Cigroller and Doubleclutch have it right. Nitrogen in the tires means no savings to you. I race the 1/4 mile in 10:43 and use Nitrogen for that car. The tires don’t expand with the nitrogen which means I can run more races on those tires. But my street vehicle run air in the tires. Check-them-tires weekly for pressure, daily on looks, rotate them as you should and the tires will last a good long time. I run Low-Pros on my street vehicle and the last 4-5 years. Because I take care of them.