Improve shifting accuracy with a new Derailleur Hanger with 1 Fastener. Wheels Manufacturing Derailleur hangers come with the required hardware to attach to the frame.. Made in the USA. CNC machined 6061 aluminum. 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 or click on the “Tech” box below for a list of know fitments.. Black anodized finish. See below “Tech” link for known fitments.