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Oldest Indexable Campagnolo Derailleur

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Oldest Indexable Campagnolo Derailleur

Old 11-11-18, 01:22 AM
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jyl
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Oldest Indexable Campagnolo Derailleur

For some reason, I started wondering: what is the oldest Campagnolo rear derailleur that anyone has managed to index properly with some flavour of Campagnolo Ergo brifter?

E.g., with J-tek adapters or other tricks, is it possible to index shift a Nuovo Record?


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Old 11-11-18, 02:51 AM
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Oldest Campy that worked with indexed levers (Their Synchro levers) derailleur was the 1st Gen Chorus that I think, came out around 1988.
Have not heard of anyone trying to use indexed shifters on an older NR or SR derailleur, but I suspect it could be made to work somehow, with the right set of indexed levers and a lot of fiddling.........and patience.
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Old 11-11-18, 04:26 AM
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I tried the 1st gen Chorus A-B rear derailleur (7 speed) with 1st gen Ergopower levers (8 speed). No dice. There was too much tension in the cable in the lower half of the cassette and it just pulled out of gear.

I tried both A & B settings, although I only tried the B setting in the work stand - I could tell it wasn’t working.

So to answer your question it would be the 8 speed Record or Chorus rear derailleur.
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Old 11-11-18, 05:05 PM
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Yep, I found out the hard way ,. Synchro 2 (7 speed) used Inline parallelogram RD and 8 speed (ergo) uses slant parallelogram RD. I tried using 8 speed Ergo shifters with my 7 speed RD, and was very fussy shifting., between 3-6 cogs. Found a racing triple RD and shifting 7 speed is smooth as silk. (with 8 speed Ergo shifters). KB
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Old 11-12-18, 04:29 PM
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Originally Posted by jyl View Post
For some reason, I started wondering: what is the oldest Campagnolo rear derailleur that anyone has managed to index properly with some flavour of Campagnolo Ergo brifter?

E.g., with J-tek adapters or other tricks, is it possible to index shift a Nuovo Record?


As Chombi1 says, with a lot of patience and fiddling, maybe a NR or SR could be made to work but there are a hell of a lot of variables:
5, 6, compact 6, 7 or if the RD spring is up to it, 8s?
Whose sprocket spacings? They were by no means standard.
Which chain?
Which ratios?
What dropout?
The best bet would be with close rings, like 48/52 (the wider the ring spacing, the more the change in chain tension and the shift away from the sprockets the upper jockey does, as you go from ring to ring) and close sprockets so that the gear will track the "shape" of the cassette better - an inline parallelogram doesn't track like a slant parallelogram which is part of the reason that C-Record RDs for example, don't index very well. The hanger needs to be short enough to bring the upper jockey as close to the sprockets as possible. Different chains are differently flexible and that affects the degree of "overshift" needed, which is set in the lever - when Campagnolo made Synchro1 and Synchro2, they had varying inserts (which gave the index interval) according to the chain / gear / block combination.
Maybe an interesting project for those long winter evenings but I'd say it could be a pretty frustrating one ....
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