Re: Adding nitrogen to tires
- From: "George E. Cawthon" <GeorgeC-Boise@xxxxxxxxxxxxxxxx>
- Date: Tue, 25 Oct 2005 23:16:38 GMT
bill horne wrote:
George E. Cawthon wrote:
OTOH, I don't believe either nitrogen or oxygen diffuse out of the tire very fast. My winter tires, just put on, are within 2 psi of what they were when I took them off 6 months ago, and my summer tires were within 2 psi when I put them on in the spring as when I took them off last fall. Course, part of the change could be a difference in the temperature. In any case, gas doesn't diffuse out of my tires very fast when the initial pressure is 34 or 35 psi. And when you get a large change it is usually the result of leaks.
Everything I've read for decades indicates 1-2 lbs per month - and that's generally been my experience.
That number you read is probably an average that considers all types of conditions. My experience is quite different from what you stated.
Guess I just have superior tires or tires with no leaks, or a fairy godmother that comes around and keeps the tires full. On my small auto, my tires go into storage at 33.5-34 psi. They go back on the auto 6 months later. Most of the time they read 32-33 psi directly from storage. They are never down 6 psi, (26-28 psi). I would be very worried if they were down 12 psi, i.e, 20-22 psi. The only time I have ever found a tire down 12 psi is when it has a nail in it.
I just put my winter tires on last week. Three tires read 32.5 psi and one read 33.5 psi.
My trailer usually sits from November to April (5 months). I run the trailer tires at 34 psi and they usually read not less than 31, but more like 32-33 psi in the spring.
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