Originally Posted by
cudak888
Sideplate...do you mean the parallelogram plate, or the pulley cage?
If the pulley cage:
The NR cage plates (and for that matter, Rally), though different in geometry from second-gen SR, are interchangeable. Nothing except the cage plates need to be replaced - the threaded stud on the derailer that they fit on is identical throughout, and the spring location is the same as well.
One thing - your SR's parallelogram will swing farther forward then an NR if it is a second-gen. Unless it is a first-gen SR, in which case, the cages will be of identical geometry.
If the outer (or inner) parallelogram plate:
I know that they are replaceable, but I have never done so myself. I believe the SR-style expandable pins can be re-used, but the NR squash-fit are a different story. I don't know any more then this, sorry.
-Kurt
Thanks for the instant reply Kurt! Sorry, I should habe been clear - just woken up the day after Night shift! I was talking about the parallelogram plate, didn't think about the swing, so that's helpful. I'll see if I can collect the bits and line them up by eye. Great collection of derailleurs by the way!
Stuart