see many bikes with exactly the same hanger.Please use the hanger photos to select the proper hanger for your application. OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China.