| CPC B62L 1/005 (2013.01) | 25 Claims |

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1. A wheel component comprising:
a fixing ring for attaching a brake disk device to the hub shell of a bicycle hub;
and with a securing unit for securing the fixing ring;
wherein the fixing ring comprises a fixing unit extending in the radial direction;
and a tube unit extending in the axial direction on which a thread is configured to screw the thread of the tube unit with the thread on the hub shell and to attach the brake disk device to a bicycle hub;
the fixing unit comprises at least one axial through hole which is configured and disposed such that the at least one axial through hole is at least in partial axial alignment with a cavity in the brake disk device in the mounted state of the fixing ring, so that a securing arm of the securing unit can be inserted into the cavity of the brake disk device through the through hole in the fixing unit, so that the securing arm effects a safety lock for the fixing ring so as to prevent inadvertent detachment of the fixing ring; and
wherein said at least one axial through hole is configured as a radially open groove.
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