Bicycle wheel securing structure

A bicycle wheel securing structure comprising:

• a bicycle fork having a pair of axle support portions that are spaced apart to receive a bicycle hub therebetween and with one of the axle support portions having an adapter receiving bore;
• an adapter disposed in the adapter receiving bore in one of the axle support portions, with the adapter including a threaded axle mounting opening, an axially facing surface that faces in an axial direction of the threaded axle mounting opening, and an outer circumferential surface;
• and
• a holding member operatively coupled between the adapter and the one of the axle support portions with the adapter, the holding member including an attachment portion that is attached to the bicycle fork, and an engagement portion that is selectively movable between a retaining position and a releasing position, the engagement portion prevents both rotational movement of the adapter with respect to the bicycle fork and axial movement of the adapter with respect to the bicycle fork along an axis of the axle mounting opening while the holding member is in the retaining position with the engagement portion contacting the axially facing surface of the adapter to prevent the axial movement of the adapter, the axially facing surface being a visible surface as viewed along the axial direction of the threaded axle mounting opening from one axial end face of the adapter while the holding member is in the releasing position, and
• the adapter being rotatable within the adapter receiving bore without moving axially with respect to the bicycle fork while the holding member is in the releasing position.