i have the 26 xtr and they dont rub at all but you get no traction in reverse so once your stuck your stuck no getting out backwards
I am runnung the 27 inch xtr and get a little bit of rubbing if my wife is on the back. However in reverence to their performance....I am nothing but pleased and have experienced the opposite. They aren't "unstoppable", but I have had they perform pretty **** good .i have the 26 xtr and they dont rub at all but you get no traction in reverse so once your stuck your stuck no getting out backwards