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Old 06-17-09, 01:49 PM   #1
athenstrestle
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Using oversized Front Derailleur

Hi everyone!

I am upgrading my bike and bought a used Ultegra front derailleur, not considering the size issue. Turns out the derailleur is for 31.8 mm tubing (1 1/4") while mine is 28.6 mm (1 1/8"). I saw an ebay add mentioning shims that can be used to adapt the 31.8 mm derailleur for the smaller frame tubing. Here's the link:
http://cgi.ebay.com/NEW-SHIMANO-ULTE...3A1%7C294%3A50

Ebay item number : 380128833518

Is this actually a viable option? It'd save me a heap if it was, but I don't want to Mickey Mouse this either! Thanks in advance for any input!
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Old 06-17-09, 01:54 PM   #2
Little Darwin
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The new Shimano derailleurs only come that way... 31.8 with a shim for 28.6, so it is either viable, or bikes that need a 28.6 clamp don't use a Shimano front derailleur.
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Old 06-17-09, 02:08 PM   #3
Panthers007
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A new Shimano I bought came with shims/clamps for all three sizes - 28.6mm up to 34.5mm. So you might ask your LBS if they have one kicking about. I'll bet they have a crate full.
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Old 06-17-09, 02:25 PM   #4
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It includes the shim. Shims are fine. You're good to go !
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