A pneumatic tire comprises a tread rubber with a groove depth at a shoulder portion that comes into contact with a road surface of 10 mm or greater. A rubber composition of the tread rubber contains: 60 to 70 parts by mass of carbon black having a nitrogen adsorption specific surface area of 70 to 130 m.sup.2/g, 0.5 parts or greater by mass of sulfur, and a vulcanization accelerator per 100 parts by mass of diene rubber including 50 to 70 mass % of styrene-butadiene rubber, 20 to 30 mass % of butadiene rubber, and 10 to 30 mass % of natural rubber. The diene rubber has an average glass transition temperature of 65 C. or lower. A ratio of a compounded amount of the vulcanization accelerator to a compounded amount of the sulfur is 1.0 to 1.3. The tread rubber has a rubber hardness of 65 to 70 at 20 C.

In a pneumatic tire according to one embodiment, at least one land portion provided on a tread portion includes a first lateral groove traversing the land portion, and a second lateral groove ending inside the land portion, these lateral grooves being arranged at intervals along a tire circumferential direction. A land portion section located between the first lateral groove and the second lateral groove includes a first inclined surface portion in a chamfered shape at an edge portion extending along the first lateral groove, a second inclined surface portion in a chamfered shape at an edge portion extending along the second lateral groove, and, at one edge portion in a tire width direction, a third inclined surface portion in a chamfered shape intervening between the first inclined surface portion and the second inclined surface portion to connect the two and extending along the tire circumferential direction.

A tire has a lug that forms a contact patch surface, and a recessed region that extends along a prescribed direction and that is recessed relative to the contact patch surface. The recessed region has a first vertical face that that forms a first edge between the first vertical face and the contact patch surface, and a planar base that extends in a width direction of the recessed region which is perpendicular to the prescribed direction. The planar base has at least two planar regions having mutually different heights and arrayed along the prescribed direction. The recessed region further has a second vertical face that connects the two planar regions and that forms a third edge between the second vertical face and a higher one of the planar regions. The third edge is inclined with respect to both a tire width direction and a tire circumferential direction.

A tire has a lug, a sipe and a recessed region. The sipe having an opening sidewall extending in a vertical direction. The recessed region that is formed to either side in a width direction of the sipe. The recessed region has a vertical face that forms a first edge, and has a planar base that intersects the opening sidewall of the sipe. The planar base and the opening sidewall of the sipe forming a second edge at which the angle between the planar base and the opening sidewall is not greater than 90. Difference in height in the vertical direction of the first edge and the second edge is greater than or equal to 0.5 mm but is less than or equal to 1.5 mm. Distances to the first edge and the second edge in the width direction of the sipe are not less than 1.5 mm.

A pneumatic tire includes a tread; sidewalls; and beads. Lug grooves are formed in the tread inclining symmetrically about an equator, an inclination angle of the lug grooves relative to the lateral direction being 1545. A width W1 of the lug grooves at the tread edge and an interval W2 between the lug grooves at the tread edge satisfying 0.7W1/W21.5. Shoulder grooves connecting lug grooves are inclined in an opposite direction to the lug grooves have an inclination angle relative to the lug grooves being 80100, a center position of the shoulder grooves being 15% to 35% of tread width TW from the equator. An area A1 of the shoulder grooves and an area A2 of shoulder blocks satisfy 0.2A1/A20.6. A groove area ratio of the tread is 0.4 to 0.7.

A pneumatic tire includes at least four circumferential main grooves extending in the tire circumferential direction; and at least five rows of land portions including a center land portion, a pair of second land portions, and a pair of shoulder land portions, which are defined by the circumferential main grooves. Additionally, at least one row of the second land portions is provided with a plurality of lug grooves penetrating through the second land portion in the tire width direction, and a plurality of blocks defined by the plurality of lug grooves. Moreover, the plurality of blocks include one of the circumferential narrow grooves, respectively, which penetrates through the blocks in the tire circumferential direction.

The tire includes a tread portion having circumferential grooves extending in a tire circumferential direction and land regions demarcated by the circumferential grooves. The circumferential grooves include a first circumferential groove and a second circumferential groove adjacent to the first circumferential groove and having a width larger than the first circumferential groove. The land regions include a first land region demarcated between the first circumferential groove and the second circumferential groove. The first land region has lateral grooves extending in a tire axial direction and lateral sipes extending in the tire axial direction and each having a width smaller than that of each of the lateral grooves. A total value of the widths of the lateral grooves and the lateral sipes connected to the second circumferential grooves is smaller than a total value of the widths of the lateral grooves and the lateral sipes connected to the first circumferential grooves.

A tire includes a tread portion including a row of blocks arranged in a tire circumferential direction divided by lateral grooves. Each block includes a block tread surface, a first block sidewall surface located on a leading side in a rotation direction of the block, and a leading-side corner portion between the block tread surface and the first block sidewall surface. The leading-side corner portion includes a first portion and a second portion extending in a tire axial direction. The first portion is formed sharper than the second portion. In a plan view of each block, an angle 1 of the first portion to the tire circumferential direction is larger than an angle 2 of the second portion to the tire circumferential direction. Each lateral groove has a groove width (A) at the first portion that is larger than a groove width (B) at the second portion.

A tyre includes a tread portion including an outboard middle land portion disposed between an outboard tread edge and a tyre equator. The outboard middle land portion includes first and second longitudinal edges, outboard middle lateral grooves extending from the first longitudinal edge and having terminal ends within the outboard middle land portion, first outboard middle sipes extending from the respective terminal ends of the outboard middle lateral grooves to the second longitudinal edge, and second outboard middle sipes extending from the first longitudinal edge toward the second longitudinal edge beyond the terminal ends of the outboard middle lateral grooves and terminating within the outboard middle land portion. The outboard middle land portion is not provided with any lateral grooves that extend from the second longitudinal edge toward the first longitudinal edge to reach an axial center location of the outboard middle land portion.

A tyre includes a tread portion having an outer shoulder main groove, a crown main groove, and an outer middle land region defined between the outer shoulder main groove and the crown main groove. The outer middle land region is provided with first middle sipes each extending inwardly in a tyre axial direction from the outer shoulder main groove to have an inner end in the outer middle land region and second middle sipes each extending outwardly in the tyre axial direction from the crown main groove to have an outer end in the outer middle land region. The number of the second middle sipes is larger than the number of the first middle sipes.