Abstract: Apparatus casting for injection-molding car tires whose internal contour is determined by a core and whose external contour is established by mold shells which are, at least partially, provided with lateral shells movable in an axial direction, thereby the various regions of the tires being cast or injected in separate operations. The mold shells, in addition to lateral shells, are provided with external segments and at least two external segments of different shape are pivotedly attached to segment holders positioned around the tire being produced so that the segment holders are radially adjustable with respect to the tire under production.