Originally Posted by
JohnDThompson
Not sure, but most carbon frames are laminated. If the layers don't respond to temperature changes evenly, then delamination could happen. I don't know enough about the properties of carbon fiber bicycle frame materials to know if this is an issue.
CF experiences very little thermal expansion, so this isn't an issue.
I'm not sure about bike-specific grease, but most greases start having problems around -25 to -30F (-30 to -35C.) At this point the viscosity is around 100,000 cSt, which doesn't hurt anything if the bike sits, but makes turning anything very difficult. There are low-temp greases on the market for operating under these conditions.