I have gone back to running everyday air in my tires vs. nitrogen. I was just having too much trouble finding places that could keep them up and the cost was too high. I bought a decent air compressor so I can get really good cold pressures at the house and I can keep it up on the road easier. NOW, my question, what is a cold pressure? It is 5 outside right now and if I check my tires they will all read low. Yesterday, while my truck was indoors for several hours and the tires where at about 65 they were perfect. If I bring them up today and head south tomorrow the pressure will be way too high at 60-70. I need input from those in here who know more about this than I do, which there are many. How do you handle it? Layoutshooter