I've got an issue with my Paul rear hub that I'm having trouble diagnosing. Maybe it's not the hub, but I think it is.
Only when I'm riding and only when I'm cranking pretty hard I hear a periodic metallic thud sound coming from my rear wheel area. It isn't loud but it is pretty audible. I cannot seem to make the sound happen at lower speeds. Because I need to be moving and working to make the sound it could be from my cranks or bb or something else, too, I suppose.
I'm wondering if this is the sound of my bearings dying.
Paul high flange, new chain, Sugino 75 cranks and Sugino bb.
I'm taking it to get looked at tomorrow, but I wondered if anyone here had any ideas. thanks.