| 摘要 |
PURPOSE:To prevent the reduction of uniformity by eliminating a flapping phenomenon of the belt layer in a tire in which the groove width of a main groove is set larger than the groove depth, and 6% or more of the tread development width. CONSTITUTION:At least one main groove 2 whose groove width is larger than the groove depth, and the groove size is 6 to 9% of the tread development width, extending in the tire circular direction, numerous subgrooves 3 extending in the tire width direction, and plural associate main grooves 4 extending obliquely at the angle 3 to 30 deg. to the tire circular direction and larger than the earthing length of the tire, are provided on a tread surface 1, and on the groove bottoms of the main groove 2 and the associate main grooves 4, at least one projection line 5 extending along the main groove 2 of the associate main groove 4 is formed respectively to form this pneumatic tire for passenger car. |
