I recently got a giant OCR 2 from a local sports store.
When I test rode it the largest chainring was hitting the bottom of the derailleur cage, so I had them fix that.
I figured the people doing it knew what they were doing, so I didn't bother testing it again before I left.
After I got it home I had to wait to ride it until the next day and then I also noticed that now the chain was also rubbing up against the inside of the cage when I would be in the middle chain ring.
I then brought it back to the place again (since it was free) and had them fix it.
I rode it that nite on a 6 - 8 mile ride and it shifted great, it was so smooth and quiet it was almost unimaginable.
One or two days later I went to ride it again and found out that the problem with the derailleur hitting the chain problem was back and then also now it won't shift to the largest chainring.
I was talking with my friend yesterday (who knows alot about bikes and repairing them) and he said the OCR 2 bikes are known for having a problem with the derailleurs and I should buy a different one.
I've pretty much narrowed my choices down to two:
1. Try to bring the bike back and get a different model
2. Buy a new derailleur and hope it works
I would, however appreciate some input.