Abstract: A tire having a tread portion provided with a first circumferential groove and a second circumferential groove each extending in the tire circumferential direction, and lateral grooves connecting between the first circumferential groove and the second circumferential groove. The first circumferential groove extends zigzag and comprises a radially outer first portion having the smallest width and a radially inner second portion having a width larger than that of the first portion.

Abstract: 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.

Abstract: A two-wheeled vehicle tire achieves a further improvement particularly in the traction performance during turning on soft ground. A two-wheeled vehicle tire includes a tread portion formed in an annular shape. The tread portion includes: center land portions arranged on a tire equator CL; middle land portions arranged on the tire width-direction outer side of the center land portions; and shoulder land portions arranged on the tire width-direction outer side of the middle land portions, and T-shaped or Y-shaped land portions each constituted by three partial land portions connected at one end are arranged between the center land portions and the shoulder land portions.

Abstract: A tire has a tread portion provided with three or four circumferential grooves including a shoulder circumferential groove to form a shoulder land region and a middle land region. The middle land region is provided with a middle circumferential sipe and middle lateral sipes. The shoulder land region is provided with shoulder lateral grooves extending from the shoulder circumferential groove to a tread edge, and shoulder lateral sipes extending from the shoulder circumferential groove and terminated without reaching the tread edge.

Abstract: A motorcycle tire for running on rough terrain includes a tread portion. The tread portion includes a base surface and a plurality of blocks. The blocks include a crown block arranged on a tire equator side and a shoulder block arranged on a tread edge side. A height of the shoulder block from the base surface is larger than a height of the crown block from the base surface. The shoulder block is provided on the base surface side with a base portion that has a locally increased cross-section taken along the base surface.

Abstract: In a tire 12, a tread 14 includes a tread main body 44 and edge portions 46. A wear resistance index of each edge portion 46 obtained according to JIS K6264-2 is higher than that of the tread main body 44. An outer surface S of the tire 12 includes a tread surface ST, a pair of shoulder surfaces SH connected to the tread surface ST, and a pair of side surfaces SW connected to the shoulder surfaces SH. Each shoulder surface SH includes an outer surface formed by the edge portion 46, and a contour of each shoulder surface SH is represented by a circular arc having a center at an inner side.

Abstract: A tire has a tread portion bound with an intended rotational direction. The tread portion is provided with at least one block. Each block includes a ground contacting surface, which is defined by edges, and side surfaces positioned radially inside the ground contacting surface. The edges include a heel-side edge located on a heel side in the rotational direction and a toe-side side edge extending toward a toe side in the rotational direction from the heel-side edge. The heel-side edge is connected to one of the side surfaces without having a chamfer portion therebetween. At least a toe-side region, which is a region positioned on the toe side in the rotational direction, of the toe-side side edge is connected to the side surfaces each with the chamfer portion therebetween.

Abstract: In a pneumatic tire, a tread portion is provided with center blocks and shoulder blocks, and sidewall portions are each provided with side blocks. Surfaces of the blocks are provided with groove elements each including a narrow groove and/or a sipe. The first groove elements provided in the side blocks, the second groove elements provided in the shoulder blocks, and the third groove elements provided in the center blocks form a set of lateral groove group extending continuously from the side block on a first side to the side block on a second side in the tire lateral direction along the blocks across a main groove or an auxiliary groove.

Abstract: A tire 1 includes a tread portion 2 provided with a block 3. A block corner portion 5 of the block 3 has a stepped chamfered portion 7 formed therein in which a block height decreases stepwise from a tread surface 3a toward a top portion 3b. The stepped chamfered portion 7 includes upper surfaces 10 parallel to the tread surface 3a, and step corner portions 12 each formed so as to protrude toward a block outer side as a result of the upper surface 10 and a vertical surface 11 or the vertical surface 11 and the tread surface 3a intersecting each other. An angle ?1 between the tread surface 3a and a virtual straight line n3 connecting the step corner portions 12 in a vertical cross-sectional view, of the block corner portion 5, passing through the top portion 3b is 10 to 40 degrees.

Abstract: A pneumatic tire is provided, the pneumatic tire including a tread portion, sidewall portions, and bead portions, and the pneumatic tire includes, in the tread portion, a center main groove extending in a tire circumferential direction and a shoulder main groove extending in the tire circumferential direction on the outside of the center main groove; a land portion between the main grooves; lug grooves extending inward in a tire lateral direction from the shoulder main groove and terminating without communicating with the center main groove; a bent portion bending toward one side in the tire circumferential direction, at a terminating end of each of the lug grooves; and a raised bottom portion included in the bent portion, creating a level difference with respect to a lug groove, and being shallower than the lug groove.

