A tire assembly is disclosed, wherein the tire has a tread portion and a pair of sidewalls extending radially inward from the tread portion to join with a respective bead; a supporting carcass for the tread portion and sidewalls; and a pump passageway positioned within a bending region of the tire. The pump passageway is operative to open and close as the tire rotates. The tire assembly further includes a valve assembly in fluid communication with the pump passageway. The tire further includes a filter assembly mounted in the tire. The filter assembly is formed of a housing having an interior cavity for receiving the filter media, the interior cavity having an inlet in fluid communication with the outside air and an outlet in fluid communication with the inlet port of the valve assembly. The housing further includes a second cavity, wherein the second cavity is in fluid communication with the pump inlet and the valve assembly outlet.