| 摘要 |
PURPOSE:To improve wet grip performance and to reduce tire noise while maintaining dry grip performance CONSTITUTION:A tread part T is divided into shoulder parts 81, 82 and a central part 9 by two pieces of longitudinal grooves 71, 72 extending in the circumferential direction The central part 9 is furnished with groove wall surfaces 9A extending from a groove bottom edge 7a in the inside of the longitudinal grooves 71, 72 in the tire axial direction in a protruded curve and a central part surface shape consisting of a central ground contact area 9B smoothly connecting these groove wall surfaces 9A, 9A, and the central part surface shape makes contact with a virtual tread line 10 connecting ground contact areas 12, 12 of the shoulder parts 81, 82. Ground contact area width of the one shoulder part 81 is specified as larger than ground contact area width of the other shoulder part 82 and groove width of each of the longitudinal grooves 71, 72 is specified as 35mm or more. |
