Campy Rear Derailleurs

Guy F. Anderson Sr. said:

I need to replace the rear derailleur on my Campy Ergo 7-speed system.
I have a 2003 Chorus 10-speed derailleur. Will it work,
or do I need to pop for a 7 or 8-speed derailleur?

Thanks

Guy A
Ripley, TN

Sure, just install, go ride. Use an 8s chain, no need to do anything
tom the pulleys.

Guy F. Anderson Sr. said:

I need to replace the rear derailleur on my Campy Ergo 7-speed system.
I have a 2003 Chorus 10-speed derailleur. Will it work,
or do I need to pop for a 7 or 8-speed derailleur?

You don't need to pop for a 7/8 speed rear derailleur in because there
is only a mino difference in the amount of movement from the older
models to current models
<http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946>. I'll sell you
an 8sp Record rear derailleur in excellent condition for your Chorus
10 rear derailleur and give you some cash too.