Abstract: A tab bearing is provided that includes a body having a first outside edge, a second outside edge, an inner surface, and an outer surface. At least one tab projects outwardly from the outer surface at the first outside edge. The tab may only extend partially around the first outside edge such that less than half of the first outside edge is traversed by the tab.

Abstract: A vent system for a wheel hub comprising a first filtered vent at the wheel end cavity and a second vent formed by a one-way, pressure relief valve venting the axle tube to atmosphere. The vent system defines a vent path from the wheel end cavity through a first, preferably filtered, vent into the axle tube then through a second check valve connecting the axle tube to atmosphere. A porous material is positioned to cover the vent passage at the wheel end cavity for allowing a flow of gases to enter and exit the vent passage while preventing liquids and other contaminants from traveling therethrough. The porous material is held in place over the vent by a snap ring or other suitable retention system disposed within the vented plug member.