An apparatus and method for mounting and inflating tires is described that is suitable for quickly sealing the beads of a tire to the rim of a wheel. The present invention delivers a high volume of pressurized air to an interior of a tire through a nozzle. The apparatus of the invention is particularly well suited for tire changing machines and tire mounting subsystems. The apparatus includes a tire changing station, an air supply controller, and a nozzle capable of delivering a high volume of pressurized fluid into an interior of a tire through a valve stem hole of the wheel rim.