Nitrogen systems that many shops buy have the capability to flush out most of the air before the bead is sealed. They don't get every last bit of regular air out but the final result is a tire filled with 99% nitrogen.

Like I said, our trucks don't need this but it does reduce the need to top off the pressure so often and it does maintain more consistent pressure through temperature swings.

It also reduces the aging of the rubber as someone else mentioned.

That said, I have regular air in my tires.

 

I'll ask here as I did elsewhere- are you saying that you noticed a ride difference between ties with 78% nitrogen and tires with 99% nitrogen? 21% delta and this changes the ride?

If that's the case, fill the tires with free air (which is 78% N2) and over time, the O2 will leak out thus concentrating the remaining air to say, 80% N2, refill with standard air, repeat.... and eventually, the gas in the tire will be 90-95%! Voilà- free N2.

Sorry to harp- I just don't believe that anyone can feel a 21% change in N2 in their tires. Then again, I don't believe in throttle body spacers, that vinyl adds 10 HP or that dual exhaust as 15 HP on a 4 cyl engine, ...

 

The ride will not change with nitrogen fill (assuming the same warm pressure). But if you fill some tires with nitrogen and some with air and adjust them to the same cold pressure, yes, you will feel it because the tires with air in them will have a higher pressure once you drive a ways and they heat up.

 

Exactly. If the pressure is the same nobody can tell the difference in ride quality.

 

it could cause a ride difference, if there was alot of water in the air compresser, it could have put water in your tire causing an imbalance, and as some one said earlier there is much less water in the nitrogen if any at all... i have see a few ounce of water in a tire causing a huge vibration, because the guy filled hi tires with his air compressor and said he had never drained the water out....

 

Exactly, as the case with mine when I had a tire patched and air was put back in instead of nitro.

 

You must have a pretty sensitive *** if you can feel 1-2 PSI of pressure change! IMHO, the pressure change is in direct proportion to the tire expanding due to the same temperature, ergo, I (can't speak for you) will not be able to tell the diff,

Water causing an imbalance?? When a tire is rotating, so too are the contents. Centrifugal force will cause whatever water is inside to spin to the outer walls and will not affect balance as the water is spun equally around the inside.

If there is 1 ounce of H20 in a tire, there is a leak in the bead or valve or, a nail in the tire. It needs to be repaired ASAP.