The present design is that, the vehicle body 10 backward the bottom plate 13, bottom plate 13, which bokgae to detachably to the tire receiving recess 12 of the trunk 11 and, formed on the on-purpose trunk board the vehicle of when the upper surface a predetermined wheel support member 14 and the wheel support member and the wheel 16 which are respectively coupled to chukpin 15 to 14, the bottom plate 13 which is coupled so as to be rotatable in each corner region and it consists of the strap (17) fixed to the region, while driving the vehicle, and a cover role of the spare tire (20), and used as a luggage tools when luggage, in case of gyeongjeongbi there would have to be used as a workbench.
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