Originally Posted by
the_mac
adjust your front derailer stops so that when in the big-small combo, you have minimal clearance between chain and the side plate of your derailer. Then your derailer will act as a chainguide.
Will do. I am pretty sure that is how it is set though...
Ok, I just thoroughly inspected my bike, and I am pretty positive there are not cracks or anything else. (There was a scratch on the BB that got me thinking though).
Soo..
Could the frames flexing under load be the cause of this?