Originally Posted by sillygolem

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.