The are 20 million billion theories you can get by googling nitrogen filled tires. Most are in reference to automotive tires and mixed reviews.
My question is a bit more specialized. We have load range G tires on our unit and they are running about 93% of full load capacity. With such a high loading does nitrogen help anything to keep the tires cooler and have a more stable pressure?
We have a TPMS system and can watch the pressure rise 15 PSI or more from cool morning start to mid-day interstate travel. My humble theory is nitrogen will keep the tire cooler and pressure lower, therefore a little deeper in the safety margin for tire failure. There must be a reason airplanes use it!