Originally Posted by
hkboy313
here is what i did tonight. i didnt take the pedals off cuz it was pretty snug already. i took the chain off the crankset and cycled the pedals. i spun the pedals too, no sound, perfectly quiet. i didnt ride the bike yet...t-storming as we speak...i think it may be ok for now, but when i start actually riding it thats when it will start the 'thudding' feeling...
thanks again for your suggestions!
It could be that it only does it under load. When I spun my crank without the chain it wasn't very noticeable but it wasn't spinning as well as it should have been. I actually put my ear up to the frame when I spun it and I could kind of hear a sort of crunching/grinding noise. Ended up being water in the BB which was causing the bearings to go bad.
This may not be your problem but it's something to think about if you only notice the problem when you are pedaling.