A tire comprises a tread of width (W), having a total volume VT, comprising voids (221, 211, 212) defining a voids volume VE. There is defined TEV=VE/VT. Voids (211) delimit blocks (21A, 21B) organized into patterns (26) of pitch P succeeding one another in the circumferential direction (X). Part of the voids forms sipes (211, 212) in one of the patterns. SD corresponds to the ratio of a sum of the projected lengths (lpyi) of the sipes in an axial direction (Y) to the product P times W, multiplied by 1000. The tread forms a contact patch AC and blocks (21A, 21B) form a contact surface SC: TES=(AC−SC)/AC. For the tread when new, SD in any pattern of pitch P is comprised between 10 mm.sup.−1 and 70 mm.sup.−1, and TES/TEV is comprised between 1.5 and 1.9.

A tyre comprises a tread portion having a land region including a ground contacting surface defined between a first vertical edge and a second vertical edge and a lateral groove including a first portion extending from the first vertical edge, a second portion extending from the second vertical edge, and a connection portion connecting therebetween. The connection portion is a portion between a first small edge protruding circumferentially from the first portion and a second small edge protruding toward a circumferentially opposite side to the first small edge. A length in the tyre circumferential direction of each of the first and second small edges is smaller than a maximum groove width of each of the first and second portions. At least a part of the connection portion has a raised bottom portion having a depth smaller than that of the lateral groove at the first and second vertical edges.

A tire includes a tread portion provided with at least one circumferentially extending zigzag main groove having a groove bottom, the at least one main groove including first inclined portions, second inclined portions each inclined in an opposite direction to the first direction, and first intersections where the first inclined portions and the second inclined portions are communicated with each other. The first inclined portions and the second inclined portions are arranged alternately in the tire circumferential direction. The first inclined portions are longer than the second inclined portions. The groove bottom of the at least one main groove is provided with at least one protruding part extending in a width direction of the at least one main groove, and a distance between the at least one protruding part and one adjacent first intersection is equal to or less than 2 times groove widths of the first intersections.

A pneumatic tire of the present disclosure includes, on a tread surface, a plurality of circumferential main grooves extending in the tire circumferential direction, and a plurality of land portions defined between circumferential main grooves adjacent in the tire width direction among the plurality of circumferential main grooves or by the circumferential main grooves and tread edges. The land portions include at least one circumferential sipe extending in the tire circumferential direction. The circumferential sipe includes a plurality of widened portions arranged in the tire circumferential direction. In a reference state, each widened portion is formed only from a portion that, from one side towards the other side in the tire circumferential direction, extends from the tread surface inward in the tire radial direction.

A tire according to this disclosure includes a rib-like or block-like land portion in contact with a road surface. The land portion includes a plurality of sipes. The end portion of the sipe positioned on the earlier contact side in contact with the road surface earlier as the tire rotates terminates in the land portion. The end portion of the sipe positioned on the later contact side in contact with the road surface lately as the tire rotates opens to the side wall of the land portion.

A pneumatic tire can suppress uneven wear of the tire and improve the performance on snow. A plurality of inner side circumferential grooves (11a, 11b, 11c) arrayed between a pair of outermost side circumferential grooves (11d, 11d) have a groove width that is smaller than that of the outermost side circumferential grooves (11d) to such a degree allowing land portions on the opposite sides thereof to come into contact with each other upon grounding. A plurality of recessed portions (S) of a shape cut in a radial direction from a tread face are formed along the tire circumferential direction on opposing block wall faces (14Af, 14Bf) of blocks (14A, 14B) on the opposite sides of at least one (11b) of the inner side circumferential grooves.

A pneumatic tire can suppress uneven wear of the tire and improve the performance on snow. A plurality of inner side circumferential grooves (11a, 11b, 11c) arrayed between a pair of outermost side circumferential grooves (11d, 11d) have a groove width that is smaller than that of the outermost side circumferential grooves (11d) to such a degree allowing land portions on the opposite sides thereof to come into contact with each other upon grounding. A plurality of recessed portions (S) of a shape cut in a radial direction from a tread face are formed along the tire circumferential direction on opposing block wall faces (14Af, 14Bf) of blocks (14A, 14B) on the opposite sides of at least one (11b) of the inner side circumferential grooves.

A tire includes a tread portion 2. A middle land portion 7 of the tread portion 2 has a first middle lateral groove 11. The first middle lateral groove 11 includes a first groove portion 31, a second groove portion 32 inclined in the same direction as the first groove portion 31, and a third groove portion 33 located between the first groove portion 31 and the second groove portion 32 and inclined relative to a tire axial direction in a direction opposite to that of the first groove portion 31. The first groove portion 31 has a groove width increasing from the third groove portion 33 toward an outer side in the tire axial direction. The second groove portion 32 has a groove width increasing from the third groove portion 33 toward an inner side in the tire axial direction.

A tire includes a tread portion 2. At least one middle lateral groove 10 includes first and second middle tie bars 16 and 17. First and second middle sipes 21 and 22 are provided on a ground-contact surface 15s of at least one middle block 15. The first middle sipe 21 includes a termination end 21a located on an inner side in a tire axial direction with respect to the first middle tie bar 16. The second middle sipe 22 includes a termination end 22a located on an outer side in the tire axial direction with respect to the second middle tie bar 17 and on the inner side in the tire axial direction with respect to the termination end 21a of the first middle sipe 21. On the ground-contact surface 15s of the middle block 15, no groove and no sipe are provided in a first region 23.

A tire includes a tread portion 2. At least one middle lateral groove 10 includes first and second middle tie bars 16 and 17. First and second middle sipes 21 and 22 are provided on a ground-contact surface 15s of at least one middle block 15. The first middle sipe 21 includes a termination end 21a located on an inner side in a tire axial direction with respect to the first middle tie bar 16. The second middle sipe 22 includes a termination end 22a located on an outer side in the tire axial direction with respect to the second middle tie bar 17 and on the inner side in the tire axial direction with respect to the termination end 21a of the first middle sipe 21. On the ground-contact surface 15s of the middle block 15, no groove and no sipe are provided in a first region 23.