Originally Posted by moosh

So we should just fill to the stated max PSI on the tires? Is anyone filling above the max PSI?

Originally Posted by ElanC

Yes, I've seen that site. It's an outfit that sells nitrogen filling devices, so not one I would trust much for an objective assessment. From what I've read elsewhere the main advantage of nitrogen is that the larger molecules permeate less through the tire wall, resulting in less pressure loss over time. Since most people don't check and correct their pressure often enough, nitrogen protects them from driving with under inflated tires. Basically it's an expensive way of keeping your tire pressure at the right level.

Moisture inside the tire can have large effect if there is enough of it to reach condensation. Then, as the tire heats up, the condensed water evaporates increasing tire pressure more than otherwise. This could be addressed by filling the tire with dry ordinary air. Nitrogen has no advantage.

Originally Posted by tigerhonaker

? So you members that have already taken delivery of your HCH ll, what is the (Max Pressure) on the "Sidewall" ?

Do all the 06 HCH ll come with the same manufactures tires on them?

Wayne; so what do think is a (Reasonable) Air-Pressure to run in the 06 HCH ll ?

Wayne; I did say (Reasonable) without a Overly Rough Ride and not to Prematurely Wear out the "Center-Of-The-Tires" from being over inflated.

Terry

Originally Posted by livvie

The only reason that racing teams use nitrogen to inflate the tires on their race car is predictability and not because the molecules are bigger... it's because when they inflate the tires to a certain PSI they can predict what the PSI will be when the tire is fully up to racing temp. This has nothing to do with the size of the molecules... It has all to do with the moisture in the tire... and eliminating all the moisture is what they accomplish by using nitrogen.

Our car tires will never reach racing tempuratures so the difference between the psi while cold versus hot should be about the same. So if you are worried about going over MAX... then switch.

Originally Posted by MGBGT

Just a note of caution:
as some have stated above, as long as you stay within the upper limit that is printed on the sidewall of the tire, you should be fine. But how does that really work? The pressure is typically cold pressure (someone correct me if I'm wrong), so what can push you over the limit if you inflate the tires to at-the-limit values? Changes in ambient temperature, and vehicle loading can. The closer you inflate your tires to the limit, the less marging of error you have. If you inflate to within a few psi of the limit, and do so on a cold day, with an empty vehicle, my guess is that if it warms up and you load up the car, you could find yourself easily over the limit.
Just food for thoughts...

Originally Posted by ElanC

It's funny that when I try to explain one thing, somebody assumes another.

I wasn't writing about race car drivers. I wrote about Mom and Pop drivers. The molecule size of nitrogen is the main advantage to them because it reduces leakage.