Originally Posted by
zymphad
I had the same. I had some dude telling me it was cause chain was rubbing on the FD due to frame flexing. Yeah that was BS.
I took the crank off and tightened up the chainrings and replaced the BB Bearings, they were 3 years old. Grinding noise stopped. He was right the chain was grinding on the FD, but not because of frame flexing.
Edit: Glad you fixed it.
Yeah, my first thought was that the FD was rubbing (that was a huge problem when I had Sora triple on my first road bike). I kept a close eye on it and the FD was dead center and there was no flex of the frame. I guess sometimes it's the simple solution that gets the job done. "Have you lubed it" is the biking equivalent of "have you rebooted your computer".