I am having a real crisis. I have a trek 5200, from the day I bought the bike, when shifting from the big to small front rings the chain would be thrown off the inner ring. This could happen even when I was in the middle coggs on the back and big ring. I had mechanics look at it and tell me it was adjusted right, so I leaved with it shifting very lightly. I thought I would uprgrade to a new crank FSA team carbon and get a new chanin and cassett ( all DA 9). No luck, then I went to a new DA 10 speed FD. Here I am still riding cautiously when sHifting and still throwing it off. I have cheeper beater bikes with sora components that I feel more confidnet with. Any suggestions, or is this bike doomed. Maybe the fram is a defect or the chain needs some links added. I can't pinpoint the problem, but it is very frustrating and makes racing difficult because I am riding gears that are not as comfortable for fear the chain might go off when shifting. Thanks!