Abstract: An insert for a pneumatic tire including an annular member adapted to contact at least 10% of an interior surface of the pneumatic tire and provide an outward pressure thereagainst.

Abstract: An annular and ring extends around the interior of a wheel/rim on which a tire is mounted. The inner diameter of the annular ring is sized for a snug fit on the wheel rim. A tensioning cable extends through the tubular ring and opposed arms are attached to the ring and are movable between disengaged and engaged positions. The apparatus is selectively movable by actuation of a cable tensioner between a first, disengaged position where the arms do not engage the tire and thereby lock it to the rim, and a second, engaged position in which the arm bear against the tire beads, capturing the tire beads between the rim flanges and the wing members to lock the tire to the rim and to create and/or enhances the air-tight seal between the tire and the rim. The bead lock apparatus may be beneficially used in combination with a foam insert for enhanced tire performance.