Reexamining my many Simplex derailleurs, I find that rather than the female threaded collar, some have a male bolt that inserts from inside the DO and engages female threads in the upper pivot of the derailleur. In this case there is an unthreaded shoulder near the head of the bolt which fits the unthreaded Simplex or threaded Campy DO hole. The threaded part of the bolt does not engage the threads of a Campy DO, only the smaller threads of the derailleur pivot. So, with either variation, a Simplex derailleur works equally well with Campy or Simplex DOs. You need to determine whether the upper pivot of your Simplex derailler has a bolt or female threads to determine whether you need the bolt or the collar to fit on the inside if the DO.
Regards,
Jerry Moos
Houston, TX
> Per my earlier post, you need the female threaded collar that came with
all
> Simplex RDs which were installed direct to DO's. The collar slips into
the
> Campy DO and the hanger bolt threads into the collar. If your derailleur
> doesn't have the collar you can perhaps salvage one from a trashed Simplex
> derailleur or maybe someone on the list has a spare.
>
> Regards,
>
> Jerry Moos
>
> ----- Original Message -----
> From: "Doug Wagner" <doug@cis.uky.edu>
> To: <classicrendezvous@bikelist.org>
> Sent: Saturday, February 07, 2004 10:42 AM
> Subject: [CR]Re: old saw
>
>
> > Mes amis,
> > I have a bike with Campy dropouts on which I'd like to use a Simplex
> > rear derailleur; the Simplex has a removable "c-hook" for use, I
> > presume, on bikes without a hanger; can I use a Campy threaded screw
> > to attach it or are there other ways to do so? I'm not going to get
> > out the Sawz-All....or the francofile:)
> > Doug Wagner
> > Richmond, KY