I hate cars

And I'm a little disappointed. I keep close tabs on the inflation and I get a 5 psi pressure rise going from the driveway to the freeway for a few minutes. I stopped by a local tire shop and decided to have the tires drained and refilled with nitrogen. I don't know if they didn't drain all the air out or if their nitrogen was not pure but I still get a 2-3psi difference. I guess I can't really complain about 2psi though. On a sidenote, I had them put 40psi in and I was going to let the pressure out to the usual 34 myself but the tires are actually quieter at 40 so I might leave them there.

avs007

That's because all gases follow the rule that pv = nRT. (Pressure times volume = universal constant times amount of gas times temperature.

Doesn't matter if the tire is filled with oxygen, nitrogen, helium, neon, etc.

All the claims that nitrogen will cause your tires to not expand as much with temperature, is based on the fact that the membrane used to get the nitrogen, filters out moisture too. That moisture causes a big change in pressure with temperature, because of the phase shift from liquid to gas, as it vaporizes with temperature.

If you have your own air-compressor, install a line-dryer, and you'll get the same results with regular air, that is free of moisture.

01tl4tl

Overinflated tires wear funny and handle worse= run the recommended pressure plus a few

I hate cars

It will be ok on these tires. They're 255s so they need a couple extra psi to get the proper footprint. I guess it was still worth it since I paid nearly $200 a piece for the tires and the nitrogen was only $16 total.