The disc brake has a brake disc (11) secured by a fixing device which has a guide device (120) which guides the brake disc during axial displacement relative to the brake calliper (12). The socket section (111) of the hub has a polygonal cross-section whilst the brake disc (10) has an opening in the centre corresponding to the shape of this socket section. The guide device has a sleeve mounted displaceable on the socket section of the hub.
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