The present disclosure provides a nitrogen tire inflation and deflation system and associated usage methods. In one exemplary embodiment, the system includes a dispenser and a nitrogen storage device along with an associated usage method. In another exemplary embodiment of the present disclosure, a decommissioned pay phone is converted into an air or nitrogen dispenser. The conversion utilizes the form-factor and payment component of the pay phone with the additional of parts to regulate air flow. Advantageously, this provides an environmental solution to waste disposal of decommissioned pay phones. The air/nitrogen dispenser of the present disclosure can be placed at gasoline stations, convenience stores, car washes, and the like.