The present disclosure provides rotors for long-stator linear motor systems, having at least two rollers for mounting the rotors on parallel guide rails of the long-stator linear motor system, wherein the rotors comprise at least one rotatable bolster, on which at least one roller, in particular at least one pair of rollers, of the at least two rollers is rotatably mounted, and/or at least one roller with a steering rotational axis with integrated castor, wherein the roller is mounted on a roller axle by means of a bolt, via an asymmetric and/or sloping bore, and further comprises a pendulum ring which is mounted on the bolt and has an external ball or slide bearing.