Abstract: The invention concerns a unitary wheel system for road vehicles, especially cars, in order to minimize the manufacturing costs and the expenses for piling up reserves concerning such wheels the proposed wheel system is based on a single wheel provided with less additional elements to adapt this wheel to practically each car requesting wheels having a hole circuit diameter between 98 and 120 mm independently from the fact whether the attachment of the wheel to the axle hub of the vehicle should be made by means of four or five holes and a corresponding number of screws and further independently from the fact whether or not the wheel or its rim, respectively, is to be attached by wheel screws or by a central closing nut.