Sure. There is no logical reason not to mix it. Regular air is mostly nitrogen anyways.
Mixing nitrogen and regular air in tires will dilute the benefits of having pure nitrogen-filled tires, such as more stable tire pressure and reduced oxidation of the tire components. It may still provide some benefits over using regular air alone, but the advantages won't be as pronounced.
Air is 78% nitrogen, and most tyres are inflated with air, so mixing pure nitrogen with air would not be a problem.
If you are using a regular pump that draws its air from the surrounding atmosphere, then yes you will be pumping oxygen(as well as a mix of other gases) into the tire. Oxygen is corrosive and flammable, and pumping pure O2 into your tires is a terrible idea. Plain air is about 75% nitrogen, which is fairly inert, and this is the preferred gas for pumping tires, as it is also the cheapest.
If you have a nitrogen filled tire that is low you can put in regular compressed air to fill it up, but you will lose some of the benefit of the nitrogen. You should replace the green cap with a black one if you have filled the tire with regular air. 90% of cars on the road are just using regular compressed air, and not having a lot of problems. So I wouldn't worry too much about it.
The two will mix.
Short Answer...yes. Nitrogen doesnt expand with heat. Air does. They are mixable, but it's best to just stick with one or the other. The air in the atmosphere is approx 78% nitrogen anyway. All gases behave the same according to the gas laws. If nitrogen did not expand with heat how could a hot air balloon get off the ground? The benefits of filling tires with nitrogen are, 1 the air has had all the moisture removed ( no rim corrosion) 2 Nitrogen doesn't expand as much when heated (less pressure variance due to temp) 3 Nitrogen is a larger molecule so it doesn't leak as easily.
air
nitrous oxide? <><><><> Air you are breathing right this second is a mix of nitrogen (79%) and oxygen (21%)
78% of the air we breathe is nitrogen. 21% is oxygen, and the other 1% is a mix of other gasses.
78% of the air we breathe is nitrogen. 21% is oxygen, and the other 1% is a mix of other gasses.
Short Answer...yes. Nitrogen doesnt expand with heat. Air does. They are mixable, but it's best to just stick with one or the other. The air in the atmosphere is approx 78% nitrogen anyway. All gases behave the same according to the gas laws. If nitrogen did not expand with heat how could a hot air balloon get off the ground? The benefits of filling tires with nitrogen are, 1 the air has had all the moisture removed ( no rim corrosion) 2 Nitrogen doesn't expand as much when heated (less pressure variance due to temp) 3 Nitrogen is a larger molecule so it doesn't leak as easily.
Charlie sheen