Abstract: An adapter system for mounting dual wheel sets to a drive axle of a utility vehicle including an inside wheel having a specially configured web center piece which receives the original studs carried by the axle hub to be mounted thereto, and also mounts a set of auxiliary studs. An adapter extension member is mounted to the auxiliary studs and has a stud flange at the outboard end carrying a set of studs mounting the outer wheel thereto.

Abstract: A wheel adapter is provided which enables dual or tandem wheels to be attached to the hub of a vehicle axle which has been designed for a single wheel. The wheel adapter includes an elongated housing having an annular mounting flange at one end and a plurality of axially aligned, circumferentially spaced tubular members at its other end which register with the outwardly protruding studs from the wheel hub. A plurality of nut members threadably engage the studs on the wheel hub to secure one wheel rim to the hub. The other end of each nut member is cylindrical and extends into one of the tubular members while cooperating conical surfaces on the nut member and one end of the tubular members abut together. A bolt extends through the other end of each tubular member and threadably engages a bore in the cylindrical end of the nut member.

Abstract: An adapter is provided for attachment to the hub of a vehicle axle whereby after attachment of the adapter to the hub, a pair of coaxial wheels can be secured to the adapter. The adapter is of simple construction and comprises a tubular cylindrical housing having a first and second set of circumferentially spaced axial bores formed therethrough. The first set of axial bores register with studs protruding axially outwardly from the axial hub of the vehicle so that the housing can be positioned over and secured to the axle hub by the appropriate nuts. The second set of axial bores is provided through the housing so that one bore from this second set is positioned between each pair of axial bores from the first set. A bolt is positioned through each of the second set of axial bores so that the threaded ends of the bolts extend axially outwardly from the housing.