Abstract: A cart wheel structure having a pair of wheels rotatably mounted to opposite ends of an axle rod. The axle rod is mounted to a base portion of a cart by a pair of fabricated brackets having an upstanding swivel post adapted to be received in swivel cavities provided on the cart base portion. The swivel cavities are adapted to receive the swivel post of conventional swivel caster whereby the cart may be provided with caster and non-caster wheels as desired. The cooperation between the axle rod and brackets provides an accurate maintained disposition of the wheels carried on the opposite distal ends of the axle rod.