An air pressure regulation system and method are provided. The system includes a pressure regulation system configured to be mounted within an axle of a moving vehicle having a tire mounted thereto. The pressure regulation system includes a pump assembly configured to continuously pump a gas into the tire. A release valve is configured to enable gas above a set pressure to pass from the tire through a second pneumatic fitting into the atmosphere. The release valve selectively closes after the air pressure within the tire no longer exceeds the predetermined level.