Abstract: The present invention refers to a rotor for a fluid-kinetic machine comprising a rotatably supported hub, the support being provided with axial bearing means, an outer ring which is indirectly supported on said hub, and rotor blades which are arranged in an area between said hub and said outer ring. In order to provide a possibility of utilizing the influence of the gyroscopic effects, which occur during operation of the rotor, for the purpose of stabilizing the rotor, it is suggested in accordance with the invention that the outer ring should be composed of a plurality of arcuate sections in the circumferential direction and should be arranged essentially in the plane of rotation of the axial bearing means, and that the arcuate sections of the outer ring should be under the action of flexible tension elements which embrace said arcuate sections at least partly and which are secured to a carrier ring.