Quote:
Originally Posted by Navy Horn 16
When tires are mounted and on a vehicle they are filled with pressurized oxygen and then subject to countless heat cycles (from sun, and road heat). If you want to speed up diffusion of molecules, add pressure and heat. That's how it works with your tires, and that is why the fancy import places use nitrogen in their tires.
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So much for that discussion because the 6 YO tires I have on the 99 GP are nitrogen filled, and they're degrading too, as I've already described. I doubt they'd last another year. I'm not buying the degradation is slowed by nitrogen, or sitting in a warehouse so much that it's going to add 4 years more to the tire life. It may be retarded a small bit by not being mounted, not 4 years worth.
The tire companies just want to sell their NOS off, Just like most humans can't see how something brand new can go bad, no matter how long it sits. Ozone is present no matter where a tire sits, it also degrades rubber parts so I still go from MFG date, regardless of how long it sat in a warehouse unmounted.