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How much does it cost to fill tires with nitrogen?

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What if Iíve checked the Nitrogen Dealer Locator and there isnít a dealer near me that offers nitrogen?

Can I put nitrogen in the tires I have now?

How much nitrogen should I put in my tires?

Do I fill my tires to the psi listed on my tires or on my vehicle?

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95% or 98% Nitrogen Purity- What’s Better For Me?

Whatís the best process for adding nitrogen to my tires?

Are tires covered under warranty by the manufacturer if they have nitrogen in them?

How does nitrogen affect my Tire Pressure Monitoring System?

Do I still need to check my tire pressure if I have nitrogen?

Will my tire pressure fluctuate while driving if I use nitrogen?

What are the effects of temperature change on my nitrogen filled tires?

Can I use nitrogen in the winter?

What if I'm driving in the mountains? What effect does altitude have on nitrogen?

Can nitrogen be used in motorcycle tires?

I already have 78% nitrogen in my tires. Why do I need more?

Why is nitrogen better than air?

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Where can I learn more about nitrogen inflation? Is there any scientific proof supporting it?

Is there any scientific support for the use of nitrogen in passenger and truck tires?

I check my tire pressure monthly. Will nitrogen provide any benefit to me?

Is nitrogen really a larger molecule than oxygen?


What are the effects of temperature change on my nitrogen filled tires?

The pressure in nitrogen filled tires will change when the temperature changes, just as it does with air filled tires, because nitrogen and oxygen respond to changes in ambient temperature in a similar manner. For example, when your vehicle is parked it will lose a similar amount of pressure for every 10 degree change in temperature, whether the tires are filled with nitrogen or air.

The calculations for this change are based on the Ideal Gas Law. A good rule of thumb is this: For every 10 F degree change in temperature, the pressure will change by 1.9%. If a tire is filled to 32 psi at a temperature of 75 F degrees and the temperature drops 10 degrees, the tire pressure will drop to 31.4 psi; a difference of .6 psi. If a 100 psi tire is filled at 75 F degrees and the temperature drops 10 degrees, the tire pressure will drop to 98.1 psi; a difference of .9 psi.

These fluctuations will occur as the temperature rises and falls no matter what the inflation gas. Fortunately, tire manufacturers are well aware of these conditions and design their tires and recommend their cold inflation pressure accordingly.

However, nitrogen does not contain the moisture and other contaminants found in compressed air so, as you drive and the tires heat up, nitrogen filled tires will fluctuate less in temperature and pressure than air filled tires while driving. The bottom line is, you will still see pressure changes with nitrogen but, overall, your tires will run cooler and at a more consistent pressure than if they were filled with air.

For more information please see the Effects of Temperature on Pressure which shows the expansion rates of dry air or nitrogen, in both a truck and passenger tire, as the temperature increases. It also shows how the vapor pressure of water increases as temperature increases and includes a brief explanation.

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