Abstract: A pneumatic tire includes a tread; sidewalls; and beads. The tread includes main grooves, including a center main groove extending in a tire circumferential direction and a pair of shoulder main grooves extending in the tire circumferential direction, and land portions defined between the main grooves. At least one of the land portions includes lug grooves extending from at least one of the main grooves defining the at least one of the land portions and terminating within the at least one of the land portions. At least one of the lug grooves includes a raised bottom portion that is shallower than a groove bottom at a portion on an opening end side and a communicating portion that extends in a longitudinal direction of the at least one of the lug grooves following the raised bottom portion and is deeper than the raised bottom portion.

Abstract: A tire includes a tread formed with tread elements that include a dual angled chamfer. The tire includes a pair of sidewalls extending radially outward to a ground-engaging tread. A plurality of circumferentially-extending grooves extend about the tread and define a plurality of ribs. A plurality of laterally-extending grooves cooperate with the circumferential grooves to divide the ribs into tread elements. A plurality of selected tread elements are formed with a dual angled chamfer. Each of the selected tread elements includes a body, a radially outer, ground-engaging surface, a chamfer side, and a dual angled chamfer that is formed in the body between the ground-engaging surface and the chamfer side.

Abstract: A tyre includes a tread portion including a groove bottom surface and a plurality of blocks protruding from the groove bottom surface. The plurality of blocks includes one or more multi-height blocks. Each multi-height block includes a first block portion having a first height from the groove bottom surface, a second block portion having a second height from the groove bottom surface, a third block portion having a third height from the groove bottom surface, and a block groove to define the first block portion, the second block portion and the third block portion. The second height is higher than the first height, and the third height is higher than the second height.

Abstract: A tire has a lug, a plurality of first recessed regions that extend from a first major groove, and a plurality of second recessed regions that extend from a second major groove. A central region of the lug protrudes relative to either end of the lug. The plurality of first and second recessed regions are arranged in alternating fashion along a tire circumferential direction. The respective recessed regions each has a planar base that extends in a width direction of the each recessed region. The planar base is horizontal, or is inclined in such fashion that a height thereof increases so as to extend further toward an exterior in a tire radial direction as one proceeds toward a center of the each recessed region. Width of the planar base increases as one proceeds from the center in the width direction of the lug to an end of the lug.

Abstract: A pneumatic tire is provided with an electrically conductive portion at least extending continuously from a bead portion to a belt layer. The electrically conductive portion has a linear structure. The linear structure includes an electrically conductive linear member linearly formed of electrically conductive material with an electrical line resistivity of less than 1×10{circumflex over (?)}8 ?/cm. The electrically conductive portion ensures an electrically conductive path from the bead portion to the belt layer.

Abstract: A pneumatic tire includes an inclined groove disposed in a first land portion and/or a second land portion which includes at least two bent portions. A sipe is disposed in the first land portion and/or the second land portion so as to intersect the inclined groove at 90°±30°. The sipe includes at least one bent portion.

Abstract: A tyre comprises a tread portion having a main groove extending continuously in a tyre circumferential direction and a pair of land regions adjacent to the main groove on both sides thereof. At least one of the pair of the land regions has, on an edge thereof facing the main groove, a plurality of main groove side step-like portions each having a height decreasing stepwise in two or more steps from a ground contacting surface of the at least one of the pair of the land regions to a bottom surface of the main groove. The main groove side step-like portions include at least a first main groove side step-like portion and a second main groove side step-like portion having different numbers of the steps from each other.

Abstract: Tread of a tire (1) for a heavy-duty vehicle of civil engineering type. The tread (2), having an axial width WT and having a radial thickness HT at least equal to 70 mm, comprises at least two circumferential grooves (3) positioned axially on each side of an equatorial plane (XZ). Each circumferential groove (3) has an axial width W and a radial depth H, such that the ratio W/H is at least equal to 0.06, the axial distance C between two consecutive circumferential grooves (3) is at least equal to 12% and at most equal to 21% of the axial width WT of the tread and each of the axially outermost circumferential grooves (3) is positioned axially, with respect to the equatorial plane XZ, at an axial distance LE at least equal to 35% of the axial width WT of the tread.

Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential directions and a plurality of land lines defined by the plurality of main grooves, on a tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A void ratio of a first area positioned on one side of a center of a width of the at least one land line is larger than a void ratio of a second area positioned on the other side. A protruding height of the second area from the profile line is larger than a protruding height of the first area.

Abstract: A pneumatic tire includes a tread portion including main grooves and land portions. In a cross-sectional view of the tire, one of the land portions includes a first edge, a second edge, a ground contact surface extending between the first edge and the second edge and having an arc-shaped profile protruding radially outwardly, and conductive portion made of conductive rubber. The conductive portion extends from a radially inner end to a radially outer end exposed at the ground contact surface with an inclination toward the first edge. The inner end is connected to a tire internal structural member to be electrically connected to a rim when the tire is mounted on the rim. On the ground contact surface, a central position of the outer end is located on a central position of the land portion in a tire axial direction, or on a side of the first edge.

Abstract: A tire is disclosed, including a plurality of blocks, each has an outer surface bulging outward and two lateral walls. An extension line is defined on the surface of each flat segment of each block. Each extension line has a first point on the flat segment. A first horizontal reference line is defined by connecting two first points. A second horizontal reference line is defined on the outer surface with two ends thereof contacting the outer surface. The second horizontal reference line is 0.85 times as long as the first horizontal reference line. A vertical distance between the outer surface and the second horizontal reference line is 0.2-0.8 mm. Whereby, the tire could provide good drainage performance and adequate grip.

Abstract: By forming a ground contact edge side of lug grooves such that the groove depth becomes shallower in groove depth from the tire equatorial plane side toward the ground contact edge, and by setting an average angle of inclination formed between a tread face and a groove bottom to be not more than 5°, water expulsion is performed smoothly in the vicinity of the ground contact edge while securing the rigidity of land portions in the vicinity of the ground contact edge. This enables a high degree of both wet performance and dry performance to be achieved.

Abstract: In a tire 2, an outer surface 52 of a crown rib 48e and an outer surface 54 of a shoulder rib 48s form a part of a tread surface 28. On a cross-section of the tire 2 along a plane that includes a rotation axis of the tire 2, an outline of the outer surface 52 of the crown rib 48e is represented as a first arc. A center of a circle to which the first arc belongs is disposed on the equator plane. An outline of the outer surface 54 of the shoulder rib 48s is represented as a second arc. A ratio of a distance from a center of a chord of the second arc to the second arc relative to a length of the chord of the second arc is not less than 0.03 and not greater than 0.05.

Abstract: A pneumatic tire comprises a tread portion with a tread surface; four main grooves in the tread surface of the tread portion, extending in a tire circumferential direction; and a center land portion, middle land portions adjacent to the center land portion on either side in a tire lateral direction, and shoulder land portions outwardly adjacent to the middle land portions in the tire lateral direction formed by the main grooves. The main grooves have a wave-like shape with a constant groove width in the tire circumferential direction and with periodic oscillation.

Abstract: The present technology provides a pneumatic tire. In a tire meridian cross-sectional view, a profile line (PL1) of a center land portion (X) defined by two center main grooves (14a, 14b) protrudes outward in a tire radial direction further than a standard profile line (PL0). Profile lines (PL2, PL3) of sub-center land portions (Y1, Y2) and shoulder land portions (Z1, Z2) defined outward of the two center main grooves (14a, 14b) in the tire width direction protrude outward in the tire radial direction further than the standard profile line (PL0), the shoulder land portions (Z1, Z2) being defined further outward than the sub-center land portions (Y1, Y2). A pitch count (Po) of a vehicle mounting outer side region and a pitch count (Pi) of a vehicle mounting inner side region satisfy the relationship Po<Pi.

Abstract: Provided is a pneumatic tire which has both improved driving stability performance on a dry road surface and improved on-snow performance. A pneumatic tire has defined on the tread first lands and second lands. The first lands and the second lands are provided with recesses. The recesses include first recesses provided in first edges of the first lands, and also include second recesses provided in second edges of the second lands. The second recesses are provided so as not to intersect projection regions formed by projecting the first recesses onto the second edges in the axial direction of the tire.

