| 摘要 |
PURPOSE:To form a wheel having a long ground contacting area by winding the tread part of a tire around a rim and front and rear rollers and forming a wheel nearly into a triangular shape in a side view. CONSTITUTION:A tire 11 has a tread part 12, right and left side wall parts 13 and right and left bead parts 14, and each of the right and left bead parts 14 has a bead 15, being formed similarly to the conventional low pressure tire. Front and rear rollers 7F, 7R, each in one pair right and left, are provided on roller shafts 8F, 8R via bearings respectively, and brought into contact with both right and left sides of the inner peripheral face 12a of the tread part 12. The outer peripheral faces of the front and rear rollers 7 are positioned lower than both side edges of the maximum outside diameter of a rim 3, and the tread part 12 is stretched around the front and rear rollers 7 and the rim 3 nearly in a triangular form in a side view. The tire is used at a low pressure and brought into contact with the ground at the part between the front and rear rollers 7 like a crawler.
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