It was designed to fit a threaded socket, like a water bottle boss, fitted
directly into the side of the seat tube.
> Morning Folks,
> There is a Simplex/Spidel front derailleur on eBay (#1060781395) which is a
> braze-on, but as the seller states..."it will not fit a traditional braze-on
> I also have one of these (about 13 years now) and have wondered what it was
> designed to fit? Anyone know?
> Chuck Brooks
> Malta, NY