Does a nitrogen-filled tire keep its pressure longer?
A tire filled with 100% nitrogen loses its pressure more slowly than a tire filled with regular air. However, the difference is not very significant because atmospheric air already contains four times more nitrogen than oxygen. Nitrogen makes for a dry filling (no water vapour), which is positive with a view to corrosion as well as to temperature control. The pressure increase due to temperature fluctuations is the same for both filling materials. That means tires filled with nitrogen in cold condition don’t need a different pressure than tires filled with air. Basically, the use of nitrogen is not required for Vredestein passenger car tires. The quality and corrosion resistance of modern car tires and rims is fully adequate for regular air filling. Note: remember that tires with nitrogen filling must still be checked regularly for their correct pressure (see item 1). All kinds of conditions such as tire damage or not fully sealed valves may cause rapid loss of pressure from a nitrogen
