Bar drive wheel and adapter

In combination a wheel and adapter allowing the wheel to be fastened by means of a single knock-off type hub nut to a disk brake hub or brake drum of a vehicle utilizing wheels of the type that are attached by a plurality of lug bolts or lug nuts arranged in a circular pattern, said combination comprising;

• a. an adapter including
• (i) a circular base plate having through its thickness dimension a plurality of mounting holes adapted to register with lug bolt holes or studs of a disk brake hub or brake drum,
• (ii) an elongated hollow tube integral and coaxial with said base plate, said tube protruding perpendicularly outwards from said base plate and having therethrough a central coaxial bore extending through said base plate, said bore having an inner or rear opening of sufficient size to fit over the wheel bearing cap of said disk brake hub or brake drum, said tube having on the exterior surface of an outer axial portion thereof helical threads adapted to be threadingly engaged by internal threads provided in a cup-shaped hub nut,
• (iii) a plurality of engagement bars protruding axially outwards from said base plate and disposed radially outwards from said tube, said engagement bars adapted to be insertably received into registered grooves formed in the inner transverse wall surface of a wheel, and
• b. a wheel including a hub having a circularly symmetric body including a concave dish-shaped base section and a tubular front section of smaller diameter than said base section, said base section having a flat circular inner transverse wall provided with a plurality of axially inwardly cut grooves disposed radially outwards from said bore and adapted to insertably receive said engagement bars of said adapter.