| 摘要 |
A pneumatic tire with a block pattern has a tread edge including edges along circumference of each of the plurality of blocks and groove edges along a circumference of block grooves provided, as required, in the block, and of which at least one end of each of the block grooves is terminated in the block. The tread edge has a lateral edge density .alpha. defined as a ratio A/S of the sum A of a length of edge components in the lateral direction of the tread edge which face toward a leading edge of the tire tread element and are placed in a ground-contact zone of the tread part to an area S of the ground-contact zone, the lateral edge density being in a range of 0.085 to 0.15(1/mm). The ratio .alpha./.beta. of the lateral edge density .alpha. to a circumferential edge density .beta. is defined as a ration B/S of the sum B of a length of the edge components in the circumferential direction of the tread edge which face toward an outer end of the ground-contact zone of a block within which the component is located and are placed in the ground-contact zone, the ratio .alpha./.beta. being in the range of 2.0 to 3.5.
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