Originally Posted by
gravelinmygears
It's funny that you ask....this discussion got me thinking about another bike that has a non-period rear derailleur - my late 70s / early 80s Ritchey road. All Campagnolo except the rear derailleur is a Deore XT. Shifts great but I'm thinking I may try something different on there.
The bike I originally posted about is a Cinelli SC that I'm building up from the frame. Most of it is Campy NR but I'm straying from the narrow freewheel.
I'm thinking in needs to be Campy on a Cinelli. Period correct would be the Rally or a NR/SR with a long cage (based on the modifications by Spence Wolf at Cupertino Bike Shop). I started off with a SOMA long cage adapter on a NR. It worked OK. Then I acquired a Rally. I like it a lot better, it may be my set-up but I find it tracks closer to rear cogs and shifts better that the NR with a long cage.