Until I saw this video, I had no idea what a derailleur hanger was, or what it did. It turns out to be a useful part to know about and is easily replaced if necessary...
Checking/replacing a drailleur hangerOne thought on “Checking/replacing a derailleur hanger”
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Well, it might be easy to replace, and then again it might not?
Firstly, there are many different shapes and sizes of hangers - just take a look at this St John Street Cycles page to get some idea of the number of variations - http://www.sjscycles.co.uk/page/find/?name=derailleur%20hangers&page=1
Secondly, some bike frames do not have detachable hangers - they are part of the metal work of the frame
Thirdly - there are probably other types as well, but my knowledge of bikes is limited
Hangers are not a problem for those with hub gears though 🙂
So if you are of a cautious nature, go and see what type of hangers are on your bikes and see if you can source replacements.