michaelson

Hi All,

I was hoping someone could tell me if this is a Chorus or Record Rear Derailleur and how you can tell.

I have owned this for a while and decided to sell it. I had always thought it was a and 8 speed Record and have been told that was the case, but received a message saying it was a chorus. I dont know how to tell. I dont want to mislead anyone in either case. thanks for your help.

https://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT

cpsqlrwn

RULE #1! If you're selling, it's Record, and if you're buying, it's Chorus!

Seriously, though, I would tend to think this is Chorus either because (depending on the year) the back plate does not have metal taken out to reduce weight or because there is a hexagonal nut at the bottom rather than a circular fastener which I believe was a Record characteristic. But hey, what do I know. If in doubt, refer to RULE #1!

stien

Not record in my totally not-expert opinion.

I had a record one and it had a different adjuster.

abarth

Chorus, not sure if it is even 8 speed.

RobbieTunes

Looks like a 7-sp pre-Ergo Chorus.
I have an 8-sp Chorus, and that's not it.

I used to have a 7-sp Chorus, and it looked like that.

That's all I know.

Bianchigirll 

it is the original Chorus from the late '80s early '90s. it is easy to tell because of the bolts that hold the two ends to the parrelallgram.

michaelson

Thanks for all of the replies. I may just post the link to this page with the ad. I guessing my lack of knowledge about the derailleur may lead to a low selling price. Oh well, its going right back into bike parts anyways.

conspiratemus1

It's the Chorus from the first half of 1988 or 1989, pre-8-speed, pre-Ergo. I have one. The large, partially recessed Allen bolt that you can just barely see holding the body to the parallelogram, on the right of the photo that Bianchigirl posted, is intended to allow the body to be "twisted" on the parallelogram to optimize it for close-ratio or wide-ratio sprocket clusters. Not all the catalogue scans on the web show this model because it was discontinued later in the year in favour of a non-twistable design that looks more like a Record.

Road Fan

Yes. Good shifting on sizes up to 7-speed 13-30 (ymmv!). I haven't used it in an indexing system, but it's better than a Nuovo Record on friction, but not as good as a Huret Duopar. I think it was an attempt to circumvent the patent on slant parallelograms (SunTour?), and add the feature of a variable range.

RobbieTunes

I used mine on a 7-sp indexed (Syncro 2) system, and the insert was wrong. I'm wondering if it could be adjusted with that allen bolt to work a little better. The shifting, in indexed, just wasn't perfect for the owner, though the previous owner, using the same group, had no problem.

Road Fan

The allen bolts allow you to rotate the cage and the mounting casting relative to the parallellogram assembly. You can set it up as either a straight parallellogram like a Nuovo Record that has been canted, or a slant parallellogram like a SunTour, modern Shimano, or modern Campagnolo.

I'm not sure what you mean by "insert," unless it's part of the shifter rather than of the derailleur.

DMNHCAGrandPrix

One of these derailleurs came on a 1988 Bianchi I purchased last year. Campy's original instructions recommend using it in A position (straight parallelogram) for shifting across corncob freewheels, and B position (slant parallelogram) for shifting across freewheels with a big difference between low and high cogs. If the total tooth spread between large and small freewheel cogs was 11 teeth or less, the recommended position was A. If the total spread was 12 teeth or more (or the large cog had 28 teeth or more), the recommended position was B. I have found this a versatile derailleur that has been able to shift across freewheels as large as 14-34. (It helps that it was also Campy's first modern derailleur with a separate B angle adjustment screw, making it possible to adjust the hang angle between the derailleur body and dropout, as well as the slant angle of the parallelogram). The colored inserts were for the Syncro shifters, not the derailleur. Different colors were recommended for 6 speed or 7 speed, and for using the derailleur in A mode or B mode. See
https://www.cadre.org/bike_stuff/Camp...moresyncro.jpg

Road Fan

Hmmm, I like my Chorus, I wonder where I can get some of those adjuster inserts?

DMNHCAGrandPrix

Yellow Jersey doesn't list the Syncro inserts on their web page, but they did have different inserts in stock when I emailed to asked them last year (mail@yellowjersey.org).
Price was high enough for a specific insert ($39.95) that I just ran the Syncro shifters in friction mode until I found someone with some old Campy parts at a local bike sale.

Road Fan

Thanks, D!

RobbieTunes

I bought an '89 Chorus group, which came with Syncro levers and a blue insert.
The previous ower is a experienced rider and had no problems using them on a Raleigh Team Pro.
He had them adjusted just right, and on a couple of the middle cogs, you can overshift a bit and then back down.

I mounted the entire group on a rebuilt Cinelli, and the owner stated it wasn't indexing right. His LBS said it was the wrong insert.
I couldn't find the appropriate insert per the chart; and it was easier to find the right RD (Athena, long-cage Croce, Super Record).
So, I bought an Athena and mailed it to the owner, with instructions to swap RD's and he should be fine, per his LBS instructions.
I even called his LBS and confirmed all with his wrench. Well, he swapped, and now says the shifters "won't hold."
I have another set of the Syncro levers, and both a blue 7 and a yellow 6 insert. Not sure if it's worth sending to him.

Yellow Jersey, when the shifters won't "hold," simply files the indents a little sharper, which probably works as well.

Since the inserts would fit right into a R Ergo shifter of the 8/9 speed era, I've often wondered about setting up a set to run with pre-Ergo 7-sp and 6-sp setups.

Last I checked, one guy had a web site that showed he had almost all the inserts, and many copies. However, he didn't seem to be interested in selling any.