Abstract text

A wheel is positioned at an initial position by partially fitting a tire, from above, to the wheel in a slanting direction. From state where the wheel is positioned at the initial position, an expander, which expand paired bead portions of the tire in a radial direction of the wheel, is turned around the rotational axis of the wheel. In the initial position, the tire is positioned with respect to the wheel while an accessory does not overlap a lower portion of a lower bead portion that is provided at a lower position from among the paired bead portions in the initial position, the lower portion being provided below an upper rim flange portion that is provided at an upper position from among the paired rim flange portions, and the lower portion already being fitted to the wheel.