I ran mine in the 265/35 and 285/30 18 sizes in Texas and Oklahoma where the track temps run in 100+ degrees pretty quickly. Cold temps are really academic-when warm my set up was happy at 38-39. I checked the sidewall wear pattern to make sure I was just getting out the wear chevrons. I have pics of them in the for sale section. If you are too low with pressure you will roll over too much and the chevrons will show abrasions, if too high it wont roll over enough and your contact size will be too small. Cold temps for me on those hot tracks were around 34-36 but it varied so much depending on when I checked them. You will need to adjust them a lot to find your sweet spot. Good luck-love those tires.