Pneumatic tire

摘要

A pneumatic tire improved in on-ice performance and on-snow performance in good balance. The pneumatic tire includes a tread portion extending in a tire circumferential direction and forming a ring shape, a pair of sidewall portions on both sides of the tread portion, respectively, and a pair of bead portions on inner sides of the sidewall portions in a tire radial direction, respectively. The tread portion includes a plurality of longitudinal grooves extending in the tire circumferential direction and a plurality of lateral grooves extending in a tire width direction. The longitudinal and lateral grooves define a plurality of block rows each including a plurality of blocks. Each of the plurality of blocks included in at least one of the block rows includes at least three closed grooves including at least one first closed groove and at least one second closed groove.

主权项

1. A pneumatic tire comprising:
a tread portion extending in a tire circumferential direction and forming a ring shape; a pair of sidewall portions disposed on both sides of the tread portion, respectively, with regard to a tire width direction; and a pair of bead portions disposed on inner sides of the sidewall portions in a tire radial direction, respectively; the tread portion including a plurality of longitudinal grooves extending in the tire circumferential direction and a plurality of lateral grooves extending in the tire width direction, the longitudinal grooves and the lateral grooves defining a plurality of block rows, each of the block rows including a plurality of blocks, each of the blocks included in at least one of the block rows being provided with at least three closed grooves including at least one first closed groove and at least one second closed groove, each of the first closed grooves having one end opened to one of the longitudinal grooves adjacent to the block and having the other end closed in the block, and each of the second closed grooves having one end opened to the other one of the longitudinal grooves adjacent to the block and having the other end closed in the block, and the closed grooves being arranged at inclined angles with respect to the tire width direction such that at least two of the inclined angles are different from each other in each of the blocks provided with the closed grooves, the tread portion including an asymmetrical tread pattern including the plurality of longitudinal grooves, the plurality of lateral grooves, the plurality of block rows and the at least three closed grooves, such that the tire is configured to mount to a vehicle with a particular one of the sidewall portions facing outwardly of the vehicle, and the closed grooves being provided in each of a plurality of blocks included in a block row located toward an inner side of the vehicle relative to the block row on a tire equator.