Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance.See below "Tech" link for known fitmentsOEM 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.These hangers DO NOT INCLUDE attachment hardwareCNC machined 6061 aluminumBlack anodized finishMade in the USA"FitmentCannondaleF-Si 29er Carbon / Alloy - 2016-2017F-Si Aluminum - 2015-2018F-Si Carbon - 2015-2018F-Si HM - 2015-2018F26 Carbon - 2013F29 Alloy - 2013-2014F29 Carbon - 2013-2014F29 Carbon 1 & 2 & 3 and Ultimate - 2013-2015Flash 29er Alloy - 2012Flash 29er Carbon - 2011-2012Flash Alloy - 2012Flash Alloy 29er - 2012-2013Flash Carbon - 2010-2012Flash Carbon 29er - 2012-2013Scalpel - 2011Scalpel 26 Carbon Series - 2011-2013Trigger 26 Carbon - 2013-2014" Wheels Manufacturing Hangers Requiring 2 Fasteners Derailleur Hangers UPC: 836572007761