inflating tires on rv with nitrogen, good idea?

azdryheat wrote:
Regular air is 78% nitrogen. On that note, 100% nitrogen won't leak out of your tires as fast as air as the nitrogen molecules are larger. Nitrogen will also maintain a constant pressure regardless of temperature or elevation. I have no experience with nitrogen in my tires, I just carry an air compressor with me.

I am often surprised at the number of people saying air leaks out of their tires. I can see over time loosing air pressure do to constantly checking the pressure, or seeing the pressure decrease on a cool day, but I just can't buy into it leaking out through the tire. I just put new tires on the motorhome 2 years ago and have never added any since installed. Tires before that were 6 years old and never had air added after install. Can someone point me to a place where it states brand new tires leak air? I have seen a lot of folks checking the tires that seem to let a lot of air out trying to get the chuck straight on the valve.