Nitrogen in tires, where to fill up?

4r3s

mainly nitrogen is less susceptible to pressure changes when the air temperature changes. So basically your tpms will be more accurate.

"So, to answer your specific questions: With nitrogen, your tire pressures will remain more constant, saving you a small amount in fuel and tire-maintenance costs. There will be less moisture inside your tires, meaning less corrosion on your wheels. You will not be able to feel any difference in the ride or handling or braking, unless your tire pressures were seriously out of spec and changing to nitrogen brought them back to the proper numbers."

Source:
Nitrogen vs Air In Tires - Why Nitrogen in Tires - Popular Mechanics

Now, do I only put pure nitrogen in my tires? Nope!