Wheel sub-assembly for a very large vehicle and manufacturing method thereof

A method of manufacturing a wheel sub-assembly for a wheel of a very large vehicle, such as those used for mobile cranes, quarry excavation or transport of mined material. The method includes providing first and second cylindrical blank components and an annular disc blank; press forming the first blank component to form a one piece, axially outer rim portion; press forming the second blank component to form a one piece, axially inner rim portion; circumferentially Joining, the outer and inner rim portions to form an annular wheel rim having a base; machining the inside diameter of the wheel rim base; press forming the disc blank to form a press-formed disc; machining the outside edge of the press-formed disc; press fitting the press-formed disc to the wheel rim base at the machined inside diameter; and welding the press-formed disc to the wheel rim base at the machined inside diameter.