An inner tire used in a dual-chambered tire is provided by an inner tire in which an exterior sidewall of tire provides for two annular rows of overlapping raised facets that extend above the exterior surface of the tire. Each facet defines a right angle with respect to the adjacent sidewall of the tire and provides for an elevated surface having a substantially uniform height with respect to the underlying tire exterior surface. The facets further define a plurality of gaps and passageways that have a constant height and through which pressurized air may flow during the inflation of the outer tire. The air gaps and air passageways defined by the facets have a sufficient depth that the resulting passageways do not collapse when the pressurized inner tire is in engagement with the pressurized outer tire.