Filling your tires with nitrogen is totally passe. Everyone knows all the cool kids now use argon. Imagine the embarrassment of being seen flying in an aircraft that had tires filled with a low molar mass inert gas like nitrogen? Aircraft tire inflation gas diffusion losses are totally lame.
I've even heard recent rumors of a couple more progressive members of the underground aircraft tire culture experimenting with using xenon and krypton gas for inflation. What makes it especially cool is that they produce their own gas supply by distilling the earth's air, so it's totally carbon neutral and socially responsible!
