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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 03-29-07, 12:57 PM   #1
jerrymcdougal
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Such thing as a FD Clamp spacer?

I have a Ultegra FD with a 34.9mm clamp. My bike, however is a 31.8mm seat tube. Is there any spacers available on the market that will remedy this? I was thinking about using some thick rubber stripping (its from a cyclocomputer mount) to wrap around the seat tube to give me that extra diameter. Does that sound smart?

Thanks alot!

-Jerry
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Old 03-29-07, 01:26 PM   #2
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Yeah, my kid hauler has the same issue (though it's an MTB). I wrapped bike tube around the seat tube and clamped that. Flawless shifting for 8 months straight now.
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Old 03-29-07, 01:31 PM   #3
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Braze ons and adapter clamps are the way to go, IMO. I hate not being able to move parts around bikes.

Try this gizmo:
http://www.universalcycles.com/shopp...1&category=530

Last edited by barba; 03-29-07 at 05:41 PM.
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Old 03-29-07, 06:03 PM   #4
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I ended up with a new steel bike the year that Campy stopped making the smallest FD clamp in Record. Bought the next bigger one and clamped it with the rubber shim from a computer. Still working, 2000 miles later.
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Old 03-29-07, 07:30 PM   #5
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Great, thanks alot everyone, rubber shims it will be!
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Old 03-30-07, 02:37 AM   #6
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Quote:
Originally Posted by barba
Braze ons and adapter clamps are the way to go, IMO. I hate not being able to move parts around bikes.

Try this gizmo:
http://www.universalcycles.com/shopp...1&category=530

That is very useful. It's getting harder to source 28.6 ders anymore. Thanks for the link


Tim
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Old 03-30-07, 07:40 AM   #7
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Quote:
Originally Posted by cs1
That is very useful. It's getting harder to source 28.6 ders anymore. Thanks for the link


Tim
Braze on is the way to go, but I disagree with the 28.6 being harder to get?
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Old 03-30-07, 09:04 AM   #8
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Quote:
Originally Posted by oilman_15106
Braze on is the way to go, but I disagree with the 28.6 being harder to get?
FWIW, Nashbar has 28.6 braze-on clamp adapters for 2 or three bucks. I ordered a couple just to have around.
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Old 03-30-07, 09:38 AM   #9
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The Universal Cycles band clamp linked above is exactly what I need...except that I need to go from 31.9 to 28.6 and it looks like they don't carry that size. Anyone know where I could find one? thanks.
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Old 03-30-07, 03:31 PM   #10
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I had the same problem with a Shimano FD. But I learned something interesting, most of their FDs use the same style clamp. So I unscrewed the bigger one and switched it with the clamp from an older FD. It worked perfectly.
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