A wheel disc adapted for use in a fabricated vehicle wheel comprising: a steel wheel disc defining an axis (X1) and including a center mounting portion , an outer rim connecting flange , a plurality of radially outwardly extending spokes connecting the center mounting portion to the outer rim connecting flange and a ventilation opening provided between each pair of adjacent spokes, the center mounting portion including a center hub hole and a plurality of lug bolt mounting holes , the outer rim connecting flange being parallel to the axis and including a side edge , each of the spokes including a center wall , a generally axially outwardly side wall extending from each end of the center wall, and a bent back outwardly extending outer wall extending from each of the side walls, and the ventilation opening being defined by the side edge of the outer rim connecting flange and the outer walls of adjacent pairs of spoke; characterized in that a width of the central wall and a width of the outer walls considerably narrows or is reduced along a substantial and/or an entire portion thereof as the associated walls (122A; 122B) extend radially outwardly generally from the center mounting portion to the outer flange such that the central wall has a first width (W3) at a point generally near to the center mounting portion and a second width (W4) at a point generally near to the outer flange which is considerably less than the first width (W3), and the outer walls have a third width (W5) at a point generally near to the center mounting portion and a fourth width (W6) at a point generally near to the outer flange which is considerably less than the third width (W5). a steel wheel disc defining an axis (X1) and including a center mounting portion , an outer rim connecting flange , a plurality of radially outwardly extending spokes connecting the center mounting portion to the outer rim connecting flange and a ventilation opening provided between each pair of adjacent spokes, the center mounting portion including a center hub hole and a plurality of lug bolt mounting holes , the outer rim connecting flange being parallel to the axis and including a side edge , each of the spokes including a center wall , a generally axially outwardly side wall extending from each end of the center wall, and a bent back outwardly extending outer wall extending from each of the side walls, and the ventilation opening being defined by the side edge of the outer rim connecting flange and the outer walls of adjacent pairs of spoke; characterized in that a width of the central wall and a width of the outer walls considerably narrows or is reduced along a substantial and/or an entire portion thereof as the associated walls (122A; 122B) extend radially outwardly generally from the center mounting portion to the outer flange such that the central wall has a first width (W3) at a point generally near to the center mounting portion and a second width (W4) at a point generally near to the outer flange which is considerably less than the first width (W3), and the outer walls have a third width (W5) at a point generally near to the center mounting portion and a fourth width (W6) at a point generally near to the outer flange which is considerably less than the third width (W5). <EOS>