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Old 01-14-16, 11:15 PM   #1
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Campagnolo 980 derailleurs - indexing compatable?

Hi folks,

I recently inherited a Campagnolo 980 derailleur set which was taken off of an 80s road bike that was upgraded to index shifting. These are in very good condition and, as I understand, they worked very well in their day. Has anyone tried these with index shifters? I have a couple of bikes that these would look nice on, but, if I'm going to change the derailleurs out, I would like to try using indexing shifters. I guess, I could just swap out the RD on my 7 X 1 townie, but I won't be home for another week and am looking for some inputs while I'm on the road.

Thanks and regards,

Van
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Old 01-15-16, 04:11 AM   #2
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ISTR the geometry is the same as (or very close to) Nuovo Record. I've never heard of that being used successfully in an indexed shifting setup. You could try, but don't be surprised if it's a miserable failure.

Why not just try a set of SunTour Power Shifters (which came in four setups, handlebar, stem, downtube, bar end), or the current Dia-Compe ENE (downtube or bar end)?
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Old 01-15-16, 08:54 AM   #3
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Won't work. The cable pull ratios are very different between indexed and pre-indexed derailleurs. This prevents, among other things, being able to use non-indexed campy shifters on an indexed rear in a pinch - the shifter just doesn't pull enough cable.
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Old 01-15-16, 09:17 AM   #4
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Originally Posted by ldmataya View Post
... The cable pull ratios are very different between indexed and pre-indexed derailleurs. This prevents, among other things, being able to use non-indexed campy shifters on an indexed rear in a pinch - the shifter just doesn't pull enough cable.
That's what SunTour shifters, with their larger capstan, are for.
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Old 01-15-16, 10:05 AM   #5
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If the OP is determined to retain the 980 derailleur and make it index, one alternative is to consider a set of Campagnolo Syncro or Syncro II levers with the appropriate insert. Campagnolo designed the Syncro levers to index several of their popular derailleurs that were originally designed for friction shifting. Among these were Super Record and Victory/Triomphe, which appear very similar in geometry to 980, so it may work. While Syncro was arguably the worst of the late 1980s indexed systems and can be quite hard/costly of obtain with correct inserts, this may be one of the OP's best options. For, reference, attached are the Syncro compatibility charts.
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File Type: jpg syncro2.jpg (90.0 KB, 4 views)
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Old 01-15-16, 05:52 PM   #6
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Wow, that's the first evidence I've seen that Campy ever tried to make a Nuovo-era rear derailer shift with indexing.

From what I have experienced with these derailer's shifting performance, I am certain that they work better in friction mode, no matter how good of a freewheel and chain were used.

True desperation on Campagnolo's part. I've never seen a single bike that had an indexed Nuovo derailer on it, though one used bike I bought had Ergolevers wired to NR derailers, which didn't work at all.

I imagine that with cable and B-tension adjusters on the derailer and using a corn-cob straight-block freewheel with modern cogs/chain, that it could be made to work well.

I would bet that the 980 derailer has the exact same cable pull actuation ratio as the NR. The 980 shifts well enough in friction applications.

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Old 01-17-16, 03:30 PM   #7
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Hi again,

Well, thanks for the feedback. It appears that my brain storm was more like something else. T-mar's chart was particularly interesting.

Regards,

Van
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