Abstract: The wheel holding member for a vehicle has a rod-like shape, and includes: a thread portion, which is formed on an end portion on a proximal end side, and has a male thread threadedly engageable with a hub bolt hole formed in a wheel hub; a holding portion, which protrudes toward a distal end side with respect to the thread portion, and has no thread on an outer periphery thereof; and a tool insertion hole, which is exposed from an end surface on the proximal end side, and to which a tool for rotating the wheel holding member is insertable. A bottom surface of the tool insertion hole is located on the distal end side with respect to an end of the thread portion on the distal end side.

Abstract: A structure for assembling a tire wheel, a brake rotor, and a hub includes at least one positioning bolt which includes a first head portion and a first shaft portion having a first male screw portion formed thereon; and a plurality of position-fixing bolts each of which includes a second head portion and a second shaft portion having a second male screw portion formed thereon. When an elastic body attached to the first shaft portion is squeezed between the hub and the first head portion of the positioning bolt as a result of the first male screw portion being screwed into a positioning female screw hole of the hub, the elastic body deforms to have an increased outer diameter as compared with the case where the elastic body is in its free state.

Abstract: The wheel holding member for a vehicle has a rod-like shape, and includes: a thread portion, which is formed on an end portion on a proximal end side, and has a male thread threadedly engageable with a hub bolt hole formed in a wheel hub; a holding portion, which protrudes toward a distal end side with respect to the thread portion, and has no thread on an outer periphery thereof; and a tool insertion hole, which is exposed from an end surface on the proximal end side, and to which a tool for rotating the wheel holding member is insertable. A bottom surface of the tool insertion hole is located on the distal end side with respect to an end of the thread portion on the distal end side.

Abstract: A structure for assembling a tire wheel, a brake rotor, and a hub includes at least one positioning bolt which includes a first head portion and a first shaft portion having a first male screw portion formed thereon; and a plurality of position-fixing bolts each of which includes a second head portion and a second shaft portion having a second male screw portion formed thereon. When an elastic body attached to the first shaft portion is squeezed between the hub and the first head portion of the positioning bolt as a result of the first male screw portion being screwed into a positioning female screw hole of the hub, the elastic body deforms to have an increased outer diameter as compared with the case where the elastic body is in its free state.