Abstract: A stud pin includes a tip including an end surface that comes into contact with a road surface, a body portion that supports the tip; and a lower flange connected to the body portion at an end on an opposite side to the end surface. A profile shape of the lower flange is an anisotropic shape in which, of imaginary rectangles circumscribing the profile shape, a first smallest rectangle with the shortest side of its four sides being the shortest and/or a second smallest rectangle with the longest side of its four sides being the shortest includes short sides and long sides of different lengths. The profile shape includes four or more first protrusion portions that project in the longitudinal direction parallel with the long sides and two second protrusion portions that project in the lateral direction parallel with the short sides.

Abstract: A tire comprises a tread portion comprising at least one circumferentially continuously extending main groove, and a land portion divided by the above-said at least one main groove, wherein the land portion is provided with straight sipes and curved sipes each extending in the tire axial direction.

Abstract: A pneumatic tire in which a plurality of sipes 20 are formed in land sections of a tread and at least one of end parts in an extending direction of each sipe 20 is an end part 21 in the land section that is blocked in the land section, in which holes 22 separated from the sipes 20 are formed on line segments L connecting the end parts 21 in the land section of adjacent two sipes 20 to each other, and the hole 22 has a circular shape or an elliptical shape in plan view, a diameter of which becomes smaller as coming toward a deeper position.

Abstract: 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.

Abstract: In a pneumatic tire, a lug groove is configured so that a portion thereof defining a leading side of a block in a rotation direction is inclined toward a trailing side in the rotation direction as that portion extends outward in a lateral direction from an equator line side. Among small blocks defined in the block by narrow grooves, a small block adjacent to the lug groove defining the leading side of the block in a rotation direction, and to a circumferential main groove defining the equator line side is a leading-side block, and a small block with a portion positioned on a backmost side of the block in the rotation direction is a trailing-side block. Among the small blocks, the trailing-side block has a greater surface area than that of the leading-side block, and intermediate blocks each have a greater surface area than the trailing-side block.

Abstract: A pneumatic tire includes a lateral groove that includes a groove bottom surface extending in a direction crossing a tire circumferential direction, and a protrusion provided on the groove bottom surface and extending in an extension direction of the groove bottom surface. The protrusion includes a main body, and an end portion provided on at least one side in a longitudinal direction of the main body and shaped such that a height of the protrusion from the groove bottom surface decreases from an inside to an outside in the longitudinal direction of the main body. The end portion includes an upper surface that forms a circular arc recessed inward in a tire radial direction in a cross section crossing a width direction of the protrusion.

Abstract: A motorcycle tyre for traveling on rough terrain, the tyre includes a tread portion provided with blocks. The at least one of the blocks includes a ground contact surface having a pair of lateral edges extending in a tyre axial direction. The at least one of the blocks is provided with a pair of lateral narrow grooves extending in the tyre axial direction on the ground contact surface to form a pair of edge-side portions defined between the pair of lateral narrow grooves and the pair of lateral edges. The at least one of the pair of edge-side portions includes a neck portion having a minimum circumferential length thereof, wherein a circumferential length of the at least one of the pair of edge-side portions increases toward axially both sides from the neck portion.

Abstract: A tread for a tire includes: a first tread zone extending circumferentially, continuously, and entirely around the tire, the first tread zone being formed of a first compound; a second tread zone extending circumferentially, continuously, and entirely around the tire, the second tread zone being formed of a second compound different from the first compound; and a boundary groove axially separating the first tread zone from the second tread zone, the first tread zone, the second tread zone, and the boundary groove entirely forming the tread, the boundary groove having an axial centerline disposed an axial distance from an equatorial plane of the tire. The first tread zone has a first circumferential groove and a sidewall portion defining an intermediate circumferential rib of the first tread zone and a shoulder circumferential rib of the first tread zone.

Abstract: In the pneumatic tire, at least one main groove is formed in each tread portion on either side of the tire equator to form plural land portions, a microgroove that extends in the width direction and closes at a time of grounding, and a crossing microgroove that crosses the microgroove and closes at the time of grounding are formed in at least one of the land portions, such that block groups, each consisting of plural blocks aligned along the microgroove, are arranged in at least one of the land portions repeatedly in the circumferential direction, and widthwise sidewalls of blocks in a block group arranged adjacent to each other in the circumferential direction are displaced from each other along the microgroove by a distance L corresponding to from ? to ½ of the arrangement pitch P of the blocks.

Abstract: A pneumatic tire includes alternating first and second groove portions. The first groove portion intersects an equator and extends in a width direction. The second groove portion inclines from the first groove portion to a tread edge at a smaller angle relative to a circumferential direction than an angle of the first groove portion relative to the circumferential direction. The first groove portion communicates with the second groove portion of the lug groove adjacent in the circumferential direction. The first groove portion is on a stepping side of each lug groove. The second groove portions are curved or bent and an average angle of the second groove portions in an inner region is smaller than in an outer region. Shallow grooves having a bent point are formed on blocks. The blocks are defined by circumferential narrow grooves connecting the second groove portions adjacent in the circumferential direction and the lug grooves.

Abstract: 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.

Abstract: A tire having a tread portion. The tread portion includes a first shoulder land portion that is defined between a first shoulder main groove and a first tread end. The first shoulder land portion includes: a shoulder lateral groove that extends from the first tread end and ends in the first shoulder land portion; a first sipe that extends from an end of the shoulder lateral groove to the first shoulder main groove; and a second sipe that extends from the first tread end toward the first shoulder main groove, and ends in the first shoulder land portion. A length of the shoulder lateral groove in a tire axial direction is 0.10 to 0.30 times a width of the first shoulder land portion in the tire axial direction.

