| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent lowering of air tightness of a rim caused by deformation of the rim and a wire spoke and invasion of foreign matter without complication of the shape of the rim and an increase of the weight of the rim over a long period. SOLUTION: A closed space 18 is constituted by holding the vicinity of a peripheral edge part of a spoke hole 12c by a stretched nut 14 and a seal nut 15 from each of a rim outer peripheral surface 12a side and a rim inner peripheral surface 12b side. An end face on the rim inner peripheral surface 12b side of the spoke hole 12c is sealed by pressing a sealing member 16 with the seal nut 15. Even when the rim 12 and the wire spoke 13 are deformed, elongated and contracted by application of impact force, the closed space 18 is maintained to an almost expected shape to prevent deformation of the sealing member 16. Foreign matter such as water, air, salt, etc., is prevented from entering the close space 18 from the rim inner peripheral surface 12b side and a tire side (the rim outer peripheral surface 12a side) to prevent deterioration of the sealing member 16.
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