ARI-HETRA announces its newest Wheel Service product, the Nitrofill Nitrogen Tire Inflation System. Nitrogen tire inflation is a much safer and economical alternative to air. 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.