A buddy of mine has a shop and just started using nitrogen. We filled all my vehicles tires. Costco now sells nitrogen. $3 a tire. Benefits are said to be Why Inflate with Nitrogen? Oxygen is your tire’s worst enemy. Air is about 78% nitrogen, 21% oxygen, and 1% other. Nitrogen is inert, non combustible, and non corrosive. Oxygen on the other hand is a destructive element. When tires are exposed to air, a long term and continuing deterioration begins - the oxidation of the rubber in the tire. What happens to a rubber band over time? It loses its elasticity and strength. This same process occurs in tires inflated with air as the oxygen attacks the rubber molecules, working from the inside out until the oxygen permeates the tire structure and ultimately the tread. Is All Nitrogen Gas Equal? No, nitrogen is available from nitrogen generators in different purities, generally ranging from 95% (low purity) to 99.9% (high purity). What Purity of Nitrogen Should I Use? All of our aging and longevity tests were with 98% or better. We strongly recommend that 98% or better be used to inflate your tires. What Are the Other Benefits of Nitrogen Inflation? Tires Last Longer On the road tests show that tires inflated with nitrogen lasted 25-30% longer and that road failures were reduced by 50%. Tires Hold Their Pressure Longer Nitrogen diffuses thru the walls of the tire 25-30% slower than air, significantly reducing tire pressure loss between inflation checks. Under inflated tires wear faster. A tire that is 10% underinflated will lose approximately 7% of its service life. Fewer Tire Failures The strength of tires are affected by oxidation, heat and pressure. Tires are weakened by the oxidation process, this process is accelerated by the heat generated from rolling. This oxidation is refered to as "fatigue" and "aging". Nitrogen filled tires had twice the life to failure in both field and laboratory tests. Better Fuel Mileage and Handling Tires that are properly inflated roll better than underinflated tires and get better fuel mileage. Tires that are properly inflated also respond better to steering input and handle better. Rims and Wheels Resist Rust Nitrogen produced by our systems is completely dry and without moisture rims and wheels are less likely to rust. Stronger Casings Mean More Retreads The lack of oxidation means that the tire casings remain stronger and can be retreaded additional times for longer tire life.