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  1. #1
    Ti Fighter growlgames's Avatar
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    Front Derailleur Follies

    I searched the forums but didn't find an answer. I already have a Dura-Ace FD with a 28.6 clamp that has been sitting around for a while. I need to put a FD on my Ghisallo frameset, but the seat tube diameter measures 34.9, and since Shimano does not make a clamp on this size, I understand that they recommend buying a braze-on + a FD adapter clamp that fits a 34.9. But before I go and buy a new derailleur, is there anyway that the clamps can interchange i.e. get an adapter clamp and use it on the Dura-Ace FD I already have? Or are clamp-on FD's fixed and non-interchangeable? Probably a dumb question, but I did my first century yesterday and now my brain doesn't work

  2. #2
    Senior Member sydney's Avatar
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    Quote Originally Posted by growlgames
    I searched the forums but didn't find an answer. I already have a Dura-Ace FD with a 28.6 clamp that has been sitting around for a while. I need to put a FD on my Ghisallo frameset, but the seat tube diameter measures 34.9, and since Shimano does not make a clamp on this size, I understand that they recommend buying a braze-on + a FD adapter clamp that fits a 34.9. But before I go and buy a new derailleur, is there anyway that the clamps can interchange i.e. get an adapter clamp and use it on the Dura-Ace FD I already have? Or are clamp-on FD's fixed and non-interchangeable? Probably a dumb question, but I did my first century yesterday and now my brain doesn't work
    You can't use what you have. A true clamp or band type shimano FD has the clamp fixed.

  3. #3
    Senior Member Retro Grouch's Avatar
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    35.0 is a fat seat tube! I don't know about Dura-Ace but Shimano does make a 35.0 front derailleur clamp that works with braze-on mount derailleurs. My Ultegra derailleurs will bolt right up.

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