Nitrogen in tires is becoming a very popular replacement for air, and for good reason. With proper inflation procedures and adequate purity nitrogen can provide amazing benefits. Converting to nitrogen in tires can improve your fuel economy by up to 5% and increase your tire life by 10% or more while dramatically increasing the safety of your vehicle. Nitrogen has been used for decades in Nascar, Formula One, the Tour de France, the US Military and many other applications where safety and economy are paramount concerns.