Nitrogen In Tires?

[r0tor]

i believe an answer to the question is if you look at the mass of stuff filling the tire at 0 psi, its going to be pretty irrelevant to the mass of the stuff filling the tire at 30-40 psi.

[etypeJohn]

Unless you suck it out with a very powerful vacuum pump, there is still air in the tire.

Which is likely to suck the beads of the tire off of the wheel rim.

[heelntoe]

Tube?

yes sir. it's pretty hard to find 10" tubeless tyres.

[Morris Minor]

(a 78% nitrogen mix)

Wrong.  It's actually 78.084%

[etypeJohn]

Wrong.? It's actually 78.084%

Only in the red states.

[Raza]

How does that do for you?  I knew a guy who used squirrel puree when I was in college.

It works very well, but it's a mess if you have a blowout.

[S204STi]

Just fill them with foam and be done with it.

[Morris Minor]

Fill them with sequestered C02: a great way of enjoying all the benefits of a gas-guzzlin' SUV, and saving the planet too.

[Soup DeVille]

i believe an answer to the question is if you look at the mass of stuff filling the tire at 0 psi, its going to be pretty irrelevant to the mass of the stuff filling the tire at 30-40 psi.

Think in terms of actual pressure, not ambient.

A "flat tire" will still have 14.7 PSI (or there-abouts) in it absolute.

A "30 PSI" tire will have 44.7 PSI absolute.

So, the pure nitrogen tire is actually still 1/3 air.

[BimmerM3]

Think in terms of actual pressure, not ambient.

A "flat tire" will still have 14.7 PSI (or there-abouts) in it absolute.

A "30 PSI" tire will have 44.7 PSI absolute.

So, the pure nitrogen tire is actually still 1/3 air.

Which is ~78% nitrogen, mixed with 2/3 95% Nitrogen, and you get an overall nitrogen percentage of 89.333 etc.

[Soup DeVille]

Which is ~78% nitrogen, mixed with 2/3 95% Nitrogen, and you get an overall nitrogen percentage of 89.333 etc.

Thanks for crunching the numbers for me; I was too lazy to.

[r0tor]

getting back to my original point, i believe if you use the ideal gas laws, figure out the mass of the air occupying the tire at 0 psig (14.7 actual) and then at 30psig, you'll get something like 7 percent of the tire not being nitrogen....

[Soup DeVille]

getting back to my original point, i believe if you use the ideal gas laws, figure out the mass of the air occupying the tire at 0 psig (14.7 actual) and then at 30psig, you'll get something like 7 percent of the tire not being nitrogen....

Somebody stated earlier that the 'pure' nitrogen is only 95% pure.