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  1. #1
    Senior Member Shilun's Avatar
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    Problem with built-in derailleur hanger

    The threads of the built-in derailleur hanger on my 1980s steel frame appear to have stripped, such that it's impossible to get the RD in tightly except at a slight angle. What's the best way forward from here. I was thinking of grinding off the hanger and replacing it with an adaptor. Does that sound reasonable?

  2. #2
    Peace and bicycle grease! une_vitesse's Avatar
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    Quote Originally Posted by Shilun View Post
    The threads of the built-in derailleur hanger on my 1980s steel frame appear to have stripped, such that it's impossible to get the RD in tightly except at a slight angle. What's the best way forward from here. I was thinking of grinding off the hanger and replacing it with an adaptor. Does that sound reasonable?
    replacing it with an adaptor is certainly a solution. if you can thread the derailer in all the way and have it be secure, you might also be able to "straighten" the hanger with the proper tool (park tool DAG-1). i put it in quotation marks because it wouldn't actually be straight, you'd only be aligning the threads of the hanger with the cassette.
    if you can't thread the derailer in all the way, then you might have enough good threads chase the cross threaded section.
    Ross Mt Hood
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  3. #3
    Senior Member Retro Grouch's Avatar
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    The simpliest solution is called a "drop out saver". It's a T-nut that is specially designed to replace the threads in your hanger. Bike shops should have them.

  4. #4
    Senior Member Grand Bois's Avatar
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  5. #5
    Senior Member
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    Try using one of these instead

    http://www.loosescrews.com/index.cgi...id=82363953897

    Edit: I see Dirtdrop beat me to the punch, and his is cheaper!
    Doug

    '72 Fuji Finest
    '06 Fuji Team Issue
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  6. #6
    Senior Member Retro Grouch's Avatar
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    bingo!

  7. #7
    Senior Member Shilun's Avatar
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    Thanks to one and all. That looks just the ticket. Never knew such a thing existed!

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