Originally Posted by
pierce
hmm, if its happening TWICE per full turn of the crank (eg, once per pedal side), I'd be looking at the bottom bracket, and or crank-to-bb attachments.
is it sort of a "Crink" or 'creak' sound?
if i were to describe the sound its more of a clunk, similar to the sound when the chain engages the freewheel when you start pedaling from a stop or a coast. its not a creaking noise but more of a thump. when i first rode the bike i at first thought it was a distant hammering of construction workers. but i will test out your BB test that you mentioned.