| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire improved in durability by improving cutting-resistance and heating durability in a crown part of the pneumatic tire and preventing a failure due to a damage by cutting and the heat to restrict deterioration of appearance. SOLUTION: A tread rubber 5 of the pneumatic tire 1 is formed into two-layer structure, and a base rubber layer 21 formed by arranging a pair of lower heating base rubber pieces 25 with a space in the cross direction is provided near an end of the belt layer 10 easy to be damaged by the heat, and the only cap rubber layer 20 having excellent cutting-resistance is arranged near a central part of the tread easy to be damaged by cutting. A first belt 11 of the most inside layer of the belt layer 10 is divided in the cross direction to reduce rigidity of the central part of the belt layer 10. COPYRIGHT: (C)2007,JPO&INPIT |
