I have a frame made of columbus ultrafoco steel tubing, with a columbus carve carbon monostay in the rear. When climbing out of the saddle in my 26 tooth in the rear, once every two pedal strokes, it sounds like the rear derailer is just barely making contact with a spoke... If I do it seated...nothing. I tried trimming the rear der out a little, but I don't want to mess up the shifting at all... I suppose its just something I need to live with...or shift to a higher gear when standing....but I thought I would throw it out there.