Originally Posted by
ReidH
One method to reinstate a Rene Herse front derailleur to a tandem that has had it sawn off is to build a clamp on version. There are pictures of an very early Herse tandem in Jan Heine's Rene Herse book of just such a thing. To add to that, I have pictures of just that sort of clamp on derailleur taken off a Herse. Maybe the same derailleur as the pictures. It appears to have many adjustment features that the brazed on versions didn't, which leaves me to believe it was a prototype or designed to be more flexible to changes in chainring size.
The pic's are from Ebay. I wish I won that auction. I need one for my Herse tandem that suffered many desecrations in it's life.
Reid
That's a very cool thing. I love that you can see the machining in it. You can see how on that eye that attaches the cage to the push rod, he started with a round hole and broached it square! Amazing.
Wait, am I going to get roped into building these?
I just did one for my Trek, but it was not an exact replica, because when I started building it, I hadn't yet gotten the real thing. It was pretty hard to do, but it shifts well.