Originally Posted by
davei1980
24 tooth difference (12-36t, 9 speed, not too radical at all) max wrap capacity for RD M592 is 45, well within specs
Spec's that would have been useful if included in your 1st post.
You could shorten an inch although no real reason to do so.
Comparing to your 1X12 would require the same kind of info.
RDER mounting geometry may not be exact between the 2 either. One of the reasons Shimano tends to be conservative in their spec's.