1. Car tires can be filled with nitrogen or air. We have no special suggestions or requirements in this regard. In fact, most of the components in the air are nitrogen.

We recommend that the air filled into the tires should be dried air (if the moisture content in the air is too large, the tire pressure will be more affected by the outside temperature). Nitrogen and dry air have the same effect for ordinary car tires.

2. It can be mixed.

3. The air can be flushed while filling with nitrogen.

4. Nitrogen is used as an inert gas in some special use environments (for example: some aircraft tires and engineering machinery tires) to reduce the generation of oxygen in the air due to sparks and the air inside the tire after the tire is broken Danger. But as ordinary car tires, there are no special requirements in this regard.