Nitrogen filled tires and summer heat
We are leaving this week for a 1300 mile trip west to California. Although I would prefer not to travel with the fifth wheel in the heat of July/August, it is for a family anniversary so I've got no choice. My question is this: We are taking I-40 to minimize the heat as much as possible, and will hopefully cross the desert in the early morning hours. But my new 323LKTS was purchased in March. The tires are filled with nitrogen, according to the dealer. What effect does tires filled with nitrogen have in the heat? I assume nitrogen would make them expand in heat more than regular old air. And what do I do if I need some topping off pressure wise on the trip? I don't think I can put air into a nitrogen filled tire, can I?
2015 Eagle 323 LKTS
2003 Ford F250 7.3 L Diesel