Found this study on the internet....
I checked with Neal Haas, an engineer at True Temper’s research facility in San Diego. He used to work in the aerospace industry before working for True Temper and is an engineering genius. He said:
“CF (carbon fiber) components are used extensively in launch/reentry vehicles and satellites where the temperatures range from superheated to near absolute zero. The ultra low CTE (Coefficient of Thermal Expansion) of carbon fiber make it ideal for these temperature extremes. I find it very hard to believe that a bicycle sustained damage during winter storage in a cold garage – regardless of the earthly location. I have seen “green” (not fully cured) paints and top coats crack in extreme temperature conditions but never a CF composite structure.
The expert at Ball Aerospace is correct regarding micro-cracking but failed to mention that only micro changes in stiffness would result. The modulus of resin is significantly smaller than the modulus of CF. Therefore, slight degradation of the resin, while real, would be difficult to measure on a test fixture and would probably be imperceptible to the rider. Additionally, the resin comprises only 20-33 percent of the structure while 65–80 percent is CF. At this point you’re starting to multiply a lot of small decimals together ─ and the drop in stiffness is going to be very, very small.
As far as safe operating limits ─ I would worry more about high temperatures than low temperatures as the resin commonly used in sporting goods will slowly start to break down over a long period of time at temperatures above 220 F. I wouldn’t recommend riding in active volcanoes, reactor containment buildings or too close to the sun.” .... I have to think this would apply to pool cues/shafts as well, it really put things into perspective.
and sharp points.