Originally Posted by DannoXYZ
Tighten up the B-tension screw on the rear of the derailleur.
I have tightened the B-tension screw as much as it can go. It seems to be a bit bent, or at an angle anyway, so maybe the thing that it screws into is bent.
It appears that by removing the spacer from behind the casette, and thereby shifting the entire cluster towards the wheel by that small amount, might have done the trick. Its not riding as hard on the normal configurations. Of course, when I go to my granny up front and to the 26t on the rear, it still rides/hits big time.
Any other answers would be sooo sweet.