| 摘要 |
PURPOSE:To provide a pneumatic tire having the capability of reducing tire noise via the reduction of sound energy itself. CONSTITUTION:In a tire having blocks 1 of a plurality of main grooves 2 extended in a tire peripheral direction, and sub-grooves 3 extended in a tire radial direction intersecting the main grooves 2 respectively on a tread, the angle of the tread of the blocks 1 in a meridian section with the side walls 5 and 6 of the main grooves 2 or sub-grooves 3 is made smaller at the tread side than the peripheral center of the blocks 1. |
