Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

chorus 9 speed rd - exa drive

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

chorus 9 speed rd - exa drive

Old 08-05-14, 09:15 AM
Senior Member
Thread Starter
Join Date: Jan 2013
Posts: 215
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
chorus 9 speed rd - exa drive

Am looking for a 9 speed campy rear dear compatible with 2000 record levers. The auction site lists a "NOS CAMPAGNOLO CHORUS 9 SPEED REAR MECH, EXA DRIVE ".
I have a question sent to the seller, but in the meantime am confused about the exa designation. It does suggest an older der, but AFIK, exa is a freehub nomenclature. Input?
rdtindsm is offline  
Old 08-05-14, 10:38 AM
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 36,049

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 121 Post(s)
Tagged: 1 Thread(s)
Quoted: 4331 Post(s)
Campagnolo changed the RD geometry in 2000, and the difference is clearly visible. The RD's made until 1999 had a fixed stop on top and a stop cam with the typical B-screw adjustment. Starting in 2000, with the introduction of 10s, the entire line changed to a double spring system without a B-screw. The mounting angle was adjusted by changing the relative tension of the lower and upper springs, via a worm gear screw on the lower body.

I tried finding photos showing the difference but couldn't quickly find any that showed the are clearly enough. You'll certainly know if you have it in your hands, but might ask the seller about the B-screw and the answer should make it clear which he's selling.

Edit-- I later found this photo of a later carbon Chorus RD clearly showing the angle adjustment on the bottom.
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.

Last edited by FBinNY; 08-05-14 at 10:42 AM.
FBinNY is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.