"Robert" <[email protected]> wrote in message
news:[email protected]...
> Where online can I fine the capacity of particular Shimano front
> derailleurs?
> The max & min tooth counts and travel if possible.
>
> Thanks Robert
>
Robert wrote:
> Where online can I fine the capacity of particular Shimano front
> derailleurs?
> The max & min tooth counts and travel if possible.
>
> Thanks Robert
Robert wrote:
> Where online can I fine the capacity of particular Shimano front
> derailleurs?
> The max & min tooth counts and travel if possible.
>
> Thanks Robert
Both the two posts list good but conservative information. Derailleur
listed capacity are often much lower than actual practice.
Qui si parla Campagnolo wrote:
> Robert wrote:
> > Where online can I fine the capacity of particular Shimano front
> > derailleurs?
> > The max & min tooth counts and travel if possible.
> >
> > Thanks Robert
>
> Both the two posts list good but conservative information. Derailleur
> listed capacity are often much lower than actual practice.
So, are you saying that one listed as 42T would function properly with
a 48T ring or ?????
Robert wrote:
>
> So, are you saying that one listed as 42T would function properly with
> a 48T ring or ?????
>
> Thanks
Sort of. A derailleur designed for a 42t chainring will need to sit
higher above the big chainring than one meant for a 48t ring, due to
the curvature of the cage. You might not be able to make a "48t"
derailleur work well on a bike with a 42t ring since "48t" derailleurs
tend to have longer cages and could interfere with the chainstay.
I think Pete's point is that, if you're willing to avoid extreme gear
combinations, you can exceed the capacity by a good bit. For instance:
I have a Shimano FD-R443 front derailleur on one of my bikes: http://harriscyclery.net/page.cfm?PageID=49&action=details&sku=FD4436 .
It's listed as "22t capacity". Nevertheless, it shifts my 26/39/52
chainrings just fine- a 26 tooth span.
