Originally Posted by
dddd
The short cage on a mtb derailer is longer than on a similar road derailer. I've swapped them and the difference was there.
They are intended for use with triples, just not combined with the x-32t cassette in most cases.
Correct. I had the XT setup, and the box it came in specified "Medium". You had a very narrow window to get the wrap/capacity right, and I recall seeing what happened with too much/little chain for the setup. I wore mine out, and then went to a long cage XTR.