Abstract: A tire has, on a tread surface of the tire, five land portions, an installation direction of the tire to a vehicle is designated, intermediate land portions respectively have a communicating sipe 40, the communicating sipe is constituted by a first sipe 41 at a vehicle-installed outside and a second sipe 42 at a vehicle-installed inside, the first sipe and the second sipe have an intersection point P on the vehicle-installed outside of a center line in a tire width direction of the corresponding intermediate land portion, the distance between the intersection point and a land portion edge at the vehicle-installed inside is the largest in an innermost intermediate land portion of the intermediate land portions, and an angle ?1 of the first sipe to a tire circumferential direction is larger than an angle ?2 of the second sipe to the tire circumferential direction.

Abstract: A tire comprises a tread portion having at least one main groove extending in a zigzag manner in a tire circumferential direction. The main groove includes first inclined portions and second inclined portions arranged alternately in the tire circumferential direction. The first inclined portions are inclined in a first direction and the second inclined portions are inclined in a second direction opposite to the first direction with respect to the tire circumferential direction. A length of each of the first inclined portions is larger than a length of each of the second inclined portions. The main groove is provided in a groove bottom thereof with projecting portions extending in a groove width direction of the main groove. The projecting portions includes first projecting portions arranged in the first inclined portions.

Abstract: A pneumatic tire, includes: an annular-shape tread portion; a sidewall portions; and bead portions. JIS hardness of tread rubber is within a range of 40 to 60 and snow traction index is 180 or higher. A rib positioned between circumferential grooves is demarcated in a center region of the tread portion. Closed grooves are formed in the rib. The closed grooves are inclined with regard to a tire axial direction such that a closed end faces a leading side. A groove wall of the closed groove on the leading side protrudes more outward in the tire axial direction than a groove wall on a trailing side. A difference between angles ?1 and ?2 of the groove walls on the leading and trailing sides of the closed grooves, respectively, with regard to the tire axial direction is within a range of 0°??1-?2?5°.

Abstract: A pneumatic tire is provided in which each of sipes has a leading-side edge and a trailing-side edge. A chamfered portion that is shorter than a sipe length of the sipe is formed on each of the leading-side edge and the trailing-side edge. The sipe includes, at sections facing the chamfered portions, non-chamfered regions in which other chamfered portions are not present. Both end portions of the sipe are terminated inside a rib. A maximum depth x (mm) of the sipe 11 and a maximum depth y (mm) of the chamfered portion 12 satisfy a relationship x×0.1?y?x×0.3+1.0. A sipe width of the sipe is constant in a region between an end portion of the chamfered portion positioned on an inner side in the tire radial direction and a groove bottom of the sipe.

Abstract: To provide a pneumatic tire capable of improving rut performance. A pneumatic tire according to an embodiment is a tire having a specified rotation direction. A shoulder region of a tread portion is provided with a shoulder block and a raised portion is provided in an outer extension portion of the shoulder block in a tire width direction in relation to a tire ground contact end. The raised portion includes a corner portion which protrudes from an edge portion of the shoulder block on a front side in the rotation direction toward the front side in the rotation direction.

Abstract: A pneumatic tire comprises an inner circumferential groove and an outer circumferential groove in a tread portion and extending in a tire circumferential direction. A land portion between circumferential grooves is defined by the inner and outer circumferential grooves. The pneumatic tire includes first and second auxiliary grooves disposed in the tire circumferential direction that communicate with the inner and outer circumferential grooves, respectively, and terminate within the land portion between circumferential grooves. The first auxiliary grooves and the second auxiliary grooves have a non-intersecting, alternating arrangement. At least one narrow groove is disposed between adjacent first auxiliary grooves. At least two narrow grooves are disposed between adjacent second auxiliary grooves. The at least two narrow grooves between second auxiliary grooves are disposed in a greater number than the number of the at least one narrow groove between first auxiliary grooves.

Abstract: A pneumatic tire includes first and second main grooves, and first sipes and auxiliary grooves on second land portions between the first and second main grooves, the auxiliary grooves opening to the second main grooves and terminating in the second land portions. The auxiliary grooves bend at a bend point and include a first portion extending from an opening end to the bend point, and a second portion extending from the bend point to a terminating end. A groove width of the first portion gradually reduces from the opening end to the bend point. Second sipes have an end that opens to each of the second main grooves and another end that opens to each of the terminating ends. Third sipes have an end that opens to the first main grooves and another end that opens to the first portions. The sipes are parallel to each other.

Abstract: A tread surface of a pneumatic tire is configured so that, given an inner region inward from shoulder circumferential main grooves in a tire lateral direction, and outer regions outward from the shoulder circumferential main grooves in the tire lateral direction, blocks positioned in the inner region are defined into three or more small blocks by narrow grooves, and blocks positioned in the outer regions are defined into a number of small blocks by the narrow grooves, the number being at least one less than the number of small blocks defined in the blocks positioned in the inner region. The small blocks including frontmost portions of the blocks in a tire rotation direction are leading-side blocks, and the small blocks including backmost portions of the blocks in the tire rotation direction are trailing-side blocks. The leading-side blocks have a surface area that is less than that of the trailing-side blocks.