[RBW] Re: aluminum under front derailleur clamp

2019-03-27 Thread Jeremy Till
As Laing says, those are shims used to adapt front derailleurs with larger 
clamps to narrower seat tubes. If your derailleur is properly matched to the 
tube I wouldn't recommend using anything under it, just be judicious when 
tightening the clamp bolt.

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[RBW] Re: aluminum under front derailleur clamp

2019-03-27 Thread lconley
The shims are usually used to put a 31.8 derailleur on a 28.6 seat tube. 
(or a 28.6 derailleur onto a French 28.0 seat tube) Some manufacturers 
include shims with the derailleur. I used a cut down handlebar shim (26 - 
25.4) to put a Campagnolo derailleur on a Gitane.

Laing
Cocoa, FL


On Wednesday, March 27, 2019 at 8:27:20 AM UTC-4, jandrews wrote:

> Hi
> I often see some bits of aluminum underneath the front derailleur clamp 
> to presumably act as a soft shim to keep the seat tube from being 
> crimped due to over tightening of the clamp?.
> I crimped a seat tube before in the past and want to avoid that on my new 
> Appaloosa build.
> where does one find this stuff?  Is it a tape? or just strips of aluminum 
> that are cut to fit in the clamp?
> Thanks
>
>

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