You can try a Firestone, Just Tires, or one of those places. Nitrogen is much more stable than air, as it is much less affected by temp change. Is it worth the extra $$$$$ to pump into our tires? Many experts say no. Our vehicles do not go through the stresses as Nascar, and other race vehicles where nitrogen really benefits the handling of those cars. Personally, I wouldn't waste the $$$$$$.