| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk wheel for an automobile light in weight and improved in the rigidity of the disk wheel. SOLUTION: The present invention enables to provide a lightened automobile wheel superior in the rigidity by means of setting a 30-50 mm fitting length T, disposing a set of continuous welding edges 15 each having a welding length k of 30-50 mm, fixing the number of the welding edges 15 in eight as a whole disk, and selecting a pitch d between adjacent continuous welding edges 15, 15 within the range of 30-100 mm.
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