Abstract: In a tire 2 according to the present invention, an outer surface 52 of a crown rib 48e and an outer surface 54 of a shoulder rib 48s form a part of a tread surface 28. On a cross-section of the tire 2 along a plane that includes a rotation axis of the tire 2, an outline of the outer surface 52 of the crown rib 48e is represented as a first arc. A center of a circle to which the first arc belongs is disposed on the equator plane. An outline of the outer surface 54 of the shoulder rib 48s is represented as a second arc. A ratio of a distance from a center of a chord of the second arc to the second arc relative to a length of the chord of the second arc is not less than 0.03 and not greater than 0.05.

Abstract: A two-wheeled vehicle tire includes a tread portion having a designated rotational direction and being provided with at least three kinds of blocks including first blocks each having a trailing edge extending substantially in parallel with a tire axial direction, second blocks each having a trailing edge inclined a first direction with respect to the tire axial direction and third blocks each having a trailing edge inclined in a second direction opposite to the first direction with respect to the tire axial direction. At least two different kinds of blocks selected from a group of the first blocks, the second blocks and the third blocks are provided on each of a crown region, middle regions and shoulder regions of a tread portion.

Abstract: The tread has four grooves that delimit a central, intermediate and edge regions. Each intermediate region is divided into elongated raised elements that delimit oblique grooves which open into the circumferential grooves and are inclined at an average angle of between 30 and 60 degrees relative to the circumferential direction. The raised elements have an average circumferential length of between 50 and 70 mm. The depth of the oblique grooves is at least 30% of the depth of the circumferential grooves. Each raised element has a plurality of sipes that open into the oblique grooves. Each raised element also has an internal and oblique cut that has a total depth at least equal to 75% of the thickness PMU to be worn away. The oblique cut has a wide part and a part that forms a sipe that extends by a channel that forms a new groove after wear.

Abstract: A tread includes a plurality of circumferential grooves. Each of the plurality extends continuously in a tire circumferential direction. The plurality of circumferential grooves defining a circumferentially extending main rib and a circumferentially extending curtain rib axially separated by a curtain groove. The curtain groove having an axial width between 4% and 40% of a minimum axial width of a main groove of the plurality of circumferential grooves. The main groove is disposed axially opposite the curtain groove and adjacent to the curtain rib.

Abstract: In a braking performance evaluation method including the steps of acquiring a tire ground contact pressure distribution, acquiring a sliding friction coefficient table, and calculating a friction force of an entire tire using a brush model having a function representing the tire ground contact pressure distribution and the sliding friction coefficient table, the step of acquiring the tire ground contact pressure distribution includes the step of acquiring a first ground contact pressure distribution on a road surface on which no water film is present via actual measurement or calculation and the step of acquiring a second ground contact pressure distribution by applying reduction in a ground contact pressure due to a water film intruded between the tire and the road surface to the first ground contact pressure distribution and using the second ground contact pressure distribution as the tire ground contact pressure distribution used for the calculating.

Abstract: A pneumatic tire includes a tread having crown grooves, shoulder grooves, middle lands, and shoulder lands. Each middle land has middle blocks and middle inclined lateral grooves such that the middle inclined lateral grooves are inclining relative to tire axial direction and connecting a crown groove and a shoulder groove, each shoulder land has shoulder blocks and shoulder inclined lateral grooves such that the shoulder inclined lateral grooves are inclining relative to the axial direction and connecting a shoulder groove and a tread edge, and each middle inclined lateral groove is positioned adjacent to a shoulder block such that each middle inclined lateral groove and the shoulder block are sandwiching the shoulder groove and overlapping in tire circumferential direction and have a ratio Lov/Lmg ranging from 0.7 to 1.0, where Lov represents tire circumferential overlapping length Lov, and Lmg represents tire circumferential length Lmg of the middle inclined lateral grooves.

Abstract: A tyre tread (1) having a sculptured external surface including see-through sipes (71, 72, 73) at an intermediate land region (4), wherein each of such sipes extends according to a straight line defining a low inclination angle (?, ?, ?) with respect to a tread width direction (W), such sipes being also surrounded by respective chamfered areas (81, 82, 83) (FIG. 1).

Abstract: A tire 1 comprises a tread portion 2 provided with an outboard shoulder land region 8 with outboard shoulder sipes 26. The outboard shoulder sipe 26 comprises a deep bottom part 27 and a shallow bottom part 28. The shallow bottom part 28 comprises an axially outer part 30 extending axially inwardly from the axially inner end 27i of the deep bottom part 27, an axially inner part 31 extending axially outwardly from the outboard shoulder main groove 4, and a middle part 32 connecting therebetween. The axially outer part 30, axially inner part 31 and middle part 32 have different angles with respect to the tire axial direction.

