Originally Posted by 2bfree
AFAIK, rear deraillers don't care about indexing; that's the shifter's job.
They
do care about chain size, but chain size is the same for 5-8 cogs.
Sheldon Brown has lots of good info on this:
http://sheldonbrown.com/
Did you notice that Sheldon already replied to this post?
And also, I've detailed above that the rear derailler
does matter for indexing, because the amount of cable pull.