A wheel disc for a disc wheel, especially for utility vehicles; with an essentially radially extending hub fitting flange and an essentially cylindrical disc edge which can be joined to a wheel rim, and with a transition region extending between the hub fitting flange and the disc edge, wherein the transition region is subdivided into at least five segments (Ai to v) passing into each other or into the hub fitting flange or the disc edge, each of which has an outer end situated closer to the hub fitting flange and an inner end situated closer to the disc edge, wherein neighbouring segments have curvatures with different directions and variable material thickness, with the ratios of the material thicknesses and the ratio of their lengths to heights are chosen as follows: Material thickness ofLength in axial inner enddirection Material thickness ofHeight in radial outer enddirection Segment AI0.45-0.7 0.9-1.1 (between hub fitting flange and segment AII) Segment AII0.7-1.0 1.6-1.9 (between AI and AIII) Segment AIII0.9-1.252.5-2.8 (between AII and AIV) Segment AIV0.9-1.252.8-3.1 (between AIII and AV) Segment AV0.7-1.156.0-6.8 (between AIV and disc edge)