34.8 Clamped-on front derailleur on 31.8 seat tube, possible?

Discussion in 'Road Cycling' started by MultipleFostion, Oct 7, 2009.

  1. MultipleFostion

    MultipleFostion New Member

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    Hi all,

    Next week I'll probably buy a new frame to replace my creaking old one, but the Look I'm considering has a 31.8 mm seat tube and my front derailleur, still quite new, has a 34.8 mm clamp. Should I buy a new derailleur, or I should just fill the empty space with a rubber sheet? Will I find geometry or adjustment problems? Any experience or feedback about this case will be much appreciated...
     
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  2. Pkumble

    Pkumble New Member

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    Buy a new one. Consider how much you paid for the Look frame. Sell you old one on EBay.
     
  3. alienator

    alienator Well-Known Member

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    Which Look are you considering?
     
  4. synjen

    synjen New Member

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    You should be able get some shims at your bike shop they normaly come with an xtr derailure but work fine for any derailure
     
  5. OldGoat

    OldGoat New Member

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    Just buy a replacement derailleur clamp of the right size. They're readily available. Then unscrew your existing der from its clamp and attach to new clamp. 60 seconds/done! No shims, no nuthin'.

    You asked this exact same question back on 10-8-2009, and got the same answer(s) then:
    http://www.cyclingforums.com/cyclin...front-derailleur-31-8-seat-tube-possible.html

    So...why the new thread? And by the way, IMV this topic really should've been posted under "cycling equipment"--where you posted it last time; and if you'd searched there, you'd have found prior threads on this exact topic, along with links to sites where replacement clamps can be purchased.
     
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