To improve the riding comfort and controllability and stability of a vehicle by restraining vibrations during traveling of the vehicle while simplifying an operation for mounting a light alloy wheel 7 and reducing cost.

After a light alloy wheel 7 is set to a hub 5, a centering bolt 25 penetrates through a through-hole 11 of a centering collet 3, and is screwed into a screw hole 27, so as to insert a tip of the centering collet 3 between a hub sleeve 23 and a wheel hub hole 31 while a collet side taper 3t pressure contacts a hub side taper 23t. Therefore, a wheel disc 29 is pressurized from inside of the wheel hub hole 31 by the tip of the centering collet 3 while pressing the tip of the centering collet 3 to the hub sleeve 23, so as to align the light alloy wheel 7 with the hub 5.