• Maintains constant inflation pressure. Tires inflated with normal air typically lose about a pound of air pressure a month
• Improves your gas milage due to consistent tire inflation
• Prolongs your tire life
• Preserves steel belt strength
• Maintains tire flexibility
• Reduces wheel oxidation problems
• Improves ride comfort

Major manufacturers like Michelin, BF Goodrich and Uniroyal recommend using nitrogen based on its ability to better retain pressure over time.