Why Nitrogen?
Safer, smother ride
With under-inflated tires, there is less contact area between the tire and the road surface. This leads to less braking and steering control and a greater potential for blowouts. Properly inflated tires give drivers the control they need for a safer, smoother ride.
Better gas mileage
By maintaining proper tire pressure with high-purity Nitrogen Inflation, tire rolling resistance is reduced, helping to maximize vehicle fuel efficiency. With today’ high price of gasoline, this can be a major advantage to you.
Longer tire life
Under-inflated tires wear prematurely due to uneven road contact. Maintaining proper inflation longer can help increase tire life. High-purity nitrogen-filled tires retain proper pressure longer, so they won't wear as quickly. Plus, replacing damp compressed air in tires with dry, inert, nitrogen can help to eliminate internal tire degradation and prevent rusting of the rim.
Convenience
With high-purity nitrogen tire inflation, you won't need to refill their tires as frequently
Oxidation
Air is about 1/5 Oxygen, and oxygen, especially at high pressures and temperatures, is a very reactive element.
When oxygen reacts with things, the process is called oxidation. When oxidation is extremely rapid, it's called "burningâ€.
That's one reason nitrogen is used in off-highway and aircraft tires. These tires runs on oxygen get so hot, they can actually catch on fire. Nitrogen doesn't support combustion, so nitrogen-filled tires don't add fuel to the flames. And nitrogen helps prevent slower forms of oxidation also.
Nitrogen prevents corrosion of tires.
Oxygen and moisture corrodes aluminum and steel wheels. Oxygen also reacts with rubber, another type of "corrosion". When this corrosion starts, the small particles break off and form rust and dust, which can clog valve cores, causing them to leak. The rough surfaces created from the corrosive action on the wheels leads to tire beads that don't seal properly, causing additional leaks.
It's not about the nitrogen. It's about reducing oxygen, water vapor and other gases.
By reducing the percentage of oxygen, water vapor and other gases in your tires from 22% to 7% or lower, your tires will maintain proper pressure longer than if you use “plain old air.†For example, with 95% nitrogen in your tires, they retain optimal pressure three to four times longer.
Longer Rim Life
Rim rust caused by condensation from water vapor and other gases can get caught in valves and create slow leak in tires. Nitrogen is completely dry, so it eliminates the potential for condensation.
It's better for your tires and safer too 
me too.
