My race bike is a Klein Quantum.. As I turn the pedals , I infrequently hear a noise , sort of like a clunk and the pedal will seemingly advance a cog or two.. This happens irregularly . Maybe a couple times a ride. This might indicate what.? It's crank bearings have been changed once. Maybe like five years ago.. I ride my race bike far less than I do my commuter bikes. So in those five years, I have not put all that much mileage on it.
I told my shop's mechanic about the noise.. What I hear him say, wait until it gets worse. You advice. Thanks..