c-record cable pull ratio

It isn't clear which rear derailleur you're talking about but if it's
the pre-Syncro II version it not only doesn't matter, it was variable
with the position and hence changed with the gear. And remember that
the Syncro II derailleurs were 8-speeds and I can't remember the ratios
but they were dead linear and I believe the latest 10 speed stuff ISN'T
linear pull.

"StaceyJ" wrote ...

Quoted message said:

I've been thinking about taking on a semi-restoration project for the
winter and had a (relatively) simple question. I've come across a very
good deal on a beautiful c-record rear mech, but would ideally like to
maintain compatibility with my 10s wheels. Does anyone know what the
cable pull/travel ratio is for the old c-record (circa 86) rear der?

Thanks,
SYJ

I recall C-Record derailleurs of that era being very pretty to look at and
very well made, but they really didn't handle 7-speed index shifting very
well, let alone 10 sped. This was back when Campagnolo still regarded index
shifting as something for inexperienced riders, and they were still trying
to make an index shifting system that could be retrofitted onto older
derailleurs.
--
mark

Hmmm...OK, simple question then - would a set of DT shifters (old or
new) have enough cable pull to shift across 10 speeds? Any in
particular I should look for/avoid? If possible, I'd like to stick
w/Campy throughout (purely for aesthetic reasons), although I am not
terribly worried about mixing years.

mark said:

I recall C-Record derailleurs of that era being very pretty to look at and
very well made, but they really didn't handle 7-speed index shifting very
well, let alone 10 sped. This was back when Campagnolo still regarded index
shifting as something for inexperienced riders, and they were still trying
to make an index shifting system that could be retrofitted onto older
derailleurs.
--
mark

BTW, I meant DT shifters in friction mode

SYJ

"StaceyJ" wrote ...

Quoted message said:

Hmmm...OK, simple question then - would a set of DT shifters (old or
new) have enough cable pull to shift across 10 speeds? Any in
particular I should look for/avoid? If possible, I'd like to stick
w/Campy throughout (purely for aesthetic reasons), although I am not
terribly worried about mixing years.

I guess it depends on the shifters, doesn't it? I have the C-Record
retrofriction levers on an old lugged steel Marinoni frame that was
originally equipped with a 7 speed freewheel. When I upgraded to an 8 speed
cassette the levers pulled barely enough cable to shift across all 8 cogs. I
believe that the 10 speed cassette is the same width as the 8speed, it's
just that the cassettes are thinner and closer together and the chain is
thinner. So that makes the answer "maybe", but you're probably going to have
to adjust the cable position very carefully and learn to make very precise
shifts.
--
mark

StaceyJ said:

Hmmm...OK, simple question then - would a set of DT shifters (old or
new) have enough cable pull to shift across 10 speeds? Any in
particular I should look for/avoid? If possible, I'd like to stick
w/Campy throughout (purely for aesthetic reasons), although I am not
terribly worried about mixing years.

It is a question of the throw of the rear der...it will NOT index with
any click shifting shifter. But the 'stack' of a 10s cogset is not much
higher than an 8s speed fw or cogset. So, use a standard set of DT
friction shifters and it WILL travel all the way ftom small to big BUT
the clearances are so small, it is gonna be tough to accurately shift a
10s cogset. I suggest getting a Veloce 9s loose cog cogset, replace the
amber spacers with black 8s ones, use 8 cogs and THEN use the C-Record
rear derailleur and shifters. I use all C-Record stuff on my Merckx,
with a 7s freewheel, BTW-