Outline
Security device for preventing theft of a wheel of a motor vehicle, characterized in that it comprises: a freely rotating ring (1), a core (2) with a threaded hole arranged inside the ring (1), a skirt (4) with a hole for receiving the core (2), which at its outer end it has a connection surface (9) for a standard transmission tool, and where the bore comprises locking elements (7b), it can be moved in the bore of the skirt (4) between a release and a fixing position along the longitudinal direction of the skirt (4) a locking platform (3) provided with locking elements (7a) on the side surface, the side locking elements (7a) of which in the fixing position of the locking platform (3) fit into the locking elements (7b) formed in the bore of the skirt, and further locking means there are locking elements (8a) which, in the release position of the locking platform (3), fit into the locking elements (8b) formed at the outer end of the core (2), and a a safety cylinder lock insert (5) recessed in the casing (4), which has a pivotable pin (6) connected to the locking platform (3) at its inner end.