| CPC B60C 11/1323 (2013.01) [B60C 11/0309 (2013.01)] | 13 Claims |
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1. A tire, comprising:
a plurality of main grooves extending in a tire circumferential direction;
a land portion defined by the main grooves;
a plurality of lug grooves passing through the land portion; and
a plurality of blocks defined by the plurality of main grooves and the plurality of lug grooves,
each of the plurality of blocks including at least one bend point and having a bent shape that projects inward of the blocks,
the main grooves having a bend point at which an angle of a groove wall with respect to a normal line of a tread surface changes in a meridian cross-section, and
in a first block and a second block, among the plurality of blocks, that are adjacent to each other in a tire width direction with one of the main grooves interposed therebetween,
in a plan view of the tread surface, an angle between a line extended from a ridge line formed by the bend point of a groove wall on a first block side of the one of the main grooves between the first block and the second block and a line extended from a groove wall of the one of the lug grooves defining the first block being larger than an angle between a line extended from a ridge line formed by the bend point of a groove wall on a second block side of the one of the main grooves between the first block and the second block and a line extended from a groove wall of the one of the lug grooves defining the second block, and
in a meridian cross-section, an angle of the groove wall on the first block side of the one of the main grooves between the first block and the second block with respect to a normal line of the tread surface being smaller than an angle of the groove wall on the second block side of the one of the main grooves between the first block and the second block with respect to a normal line of the tread surface,
wherein, in a plan view of the tread surface, a ratio L2/L1 of a length L2 of a section in which an angle of a groove wall on the first block side of the one of the main grooves is constant with respect to a length L1 in the tire circumferential direction of an edge on the second block side of a road contact surface of the first block is 0.15 or more and 0.70 or less, and a position of a midpoint of the section having length L2 is included in a position of 40% to 60% of the length L1 between one end portion and an other end portion of both end portions of the length L1.
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