Rear derailleur hanger bent in fall
I just fell off this morning on the ice and bent the derailleur hanger so that the cage touched the spokes on the 3rd largest sprocket. I have taken it off and straightened it and all seems to be OK now. However I stopped at an LBS on the way home and was told it would better to replace the hanger because the bent one could have been weakened.
Are these hangers deliberately made from very soft alloy so that they bend or break to protect the frame? Is the LBS advice correct?
Are the hangers made by the frame maker and only fit their frames or are there standard patterns?
Should I go to the LBS and make sure its properly aligned?
The parallel carbon plate on the derailleur took the knock and is slightly surfaced damaged is it likely to break on me?
Are these hangers deliberately made from very soft alloy so that they bend or break to protect the frame? Is the LBS advice correct?
Are the hangers made by the frame maker and only fit their frames or are there standard patterns?
Should I go to the LBS and make sure its properly aligned?
The parallel carbon plate on the derailleur took the knock and is slightly surfaced damaged is it likely to break on me?
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The LBS advice is spot on. Hangers are made to bend when you fall so that they protect the frame and the derailleur. Yes, you can straighten them but it is an imprecise job and they will be weaker as a result and may then fail. Your rear mech should be fine. Your problem is to find a matching rear hanger because there are scores of different types out there (some of which fit a range of frames). If you have a frame from someone like Specialized or Giant then you should be able to source one easily. If not, it's down to searching around. I had a similar problem a few weeks back and none of the major chains of shops could help. My LBS - with years of experience - solved the problem in about 30 seconds. There are companies making a wide range of hangers (probikekit sell some via their site) but you need to be able to match your hanger to the published pictures. Good luck.0
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You can bend them back straight depending on how badly it was bent by the accident. The problem is that if you have to bend them too much you can weaken th metal. My advice would be to buy a replacement, but the problem is which one. There are hundreds to choose from so getting the correct one can be a problem.
Yes. They are designed to bend in an accident. It's cheaper to replace a hanger than a frame.
Celeste is best
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The hanger is designed to fail to reduce the chance of damage to the frame. If it was bent significantly you should replace. Hangers are specific to the make/model and some vary by model year too. If the parellelogram is bent out of shape it might need replacing. If the damage is only superficial you should be fine.0
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If you're LBS can't help, www.betd.co.uk stock a wide range. Hangers are usually made from mild steel, so can easily be bent back into shape - your LBS should have the right tool for the jobMake mine an Italian, with Campagnolo on the side..0
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Monty Dog wrote:If you're LBS can't help, www.betd.co.uk stock a wide range. Hangers are usually made from mild steel, so can easily be bent back into shape - your LBS should have the right tool for the job
If you go to LBS make sure you take the bike, and not just the hanger. They'll need to see the hanger on the bike to straighten it correctly.
Celeste is best
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http://i190.photobucket.com/albums/z38/ ... ion005.jpg
http://i190.photobucket.com/albums/z38/ ... ion006.jpg
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http://i190.photobucket.com/albums/z38/ ... ion012.jpg0