Okay, so I originally posted the following description of some intermittant pedaling noise ...
... and the consensus was bottom bracket needs replacement. I take it to the LBS, we wiggle the crank, yes BB has too much play, replace with new. No more play. Completely silent in LBS.
Take it out on a ride, and sure enough, when I'm pedaling slowly uphill under some load, there is a squeaky, chattering, fingernails on chalkboard sound that stops when I stop pedaling. For each complete rotation of the pedals, there are about 3 or 4 indistinct squeaks. Other people can hear it if they are riding next to me.
There is no noise when at higher speeds and same cadence -- only when the speed is under 10 mph.
Here's what has been ruled out:
- Chain is new and lubed
- Pedals have been replaced -- now SpeedPlay from DuraAce
- Cleats have been replaced
- BB replaced
- Chain not rubbing front derrailer
LBS thinks I'm psychotic, which I will be if I don't get this figured out. Any ideas?
Is it possible the BB housing is loose in the CF frame?