Hi
The Porta Catena (no 'g') lever has a little alloy finger trigger alongside the normal lever which releases it, to go backwards to allow the rear gear mech more travel, thereby moving the chain onto the half moon hanger to allow quick removal of the rear wheel. Naturally, it was developed for rapid wheel chnages in races.
I have had them in the past and they work well.
Derek Athey Honiton, Devon UK
On Sat, May 15, 2010 at 5:36 AM, r cielec <teaat4p@yahoo.com> wrote:
> Ahoy !
> Well, I hope I spelled correctly.
> First-off: I am open and inviting of all corrections and enlightenment.
>
> I understand the porta categna was the "extra gear"; that is: one merely
> shifted as if onto an additional cog. Where the pc's intended to be used
> with 5 or 6 spd fw's?
>
> Also, my understanding is that the shift lever used with the porta categna
> was a special lever having more travel. Is this correct? Do they look any
> different from the "non-pc" lever? Does anybody have one, actually seen one,
> use one?
>
> I have the half-moon for the rear drop out but, "ain't" never seen the
> lever.
>
> Thanks.
>
> Richard Cielec
> Chicago, Illinois; U.S.A.