Originally Posted by
operator
Not necessarily, I have experienced something quite similar recently on a shimano nexus hub. Properly adjusted and everything. You can feel a "rumble" through the drivetrain.
Yep, I had that feeling with a SRAM Spectro gear hub. I did have it with other bikes too, and to the best of my knowledge, after extensive analisis of the bikes, I am fairly sure it wasn't the pedals or the BB or the rear hub. Or the chain. This would happen with various newnesses of chain, and with various tensions of the chain. No direct correlation to any of them.