| 摘要 |
PROBLEM TO BE SOLVED: To provide a spike tire as a tire for winter very effective for preventing a slip and furthermore enabling solving of the problems that a conventional spike tire has. SOLUTION: In this tire, a plurality of holes are provided toward a grounding surface in a tire main body, a hydraulic device capable of changing pressure of the holes by hydraulic pressure is provided, spikes are buried into the holes, and thereby the spikes can be freely taken in/out of the hydraulic device as necessary. COPYRIGHT: (C)2006,JPO&NCIPI
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