Cast one-piece annular rim member for a vehicle wheel

Process for the manufacture of an annular rim member to established radial dimensions for use in a vehicle wheel equipped with a pneumatic tire and, in particular, a tubeless tire, with the rim member forming a one-piece annular rim or an annular rim part including a wheel lip, supporting lugs or a support ring, comprising the steps of forming a mold cavity for the rim member with at least one of a radial overdimension and a radial underdimension of an amount other than the customary excess dimension provided for shrinkage or as a processing allowance, at least over an annular portion of the rim cross-section and with the outer surface of the rim member arranged to face the tire having an unitary annular area, pouring an iron-carbon melt into the mold cavity for forming the rim member with a ductile structure, removing the cast rim member from the mold cavity and radially plastic cold working the solidified cast rim member for plastically deforming the rim member during which plastic deformation the yield point of the cast ductile structure is exceeded and attain the established radial dimensions of the rim member for removing the at least one of a radial overdimension and a radial underdimension.