[mrgold35]

I have the Ryobi P747 inflator with auto shut off. Just part of my routine of at home servicing to double-check the tire and spare PSI and adjust as needed. No more than 8-10 mins for 4 tires and around and the same to drop and check the full size spare w/ no TPMS. I set my full size spare to around 42-45 PSI since it will drop a few PSI a month and I only need to double-check a few times a year. I usually set my tires PSI 2-3 higher in winter because of morning-to-afternoon temp swings of 25-40 degrees F in early morning shade compared to afternoon direct sun (want to avoid TPMS warnings below freezing temps). Whatever the PSI in my heated garage usually means a lower PSI once I roll out and hit the road in winter temps. I lower the PSI to the recommend range in late spring and summer like temps (March to October months)

Never really thought about going with 100% nitrogen since normal outside air is already 78% nitrogen?