Originally Posted by
pgjackson
My bike is making a grinding/scraping noise on the downstroke on both sides. If I coast and pedal lightly the noise stops, When I start applying pressure to the pedals again the noise comes back. Does this sound like a BB issue?
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.