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What is the bit twix a carbon frame and the rear derailleur called, measured, bought?

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What is the bit twix a carbon frame and the rear derailleur called, measured, bought?

Old 05-17-13, 07:30 PM
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timtak
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What is the bit twix a carbon frame and the rear derailleur called, measured, bought?

I changed my own chain. Made it too long. The chain got caught up in the rear dérailleur and the small roughly triangular bit of metal upon which the rear derailleur hangs, between the frame and the derailleur (from which the derailleur hangs) got bent. I need a new piece of metal.

Please will someone be so kind as to answer any of the following.
What is it called?
What is the important measurement?
Where can I get one?
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Old 05-17-13, 07:37 PM
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It is called a derailleur hanger, they're generally specific to a given model of frame, so you only need to know what frame it is. For replacements, contact a dealer for the relevant company or look online for a supplier.
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Old 05-17-13, 08:21 PM
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Thank you very much. I found one online immediately, but the shop does not ship to Japan so I have asked the bike (frame) manufacturer.
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Old 05-17-13, 08:51 PM
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Originally Posted by timtak View Post
Thank you very much. I found one online immediately, but the shop does not ship to Japan so I have asked the bike (frame) manufacturer.
If you can't find one locally, do you have a friend in Europe or the US who could order it and mail it to you?
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Old 05-17-13, 08:55 PM
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Here is a website that specializes in hangers: https://www.derailleurhanger.com/
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Old 05-18-13, 02:57 AM
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How badly bent? There's a tool that will both measure and bend the derailleur hanger so that you can get it in perfect alignment, but it can't be too badly bent. It's basically a crowbar with an adjustable feeler gauge at the end. You set it so that it just touches the rim, and then move it 180 degrees to the other side and measure there. If it doesn't touch the rim again you push or pull so that the hanger bends, until you get to 1/2 the distance back to the rim, then measure both sides again. Repeat if necessary.

https://www.parktool.com/product/dera...nt-gauge-dag-2
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Old 05-18-13, 10:14 AM
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There are hundreds of different ones.. literally .. if not too bent,
they can be straightened by a bike shop and re aligned,

even new ones are not guaranteed to drop in place aligned, and index-click shifting performance,
is dependent on that accurate alignment..
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