My camper came with tires filled with Nitro air

westend wrote:

Johno02 wrote:
OK, I would like to find out more actual facts about this, and I am absolutely NOT an expert, or even very knowledgable about tires or what s in them. However, when we went in to get the Nitrogen in our tires topped off, the pressure in all four had dropped from a normal 32 lbs. down to 24 lbs all around. So I was reasonably sure that I did not have a leak or anything wrong. At the tire dealer, the tire person said that it was probably due to the minor temperature change, which had dropped from the 90+ down into the 70+ range. Not a big overall change at all. He said that they had a good number of folks coming by for a topoff in the last week. I hadno reason to doubt what he said and it seemed reasonable, so we just thanked him, and went on out way. These tires have been on this car for over a year, and the original pressure was about 33 lbs in all four tires. I have not noticed any change more than 2-3 lbs so far, checking both at rest cold, at rest hot, and while driving at speeds up to 70mph. Does anyone have any actual facts, or other experience??

All tires and rims will lose air pressure while in use, nitrogen filled less so. Losing 8 lbs all around could be typical with a temperature drop and a year's duration of use.

If you don't want to be startled by an air pressure drop, my suggestion would be to check your tire pressures more frequently and add air when needed.

They all stayed the same pressure but 25% swing seems awfully big. I have never lost more than 5-8% max and that is with regular air.