Do they fill airplane tires with nitrogen?

Aircraft tires are filled with nitrogen because nitrogen gas is mostly inert, meaning that it requires more energy to react with other substances. This is important because at elevated temperatures, oxygen can react with rubber. read more

Apart from the reasons in Rob DeCosta's excellent answer, the question itself is a bit misleading. Nitrogen is used as a standard in cars and motorcycles at many pumps too. read more

Filling tires with nitrogen involves filling and purging several times in succession, serially diluting the concentration of oxygen in the tire. This will also remove any water. It's certainly simple, although time-consuming, for a tire technician to fill and bleed tires. read more

The results showed that nitrogen did reduce pressure loss over time, but it was only a 1.3 psi difference from air-filled tires. Among 31 pairs of tires, the average loss of air-filled tires was 3.5 psi from the initial 30 psi setting. read more