Clamp on front derailleur for a smaller seat tube

[Artoi]

Presently planning to move a triple groupset to a new frame I bought for
my wife. The problem is that the present triple FD is a clamp-on version
for 34mm seat tube and the new frame has 32mm tube. The possible
solutions are,

1) Find a collar insert of some sort to allow the FD to anchor to the
32mm tube.

2) Buy new FD.

Obviously I'd like to minimise the expenses and wastage of a perfectly
good FD. Anyone have any experience with solution one? Can it be done?
How can it be done well?

Thanks for any suggestions.
--

[Hank Wirtz]

On Dec 13, 3:20 pm, Artoi <ar...@hotmail.com> wrote:
> Presently planning to move a triple groupset to a new frame I bought for
> my wife. The problem is that the present triple FD is a clamp-on version
> for 34mm seat tube and the new frame has 32mm tube. The possible
> solutions are,
>
> 1) Find a collar insert of some sort to allow the FD to anchor to the
> 32mm tube.
>
> 2) Buy new FD.
>
> Obviously I'd like to minimise the expenses and wastage of a perfectly
> good FD. Anyone have any experience with solution one? Can it be done?
> How can it be done well?
>
> Thanks for any suggestions.
> --

I'd check with a bike shop. Shimano MTB FDs all come with such a shim,
so there's a good chance they have a few lying around.

If they don't have one handy, the one that comes with Deore FDs can be
ordered. QBP Part #DP6022. Probably about $10 from an LBS.

[A Muzi]

Artoi wrote:
> Presently planning to move a triple groupset to a new frame I bought for
> my wife. The problem is that the present triple FD is a clamp-on version
> for 34mm seat tube and the new frame has 32mm tube. The possible
> solutions are,
>
> 1) Find a collar insert of some sort to allow the FD to anchor to the
> 32mm tube.
>
> 2) Buy new FD.
>
> Obviously I'd like to minimise the expenses and wastage of a perfectly
> good FD. Anyone have any experience with solution one? Can it be done?
> How can it be done well?

Sure. Any piece of nylon or aluminum 1/16" =1.58mm thick will do. Or the
appropriate clamp liner (brand? model?). Or the appropriate derailleur
body. Or the appropriate derailleur.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

[Artoi]

In article
<145181f9-e42e-4327-893d-fc90cd17107f@d27g2000prf.googlegroups.com>,
Hank Wirtz <hank@wirtznet.net> wrote:

> On Dec 13, 3:20 pm, Artoi <ar...@hotmail.com> wrote:
> > Presently planning to move a triple groupset to a new frame I bought for
> > my wife. The problem is that the present triple FD is a clamp-on version
> > for 34mm seat tube and the new frame has 32mm tube. The possible
> > solutions are,
> >
> > 1) Find a collar insert of some sort to allow the FD to anchor to the
> > 32mm tube.
> >
> > 2) Buy new FD.
> >
> > Obviously I'd like to minimise the expenses and wastage of a perfectly
> > good FD. Anyone have any experience with solution one? Can it be done?
> > How can it be done well?
> >
> > Thanks for any suggestions.
> > --
>
> I'd check with a bike shop. Shimano MTB FDs all come with such a shim,
> so there's a good chance they have a few lying around.
>
> If they don't have one handy, the one that comes with Deore FDs can be
> ordered. QBP Part #DP6022. Probably about $10 from an LBS.

Excellent. Thanks for the tip. I'll have a word with my LBS and see what
they have. It's always good to go to your LBS knowing what's potentially
available.
--

[JeffWills]

On Dec 13, 4:52 pm, A Muzi <a...@yellowjersey.org> wrote:

>
> Sure. Any piece of nylon or aluminum 1/16" =1.58mm thick will do. Or the
> appropriate clamp liner (brand? model?). Or the appropriate derailleur
> body. Or the appropriate derailleur.

A short piece of Schedule 40 PVC pipe will do. I have one on my bike
to fit a front derailleur I bought online. I painted it black to match
my frame and it's just about invisible.

Jeff

[Artoi]

In article
<4159b7e8-6723-47ea-9cf7-2ca0c7024366@d4g2000prg.googlegroups.com>,
JeffWills <jwills@pacifier.com> wrote:

> On Dec 13, 4:52 pm, A Muzi <a...@yellowjersey.org> wrote:
>
> > Sure. Any piece of nylon or aluminum 1/16" =1.58mm thick will do. Or the
> > appropriate clamp liner (brand? model?). Or the appropriate derailleur
> > body. Or the appropriate derailleur.
>
> A short piece of Schedule 40 PVC pipe will do. I have one on my bike
> to fit a front derailleur I bought online. I painted it black to match
> my frame and it's just about invisible.

For those plastic shims, did you find it altered the rigidity of the
setup and affected the crispness of shifting?
--

[A Muzi]

-snip wrong front changer-

>> A Muzi <a...@yellowjersey.org> wrote:
>>> Sure. Any piece of nylon or aluminum 1/16" =1.58mm thick will do. Or the
>>> appropriate clamp liner (brand? model?). Or the appropriate derailleur
>>> body. Or the appropriate derailleur.

> JeffWills <jwills@pacifier.com> wrote:
>> A short piece of Schedule 40 PVC pipe will do. I have one on my bike
>> to fit a front derailleur I bought online. I painted it black to match
>> my frame and it's just about invisible.

Artoi wrote:
> For those plastic shims, did you find it altered the rigidity of the
> setup and affected the crispness of shifting?

No problems with Delrin or PVC.
A wad of duct tape won't work well despite its common use.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971