I am 280 lbs and have been having probles with ghost shifting on my trance. It only happens under hard cranking up hills. Does any other clydes have this problem. I have replaced chains, and cassettes, several times. I am still haveing the problem. My LBS said that the rear triangle might be flexing, causing slack in the rear derailer cable causing it to shift causing my problem. Any one having the same problem. He said the solution is full cable housing zip tied to the rear triangle.