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

[MultipleFostion]

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...

 

[Pkumble]

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

 

[alienator]

Which Look are you considering?

 

[synjen]

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

 

[OldGoat]

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.