What is the use of filling nitrogen gas in tyres instead of compressed air?
It’s basically a marketing ploy to get some extra money from you. There are benefits from using nitrogen but they are so slight it’s really not worth the money on a car tire. Aircraft use nitrogen in the tires to prevent moisture from freezing at high altitudes. Race cars use nitrogen filled tires to keep tire pressures more stable. The fact that nitrogen does have benefits in tires exposed to extreme temperatures and forces gave marketeers an opportunity to sell it to the public. Nitrogen molecules are larger than oxygen so in theory there will be less leakage over time, but plain air is 78% nitrogen so the benefit of replacing the other 22% is virtually nothing. If your tire and wheel have a good seal they will go for months without losing any pressure. If the seal is bad it will lose pressure with nitrogen as well. Air contains oxygen and moisture which degrades the rubber in a tire over time so filling the tires with nitrogen is supposed to prolong the life of tires. But the outsid