Abstract: A pneumatic tire comprises a tread portion provided with crown main grooves, center axial grooves and center blocks including a siped center block with a first sipe. The siped center block has a pair of substantially v-shaped opposite first and second block side walls each having an outwardly protruding vertex. The first sipe has a wavy configuration at least partially. One end of the first sipe is positioned on one side in the tire circumferential direction of the vertex of the first block side wall, whereas the other end of the first sipe is positioned on other side in the tire circumferential direction of the vertex of the second block side wall.

Abstract: The pneumatic tire of this disclosure includes on a tread surface four or five circumferential grooves, and includes a pair of shoulder land portions, a pair of intermediate land portions, and one or a pair of central land portions partitioned thereon, wherein: in a tread widthwise cross sectional view at an unloaded condition when the tire is mounted to an applicable rim and applied with a prescribed internal pressure, when drawing a virtual arc R1 protruding to a tire radial outer side, of which a center of curvature is located on a tire equatorial plain, across four tread widthwise edges adjacent to the circumferential grooves of outlines of the pair of intermediate land portions, a correlation among each protrusion amount t1, t2 and t3 of outlines of the central land portions, the intermediate land portions and the shoulder land portions from the virtual arc R1 satisfies: t1<t2, and t3<t2.

Abstract: 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.

Abstract: The present technology relates to a pneumatic tire in which the ratio of the total width SW and the outer diameter OD satisfies SW/OD?0.3, and grooves are provided on the tread portion. In the ground contact region of the tread portion, when the groove area ratio with respect to the ground contact area is GR, the ground contact width is W, the region having a width of 50% of the ground contact width W and the tire equatorial line as center is the center region, the groove area ratio in the center region is GCR, the ground contact region on the outer side in the tire width direction of the center region is the shoulder region, and the groove area ratio in the shoulder region is GSR, the ground contact region of the tread portion is formed to satisfy 10%?GR?25% and GCR?GSR.

Abstract: Various embodiments of a tire traction element are provided. In one embodiment, a tire traction element is oriented in a circumferential groove of a tire to provide improved snow and/or mud traction. In one embodiment, a tire for a vehicle is provided, comprising: a tread having a circumferential direction, the tread having at least one circumferential groove which extends in the circumferential direction, the at least one circumferential groove having a groove base, and at least one groove sidewall; a plurality of traction elements in the circumferential groove connected to the at least one groove sidewall and the groove base; wherein at least one of the traction elements has a plurality of indentations formed on a radially outermost edge between the base portion and the at least one sidewall portion; and wherein the radially outermost edge has an angle of inclination ? relative to the radial direction.

Abstract: A tread pattern of a pneumatic tire is provided with two outer circumferential main grooves, and at least one inner circumferential main groove provided between the outer circumferential main grooves. A tread profile line of a first land portion between the outer circumferential main grooves protrudes 1 mm or less with respect to a first arc shape formed so as to pass through edge ends on the respective inner sides of the outer circumferential main grooves and edge ends on both sides of the inner side circumferential main groove. Furthermore, a tread profile line of a second land portion on the outer side of the outer circumferential main grooves in a tire width direction protrudes 1 mm or less with respect to a second arc shape which passes through edge ends on the outer side of the outer circumferential main grooves.

Abstract: A tire (1) made of rubber material, comprising a tread (2), said tread having a tread surface (20) intended to come into contact with a road surface when the tire is being driven on, this tread surface having, in cross section, a certain curvature. The tread surface (20) comprises, over at least 80% of its surface, a texture (3) contrasting with the rest of the tire, this texture (3) having a plurality of elements that protrude from or are recessed into the tread surface (20), and each element extends perpendicularly (?=90°)to the tread surface (20) along the curvature of this tread surface (20).

Abstract: A pneumatic tire includes a tread portion provided with a land portion with a plurality of lateral grooves extending across the land portion. Each lateral groove includes a main portion with a width equal to or more than 2.0 mm and a sipe portion extending radially inwardly from a bottom of the main portion. The main portion includes a first wall located on a first side in a circumferential direction and a second wall located on a second side in the circumferential direction. The sipe portion includes a first sipe wall located on the first side and a second sipe wall located on the second side. The lateral grooves include a first lateral groove having the first wall being continuous to the first sipe wall smoothly and a second lateral groove having the second wall being continuous to the second sipe wall smoothly.

