Nitrogen In Tires...good Or Bad?

[jpham8]

The last time I went to have my tires re-placed, they talked me into having my tires filled with nitrogen is this good or bad...they essentially told me that the life of the tire will last longer. Is this true?

[dcrusupra]

I had it in my tires. I didn't notice a difference. Air is 70% nitrogen anyway. It does however keep the tires cooler. I got it for free so it was worth a try.

[dgl94456]

nitrogen in tires is GOOD because nitrogen is an inert gas and therefore will not react in any way with tire material. And, because it is inert, it does not expand and contract with temperature or atmospheric pressure changes, which is why aircraft tires are inflated with nitrogen vice air.Air is 79% oxygen which is a VERY active/reactive gas.

[mrnickleye]

Originally Posted by dgl94456

nitrogen in tires is GOOD because nitrogen is an inert gas and therefore will not react in any way with tire material. And, because it is inert, it does not expand and contract with temperature or atmospheric pressure changes, which is why aircraft tires are inflated with nitrogen vice air. Air is 79% oxygen which is a VERY active/reactive gas.

Sorry Mate, but definately not true. In TRUTH, it approx 21% oxygen in the atmosphere. 78% nitrogen.

http://en.wikibooks.org/wiki/Meteoro...the_Atmosphere

And Remember...GOOGLE IS YOUR FRIEND.

BUT...you are correct about nitrogen in tires.

http://ezinearticles.com/?Selling-Ni...-Air?&id=38142

[4ageBT]

Nitrogen is good for the tires. It makes your tire pressure constant no matter the road temparature. It keeps your tires in good shape because of the prevention of too much pressure.

[finaltable]

Originally Posted by 4ageBT

It makes your tire pressure constant no matter the road temparature.

Nope. All gases, regardless of molecular composition, behave according to pv=nrt (pressure*volume=number of moles * constant * temperature.) It is IMPOSSIBLE to have constant pressure under rising temperature without changing one of the other factors at the same time. Since the inside of a tire is a roughly constant volume, unless you are planning on leaking gas when the temp goes up the pressure WILL increase.

[mrnickleye]

Googling around brought these sites up. Check them out.

http://www.parker.com/ead/cm2.asp?cmid=9087

http://www.parker.com/ead/cm2.asp?cmid=9093&

The tires run cooler with pure nitrogen. While an air filled tire's pressure will increase 5*-10* when hot, a nitrogen filled tire will increase 1*-5*.

http://www.parker.com/balston/English/coolrunning.pdf
[quote]
"Sheehy and his technicians service their trucks as they come in off the road, and they’ve been checking tire pressures consistently as part of their nitrogen test. According to Sheehy, every truck leaves home base with their drive tires inflated to 85 pounds. “If you check the tire pressures right off the road, a normally aired up tire will come in at between 90-95 pounds consistently when they’re hot. The nitrogen comes in between 85 and 90 pounds. It’s more stable, which means they’re running cooler".

But for me...since 80% of my driving is short trips around town, I use regular air, and I tend to wear the tread out quicker than the rest of the tire...and I do check and top up my air pressure (36psi) regularly.

[ultimatewarrior8888]

Good writing. Keep up the good work.I love this site, let's try our best together, seize everyday, just do it!Runescapemoney.

[crg1990]

Actually according to the ideal gas law, Pv=nRT, as volume is staying the same and temperature is increasing, pressure will also increase. Nitrogen does not increase in pressure as much as oxygen because it has a higher specific heat and requires more heat energy to increase in temperature.

[pandrade]

from what i know nitrogen doesent seep throught the ruber as fast as natural compressed air, besides that its just easier to mesure becaus it isent as afected by temp changes as natural air. if you cant get it free dont wast ur money, i get for free from costco so for me its like why not