Tire

A tire comprising:

• a tread portion for which an intended tire rotational direction is specified,
• the tread portion comprises block rows composed of blocks circumferentially divided by lateral grooves and arranged circumferentially of the tire,
• the blocks each have a ground contacting top surface, a first side wall surface located on a heel-side in the intended tire rotational direction of the ground contacting top surface, and a second side wall surface located on a toe-side in the intended tire rotational direction of the ground contacting top surface,
• the first side wall surface and the second side wall surface are both inclined so that a distance therebetween measured in parallel with the ground contacting top surface becomes decreased toward a radially outside of the tire, and
• in a cross section of each of the blocks which is parallel with a tire equatorial plane, an angle θ2 with respect to a tire radial direction of the second side wall surface is larger than an angle θ1 with respect to a tire radial direction of the first side wall surface, and
• an angle difference θ2-θ1 between said angle θ2 and said angle θ1 increases toward one side in a tire axial direction, and said angle θ1 of the first side wall surface is constant along a length of a respective lateral groove formed between the first and second side wall surfaces in the tire axial direction,
• wherein
• the blocks include shoulder blocks,
• the block rows include a pair of axially outermost shoulder block rows each composed of the shoulder blocks circumferentially divided by shoulder lateral grooves,
• each of the shoulder lateral grooves comprises
• an axially inner first portion of which axially inner end is connected to a shoulder main groove extending circumferentially of the tire, and
• an axially outer second portion of which axially inner end is connected to an axially outer end of the axially inner first portion,
• the axially inner first portion has a constant groove width along its length,
• the axially outer second portion has a variable groove width gradually increasing toward an adjacent tread edge, wherein the axially outer second portion has a first groove edge extending straight from the first portion in a top view of the shoulder lateral groove, and a second groove edge extending from the first portion in a bent manner in the top view of the shoulder lateral groove so as to have said variable groove width,
• wherein
• the blocks further include middle blocks, and
• the block rows further include a pair of axially inner middle block rows each composed of the middle blocks circumferentially divided by middle lateral grooves and arranged between the shoulder block rows,
• wherein
• the middle lateral grooves in each of the axially inner middle block rows include
• first middle lateral grooves bent convexly toward one side in a tire circumferential direction, and
• second middle lateral grooves bent convexly toward the other side in the tire circumferential direction.