Originally Posted by
Bigbus
Try wiggling a crank arm and then the pedals. If nothing wiggles (no play) then I would be looking at the chain and cassette. Have you lubed the chain lately?
I recently got it back from a full tune-up at the LBS. I assume they lubed everything up. But you know what they say about assuming... I'll oil the chain again just to make sure. It only makes the noise on the down stroke.