For the last six rides or so, my bike starts creaking about an hour into my ride. It then gets progressively worse from there. Funny thing is, it never creaks at the start of the ride ... it is perfectly quiet until about one hour in, then it starts ... slowly at first, but loud as hell at about two hours. I have checked, torqued and greased everything I can easily get to, but even without so much as touching the bike between rides ... it will be silent until about the one hour mark. It is driving me nuts.