Originally Posted by
indycycling
I have this Simplex front derailleur that I want to install on my Peugeot PR10 project that has a 28.6 OD Reynolds seat tube.
It's a braze on FD and the frame does not have braze on mounts. This FD doesn't work with the typical braze on adapters readily available. Looking for input on what I need here from the experts, thanks!
That type of derailleur uses a single threaded water bottle boss-type mount on the side of the seat tube as seen here:
https://www.flickr.com/photos/jhvu/8532767303
If your frame doesn't have one, you can either have a Riv-nut installed or have a boss brazed on, which of course will ruin the paint. If I were you I'd find a clamp-on derailleur and sell that one to someone who needs it. I have never seen a clamp-type adapter for that kind of derailleur.
By the way, what year of
PR-10 do you have? I would be rather surprised to see one without metric tubing.