| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of studs embedded in a tread of a tire in the car application in which the traveling during a summer time or the like in addition to the traveling during a winter time is comfortable. SOLUTION: The stud 3 having a base mount 4 in a part having an edge 8 at a tip of the tread 2 of the tire 1 is embedded, erected surfaces 7 and 7 orthogonal to perpendicular surfaces 6 and 6 perpendicular to the traveling direction of a shank of the stud 3, and the stud 3 is selectively projected/ retracted via a floating part 3' within the tread 2 in response to the change in the air pressure in the tire 1 with the set temperature as the threshold, and the stud 3 is projected/retracted from the traveling surface of the tire 1. Traveling in every season prevents any slip in the braking or the like during a winter time, and also prevents any dust pollution or noise generation when traveling on a general road during a summer time, and the comfortable traveling is maintained smoothly. Stable traveling of non-slip by the studs during a winter time is guaranteed, dust generation and noise generation are suppressed in general traveling during a summer time or the like, and light hearted traveling can be realized.
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