WHEEL HUB ASSEMBLY

A wheel hub assembly for a non-drive axle of a vehicle, the wheel hub assembly comprising a wheel flange for rotatably supporting a tire with respect to a vehicle chassis; a spindle for supporting the wheel flange with respect to the chassis; and an air flow path for supplying pressurised air from an air supply to said tire. The spindle is rotatable with the wheel flange with respect to the chassis; and a section of the air flow path is defined by the spindle.