Abstract: A heavy-duty pneumatic tire includes a carcass ply including a main portion extending between bead cores and a pair of turn-up portions, a first reinforcing layer of a steel cord disposed in each bead portion in a U-shaped manner, and a second reinforcing layer of an organic fiber cord disposed in each bead portion and at least a part of the second reinforcing layer extending in a radial direction of the tire at an axially outward location of the first reinforcing layer. The second reinforcing layer includes an axially inner second ply and an outer second ply. The outer second ply has an inner end positioned below the bead core. The inner second ply has an inner end located axially inward of the inner end of the outer second ply, and has a substantially same length as the outer second ply in a tire cross-section.

Abstract: A tire with a built-in puncture sealant comprising a supporting tire carcass comprised of one or more layers of ply, an outer circumferential tread, and a radially inner layer, a pair of beads, sidewalls extending radially inward from the axial outer edges of the tread portion to join the respective beads, a sealant comprising a butyl ionomer containing degradation product, disposed inwardly from said tire carcass inner layer, wherein said sealant provides self-sealing properties to the tire.

Abstract: A tire for displaying at least one indicium includes a label affixed to the tire at a mounting location. The label has a first side facing away from the tire and a second side connected to the tire. The label's first side is configured to receive at least one adhesive appliqué having at least one indicium. The mounting location is a location on a sidewall of the tire where the label undergoes a strain equal to or less than a threshold strain under pre-defined conditions.

Abstract: A pneumatic tire manufacturing method is provided in which winding collapse is prevented, there is no possibility of adverse effects on the FV, a current-carrying layer can be formed easily, and down-stitching can be dispensed with or minimized in the manufacture of SOT-structure pneumatic tires having a base-pen structure in the tread.

Abstract: A pneumatic tire manufacturing method is provided in which raw cover molding is suitably performed with no, or a minimal amount of, down-stitching in the manufacture of SOT-structure pneumatic tires; also provided is a pneumatic tire. This pneumatic tire manufacturing method involves a first cover molding step for molding a first cover having a sidewall, an inner lining, a ply, beads and a tread-side edge, a tread ring forming step for forming a tread ring having a breaker, a band and a tread center part, a shaping step for pressure-bonding the tread ring and the first cover to mold this to the shape of the raw cover, and a turn-up step for bonding the side wall to the lateral surface of the first cover, wherein the tread-side edge is formed in a position adjacent to the end of the tread center portion in the shaping step, and in the turn-up step, the tread-side edge and the tread center part are bonded together.

Abstract: A pneumatic tire manufacturing method is provided in which raw cover molding is suitably performed with no, or a minimal amount of, down-stitching in the manufacture of SOT-structure pneumatic tires; also provided is a pneumatic tire. This pneumatic tire manufacturing method involves: a step in which a sidewall, an inner liner, and a ply are bonded on a first molding drum, a pair of beads is set, and the tread side part is formed on the side wall, forming a first cover; a step in which a breaker and band are bonded on a second molding drum and the tread center part is formed on the band, shaping the tread ring; a step in which the first cover is inserted inside of the tread ring and the first cover is inflated, bonding the tread ring and the first cover with pressure; and a step in which the sidewall is folded back towards the lateral surface of the inflated first cover and bonded to the lateral surface of the first cover, and the tread side part and the tread center part are bonded together.

Abstract: A pneumatic tire includes a narrow groove on a tread surface, inclined from the tire circumferential direction, groove width being smaller than groove depth, and an air inflow part opening to the tread surface and formed on one of the opposing groove walls. At least one end of the narrow groove is a terminal end. The air inflow part is disposed at the terminal end of the narrow groove, and in a development plan view of the tread surface, ?XOY is an acute angle, where O is an intersection between a widthwise center line of the air inflow part and a groove widthwise center line of the narrow groove, X is a terminal endpoint of the air inflow part along the widthwise center line of the air inflow part, and Y is a lengthwise center point of the narrow groove along the groove widthwise center line.

Abstract: Provided is a tire in which, by improving a decorative portion provided on a side portion, while a high visibility and a crack resistance are secured, molding man-hours are reduced, thereby improving a moldability and a cost performance.

Abstract: A pneumatic tire comprises a carcass formed of a carcass ply extending between a pair of bead portions in a toroidal shape, and a bead core disposed in a respective one of the bead portions, the bead core comprising an axially inner core and an axially outer core respectively disposed on an axially inner side and the axially outer side of the carcass ply. The bead portion comprises an inner bead apex rubber extending radially outward from the inner core, and an outer bead apex rubber extending radially outward from the outer core. An outer apex height Ho from a bead base line to a outer end of the outer bead apex rubber is in a range of from 120% to 150% of an inner apex height Hi from the bead base line to the outer end of the inner bead apex rubber.

