[kaishang]

"uniflate" is just nitrogen. It is a waste of money. Air is 79% nitrogen to start with, so paying a large amount of money to inflate your tyres with 100% nitrogen is totally pointless.

The remaining 21% of air which is not nitrogen is carbon dioxide, oxygen and water vapor. All of these, just like nitrogen can keep your tyre inflated.

The "better fuel consumption" in the weblink is misleading: it says that having correctly inflated tyres gives you better fuel consumption. They have provided zero evidence that filling your tyres with nitrogen gives you better fuel consumption and there is a reason they have provided zero evidence: because it doesn't do anything.

Now commercial airlines may use nitrogen in their tyres instead of air but that is because (a) using pure nitrogen reduces the already infinitesimally small risk that the air in the tyre could leak out, feeding a fire which was already in progress (b) this is the main reason: airplane tyres may operate in a 100 degreee temperature range from about -50C at altitude to +50 sitting on the tarmac plus they may have thousands of cycles of ground +50C/altitude -50C all happening within the space of an hour of each other. Dry nitrogen will not form ice crystals which any water vapor in air could, when the airplane is at 35,000 feeet and it is -50 outside.

None of the above paragraph applies to cars, so again, paying for pure nitrogen in your car tyres is a waste of money.