| 摘要 |
PURPOSE:To reduce damage of a road surface and a noise at the time of running on a general road, by arranging a sheet rubber layer, whose temperature dependency of hardness is larger than that of a tread rubber layer, on a laying position of a flange of a spike driven in a tire tread part. CONSTITUTION:A tread part 10 of a tire is formed of by arranging in order an under tread layer 12, a belt layer 13 and a carcass layer 14 on the inside of a tread rubber layer 11. An inner liner 15 is sticked on the inside of the carcass layer 14. A sheet rubber layer 16 is provided continuously between the tread rubber layer 11 and the under tread layer 12 in the circumferential direction of the tire, and a flange 22 of a spike 20 driven into the tread rubber layer 11 is laid into a sheet rubber layer 16. As for the sheet rubber layer 16, a rubber material having peculiarities, through which, for example, hardness of the same becomes higher than the tread rubber layer 11 at a temperature of less than 5 deg.C and becomes equivallent to or smaller than the tread rubber layer 11, is used. |