Abstract: A motorcycle pneumatic tire includes a tread portion including a crown region, a pair of middle regions and a pair of shoulder regions upon a tread development width of the tread portion being divided equally into five regions. The tread portion is provided with a pair of circumferentially and continuously extending crown main grooves within the crown region to include a tire equator therebetween and a plurality of inclined grooves each extending from the crown region to the shoulder region in each side of the tire equator without communicating with the crown main grooves. Each of the inclined grooves includes a straight portion extending straightly in the middle region and an arc portion extending in an arc shape in the shoulder region while increasing an angle with respect to a circumferential direction of the tire axially outwardly.

Abstract: The pneumatic tire according to the present technology includes a tread portion, sidewall portions, and bead portions, and has a designated mounting direction on a vehicle. The pneumatic tire is provided, in the tread portion, with four main grooves including a pair of center main grooves extending in the tire circumferential direction and a pair of shoulder main grooves located outside the center main grooves and extending in the tire circumferential direction; these main grooves define five rows of land portions; the center main groove on the vehicle outer side has a zigzag shape in the tire circumferential direction; and a plurality of lug grooves extending from the main grooves, except the center main groove having a zigzag shape, toward both sides in the tire lateral direction and terminating in the land portions are provided in the tread portion.

Abstract: In a pneumatic tire, a sidewall portion includes a plurality of projecting portions projecting in a tire width-direction. The projecting portions are placed such that at least portions of the projecting portions are superposed on one of a plurality of blocks in a tire radial-direction as viewed from a tire width-direction. At least one of the plurality of projecting portions includes at least one opening. A total sum of an opening area of the opening is equal to or smaller than an actual area of the projecting portion in the at least one of the projecting portions.

Abstract: A winter tire includes a tread portion with a ground contact surface. The ground contact surface of the tread portion is provided with a recess. The recess is provided with a hole for fixing a stud pin and at least one projection extending radially outwardly and arranged at a location apart from the hole.

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 pneumatic tire, comprising: a carcass provided in a toroidal shape across a pair of bead cores; a bead filler provided on the outer side in the tire radial direction of each bead core; and a rim guard to protrude on the outer side in the tire width direction for rim protection, wherein a contour of a portion of the rim guard has radius of curvature in the range of 5 mm to 40 mm in a widthwise cross section of the tire, and provided that “1CSH” represents a distance in the tire radial direction between the innermost end and the outermost end of the carcass, a distance in the tire radial direction between the outermost end in the tire width direction of the rim guard and the outermost end in the tire radial direction of a bead filler is in the range of ?0.2CSH to 0.05CSH.

Abstract: This heavy duty pneumatic tire includes a block (6) on a tread surface (1). Shallow grooves are provided in the block. At least one of the shallow grooves (7, 9, 31, 32) is a raised bottom shallow groove that is in communication with at least one groove among circumferential grooves and transverse grooves adjacent to the block, extends in a direction intersecting the tire circumferential direction at least in a central portion of the block in the tire width direction, and has a groove depth that is shallower in the central portion of the block in the tire width direction than at an end of the raised bottom shallow groove in the tire width direction, thereby increasing block rigidity while achieving good mud drainage.

Abstract: The pneumatic tire includes a carcass layer, a belt layer disposed outward of the carcass layer in the tire radial direction, and a tread rubber disposed outward of the belt layer in the tire radial direction. Moreover, the belt layer is formed by laminating a pair of cross belts having a belt angle with an absolute value from 10° to 45° both inclusive and mutually opposite signs, and the circumferential reinforcing layer having a belt angle within a range of ±5° relative to the tire circumferential direction. Moreover, the distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10?Gsh/Gcc.

Abstract: A tire with a built-in puncture sealant comprising a supporting tire carcass comprised of one or more layers of ply, an outer circumferential tread, and a radially inner layer, a pair of beads, sidewalls extending radially inward from the axial outer edges of the tread portion to join the respective beads, a sealant comprising an outer layer of sealant and an inner layer of sealant, disposed inwardly from said tire carcass inner layer, wherein the outer layer of sealant and the inner layer of sealant have different viscosities, and wherein said sealant provides self-sealing properties to the tire.

Abstract: A stud pin includes a buried base portion embedded in a tread portion of a pneumatic tire and a tip portion protruding from the road contact surface of the tread portion when the buried base portion is embedded in the tread portion. A tip surface of the tip portion includes: a first protrusion portion and a second protrusion portion longer in the tire width direction than in the tire circumferential direction and protruding toward one side in the tire circumferential direction; a first recessed portion disposed between the first and second protrusion portions and recessed toward the other side in the tire circumferential direction; a third protrusion portion and a fourth protrusion portion protruding toward the other side in the tire circumferential direction; and a second recessed portion disposed between the third and fourth protrusion portions and recessed toward the one side in the tire circumferential direction.

Abstract: In a pneumatic tire, a tread rubber includes a recessed portion extending along a tire-circumferential direction, the recessed portion being placed at a position of a tire-outer surface superposed on an end of the belt portion or at a position of a tire-outer surface on an outer side in a tire-width direction than the former position of the tire-outer surface, an outer wound-up portion is placed closer to a belt portion than an inner wound-up portion, the outer wound-up portion is separated from the belt portion to prevent the outer wound-up portion from being superposed on the belt portion, and the outer wound-up portion is superposed on the recessed portion.