Thermoguy wrote:Once a year. In the spring when the temps are cooler here in Phoenix. As the temps go up into the summer, the pressure rise that goes along with the temp rise offsets the natural pressure loss that ALL tires experience.Huntindog wrote:
An often mentioned benefit is that nitrogen molocules are larger than oxygen.... So it does not leak thru the pores of the tire as fast.... probably true but..... Regular air is about 68% nitrogen, so according to this theory every time air is added to the tire the nitrogen % should increase.... IOW, even those that do not initailly have their tires filled with nitrogen soon end up with close to the same percntage as those that do! In short; their is very little benefit to having this done. Especially if one takes into account that the nitrogen filled tires are never 100% filled with nitrogen! That would require suctioning out all of the air before adding the nitrogen.... Which is impossible.
Just Curious - how often are you adding air to your tires? I can go years and never add air. If you are adding air regularly, you might have a different issue you should look into.
Thermoguy wrote:
also had one that had a constant leak no one could fix. Now, new tires from Costco - different tire but filled with nitrogen at no cost.
Huntindog wrote:dodge guy wrote:I think that bead lock rims would be required to keep the bead from unseating when suctioning.wanderingbob wrote:
Think about it , it would be near impossible to purge a tire on a rim , could not be done even with a vacumn pump .So your empty tire is sitting there 100 per cent full of air , then they add a little nitrogen to bring it up to pressure . And then charge you or not !
Actually at the least shop I worked at we had a Nitrogen machine for filling tires. You filled them with regular air to seat the bead. Then used the machines vacuum function to suck all the air out. It would collapse the tire. Then you filled it with pure Nitrogen. Done properly it works. But for everyday use it’s unnecessary.
There may be some tires with very stout construction where it might work..... As for collapsing the tire.... That probably isn't good for it.
Now if you were to use nitrogen to seat the bead, and then let most of it escape, then refill it with nitrogen.... That may get it close to 100%
philh wrote:Thermoguy wrote:
Actually I think Nitrogen is a benefit. n.
Nitrogen doesn't expand and contract as much as typical air from a compressor due to moisture, so, when your tires get hot, the Nitrogen tire does not expand as much, or have as much of a pressure change.
Horsepucky.
Automotive tires don't get hot enough for moisture to have any impact tire pressure.
You'd have to get the AIR temperature inside the tire above 212F before moisture has an impact. At 212F, you're in deep doodoo already.
Huntindog wrote:
An often mentioned benefit is that nitrogen molocules are larger than oxygen.... So it does not leak thru the pores of the tire as fast.... probably true but..... Regular air is about 68% nitrogen, so according to this theory every time air is added to the tire the nitrogen % should increase.... IOW, even those that do not initailly have their tires filled with nitrogen soon end up with close to the same percntage as those that do! In short; their is very little benefit to having this done. Especially if one takes into account that the nitrogen filled tires are never 100% filled with nitrogen! That would require suctioning out all of the air before adding the nitrogen.... Which is impossible.
Thermoguy wrote:I love it; "I didn't watch the whole video, but...":S No, the points that matter are the scientific differences between 100% nitrogen and air (which is already 78% nitrogen). If it's free, fine, but there are NO measurable benefits.4x4van wrote:
Everything you never wanted to know about nitrogen in tires.
OK - I didn't watch this entire video here - but the only point that matters is that he is talking about paying for Nitrogen. I have had it in 3 vehicles and have never paid for Nitrogen. The first time I used it they were going to charge me 5$ for all 4 tires, but after doing it, they didn't charge me. I had him do 2 cars. So, if it is free, why not. There are some benefits.
dodge guy wrote:I think that bead lock rims would be required to keep the bead from unseating when suctioning.wanderingbob wrote:
Think about it , it would be near impossible to purge a tire on a rim , could not be done even with a vacumn pump .So your empty tire is sitting there 100 per cent full of air , then they add a little nitrogen to bring it up to pressure . And then charge you or not !
Actually at the least shop I worked at we had a Nitrogen machine for filling tires. You filled them with regular air to seat the bead. Then used the machines vacuum function to suck all the air out. It would collapse the tire. Then you filled it with pure Nitrogen. Done properly it works. But for everyday use it’s unnecessary.
