| 摘要 |
PURPOSE:To reduce a noise at the time of running a pneumatic tire for heavey load and saving a cost of manufacturing a tire molding mold. CONSTITUTION:In a tread pattern, a number of pitches of blocks 3, 7, 9, 10, 18, 19 in each block row 4, 11, 12, 13, 14, 15, adjacent to each other, is different from each other, and also a number of pitches of the other block row relating to a block row, having a minimum pitch number A is An [where, n is value of 1.25 to 3.5 except (2+ or -0.25) range]. A product (c) of depth (a) and width (b) of lateral grooves 6, 8, 16, 17 of partitioning each block row is in a relation of inverse proportion to a number of pitches of the block row, and further the block row of pitch, with ratio of the pitch number relating to the block row having a minimum pitch number A in a 3+ or -0.5 range, is arranged in a row except the outermost end block row relating to the peripheral direction center line. |
