ARI-HETRA's Nitrofill replaces air with non-corrosive, non-combustible and non-oxidizing nitrogen. By using nitrogen instead of air, you are able to maintain a more stable tire pressure, which results in savings on fuel costs. Due to the non-corrosive nature of nitrogen less rim corrosion will occur, tire aging is reduced thereby giving you longer lasting tires as well as tires that can be re-treaded again and again.