Marin Novato, Argon Krypton, Jamis Aurora, IRO Mark V
CF frame flexing?
Lately I've been hearing creaking sounds from the crank area of my Carbon fiber Argon Krypton. I just replaced the Truvativ crank with a Ultegra so I don't believe it to be a crank problem but perhaps just the sound of the frame when under strain from aggressive pedaling? Could it be a bearing issue?
Sounds like the last change you made was with the cranks. You don't mention crashing, unusually severe chain drops, etc. Since something changed (you didn't have a creak and now you do), I'd look at any recent changes. In other words, I'd double check the crank installation.