Just transfer the air in your tires over to Nitrogen and you will reduce the pressure change that takes place, either daily or even by season. It also help keep tire pressure more accurate, you will only loose a pound or two every four to five months. Additionally, if you have TPMS, it will help extend they live of the expensive sensors. You can read more about it at… Premier Nitrogen . com . It is our site for selling machines, but you can read all the tech to better understand the reason for doing it. Hope this helps… Gary