1. Will vary a bit by derailleur manufacturer, each will tell you how to properly size the chain for their product.
2. Not sure I understand the question, assume you'll just be swapping the entire derailleur?
3. I ran 50/34, 11/25 (10sp) for a long time with a medium cage derailleur. I recently changed out the rear cassette for a 12/27 to make it a little easier on my legs climbing the hills we have around here. Both work fine.
BTW - I don't find cross-chaining to be a big deal running a compact setup.
Originally Posted by
solarpos
Hi~ I have currently the following setup:
Campag 9 Speed Record rear mech with short cage (RUNNING 10 SPEED btw)
11-25 Cassette
50/34 chainrings
I believe I have too long of chain wrap for my rear mech (30) and need a medium cage for better shifting and possibly less cross chaining. So, here are my many questions....
1. Generally how much longer of a chain is needed for going from short to medium cages?
2. What parts besides the two halves of the cage do I need for the rear mech? I assume I can go Chorus instead of Record for $$ savings?
3. Is anyone here running this setup, meaning medium cage, 10 speed 11-25 50/34?
Thank you for your help!
-solarpos