One fall I was up at Shanonville for one of the last track days before they closed the track for the winter and there were a few race cars running Pirelli P-Zero R-compound. During the day it was maybe 10 deg. or so but the previous night it had gone down below zero. Some tires had developed radial fissures in the sidewalls...
So, word to the wise, don't leave your r-comps overnight to freeze and then take them on to the track. It appears that they don't like it much. It may not happen with all makes and models but it's a pricey gamble to make. (especially in 17 inch)