Abstract: A pneumatic tire is provided that has enhanced traction performance. A shoulder main body portion of a first shoulder block is formed with a step portion projecting out in a tire circumferential direction. A height of the step portion is set lower than a height of a tread face of the shoulder main body portion and higher than the height of a lug groove. The step portion extends from a tire equatorial plane side end portion of the shoulder main body portion, beyond a tire width direction ground contact edge, to a tire shoulder portion.

Abstract: A pneumatic tire 1 is provided in the tread portion 2 with crown blocks 21 each circumferentially divided into two block pieces 28, and shoulder blocks 9 each circumferentially partially divided into two block pieces 15. The block pieces 28 of the crown block 21 are a first block piece 28A having an axially outer crown chamfer 30 abutting on a shoulder main groove 3, and a second block piece 28B having no chamfer abutting on the shoulder main groove 3. The block pieces 15 of the shoulder block 9 are a first block piece 15A having an axially inner shoulder chamfer 16 abutting on the shoulder main groove 3, and a second block piece 15B having no chamfer abutting on the shoulder main groove 3. On both sides of the shoulder main groove 3, the axially inner shoulder chamfers 16 are partially circumferentially overlapped with the axially outer crown chamfers 30.

Abstract: A tread pattern on a pneumatic tire is provided in regions of two intermediate land portions and has circumferential shallow grooves extending in the tire circumferential direction. An orientation of a groove inclination inclined with respect to a first direction in the tire circumferential direction of lug grooves provided in a region of one intermediate land portion, is the same as an orientation of a groove inclination inclined with respect to a second direction opposite to of the first direction of the tire circumferential direction of lug grooves provided in a region of another intermediate land portion, and the lug grooves provided in the respective regions of the intermediate land portions are bent so that the groove inclination approaches the tire circumferential direction at positions of intersection with the circumferential shallow grooves.

Abstract: An object is to improve noise performance of a tire while enhancing movement performance thereof. At least one of the land portions (20) includes an outer wall surface (30) positioned on a vehicle outer side, an inner wall surface (31) positioned on a vehicle inner side, a tread surface (32) on an outer side in a tire radial direction, an outer edge (33) of the tread surface (32) in contact with the outer wall surface (30), and an inner edge (34) of the tread surface (32) in contact with the inner wall surface (31). The tread surface (32) is formed in a convex shape which is smoothly curved between the outer edge (33) and the inner edge (34) and which has a top portion (43) most protruded outward in the tire radial direction, in a cross section of the land portion (20) in a tire width direction.

Abstract: A pneumatic tire includes a pair of circumferential grooves, a plurality of lateral grooves, and longitudinal grooves communicating between the lateral grooves on the outsides, in a tire width direction, of the circumferential grooves. Each lateral groove includes a lateral groove first portion, a lateral groove second portion disposed further outward, in the tire width direction, than the lateral groove first portion, and a lateral groove step portion connecting the lateral groove first portion and lateral groove second portion.

Abstract: The contact patch of the center land portion partitioned by the center side main grooves protrudes outward in the tire radial direction from the overall standard profile line of the tread portion. The maximum protruding amount is not less than 1.0% and not more than 2.5% of the tire width direction dimension of the center land portion. The contact patch of the intermediate land portion partitioned by the center side main groove and the shoulder side main groove protrudes outward in the tire radial direction from the standard profile line. The maximum protruding amount is not less than 0.7% and not more than 2.0% of the tire width direction dimension of the intermediate land portion. The maximum protruding amount of the center land portion is greater than the maximum protruding amount of the intermediate land portion.

Abstract: A heavy duty pneumatic tire includes a tread portion including a plurality of blocks separated by a plurality of circumferentially extending main grooves and a plurality of lateral grooves. At least one of the blocks is provided with two axially extending sipes to divide the block into a first end portion, a second end portion and a middle portion between the first end portion and the second end portion. The first end portion includes a first projected portion that protrudes outwardly in a block-width direction from the middle portion so as to form a steplike side, and the second end portion includes a second projected portion that protrudes outwardly in an opposite block-width direction to the first projected portion from the middle portion so as to form a steplike side.

Abstract: A winter tire includes a tread portion with a designated rotational direction. The tread portion is provided with at least one central block on a tire equator. The central block includes a first tapered portion. The first tapered portion includes an axial width gradually decreasing toward the rotational direction and a leading edge extending along an axial direction of the tire. The first tapered portion is provided with a hole for installing a stud pin.