Abstract: A wheel assembly for an overhead conveyor system is disclosed. The wheel assembly includes a self-lubricating thermoplastic wheel having a central opening with a conical section therein. An internally threaded axle member having a conical head is inserted into the central opening of the wheel, generally mating with the conical section of the central opening. An ordinary bolt is then utilized to secure a suspension member to the wheel and axle member combination. In a preferred embodiment of the present invention, The conical head of the axle member includes a slot adapted to receive a screwdriver head in order that a wheel may be removed and replaced without the necessity of disassembling the conveyor system. In conveyor systems utilizing an I-beam suspension, a pair of wheel assemblies may disposed in opposite positions to support a single suspension member.