Abstract: A heavy duty pneumatic tire includes a crown circumferential groove, a shoulder circumferential groove, crown lateral grooves, and crown blocks. The crown circumferential groove includes crown first-side vertexes and crown second-side vertexes and thus zigzags. The shoulder circumferential groove includes shoulder inner-side vertexes and shoulder outer-side vertexes. The crown lateral grooves are disposed at two pitch intervals of a zigzag of the crown circumferential groove and connect between the crown first-side vertexes and the shoulder inner-side vertexes. The crown blocks have crown sub-grooves having a groove width less than a groove width of the crown lateral groove. The crown sub-groove includes at least two transverse grooves extending across the crown block.

Abstract: A pneumatic tire having a tread, wherein the ground contact surface of the tread is composed of at least two types of rubber compositions different in the thermal conductivity, and the following formulas (1) and (2) are satisfied: 1700?(Dt2×?/4)/Wt?2827.4??(1) [(V+1.5×107)/Wt]?2.88×105??(2) where Wt (mm) is the cross-sectional width and Dt (mm) is the outer diameter of the tire when installed on a standardized rim and inflated to an internal pressure of 250 kPa, and V (mm3) is the virtual volume of the space occupied by the tire.

Abstract: A tyre includes a tread portion including a tread surface which is provided with grooves. At least one of the grooves includes a widening-width portion at least partially. The widening-width portion includes a first groove portion extending inwardly in a tyre radial direction from the tread surface, and a second groove portion located inwardly in the tyre radial direction of the first groove portion and having a groove width greater than that of the first groove portion.

Abstract: A method of making a tire includes providing a first body ply having a first width and laying a second body ply above the first body ply. The second body ply has a second width less than the first width. The method also includes laying a third body ply above the second body ply. The third body ply has a third width greater than the first width. The method further includes laying a first bead at a first location above the third body ply, laying a second bead at a second location above the third body ply, laying a first stabilizer ply insert at a third location above the third body ply, and laying a second stabilizer ply insert at a fourth location above the third body ply. The third location is between the first location and the second location, and the fourth location is between the third location and the second location.

Abstract: Provided is a pneumatic tire that has reduced rolling resistance during high-speed running as well as excellent durability performance. This pneumatic tire comprises a sidewall and a clinch section in each of a pair of side sections. When the loss tangent of the sidewall is tan ?sw and the loss tangent of the clinch section is tan ?c when measured under the conditions of 70° C., a frequency of 10 Hz, an initial strain of 5%, and a dynamic strain rate of 1%, then (tan ?sw+tan ?c)?0.3 and |tan ?sw?tan ?c|?0.07. When the cross-sectional width of the tire is Wt (mm) and the external diameter is Dt (mm) when the pneumatic tire is installed on a standardized rim and internal pressure is set to 250 kPa, and if the volume of space occupied by the tire is a virtual volume V (mm3), then (formula 1) and (formula 2) are satisfied. 1700?(Dt2×?/4)/Wt?2827.4??(formula 1) [(V+1.5×107)/Wt]?2.88×105??(formula 2).

Abstract: Provided is a pneumatic tire for which rolling resistance at high speed running is sufficiently reduced and durability is sufficiently improved. The pneumatic tire has a side portion, a thickness S (mm) of a rubber layer radially outside a carcass on the side portion at the maximum tire width position is 3 mm or less, the loss tangent of the rubber layer measured under the conditions of 70° C., a frequency of 10 Hz, an initial distortion of 5%, and a dynamic distortion rate of 1% is 0.15 or less, and when the cross-sectional width of the tire is Wt (mm) and the outer diameter is Dt (mm) when installed on a regular rim and the internal pressure is 250 kPa, the volume of the space occupied by the tire is the virtual volume V (mm3), the following (formula 1) and (formula 2) are satisfied. 1700?(Dt2×?/4)/Wt?2827.4??(formula 1) [(V+1.5×107)/Wt]?2.

Abstract: A tire is equipped with a radiofrequency communication module with a carcass reinforcement comprising two carcass plies such that the communication module is positioned in the bead axially on the outside of and against the second carcass ply.

Abstract: A pneumatic tire comprises a tread; a bead region, a sidewall; a bead core; a first apex; an apex-extension; a carcass; a chafer and a second apex. The second apex is positioned between a rim flange protector and the first apex or the extension. The carcass includes a first ply turned-up around the bead core to form a first turnup portion extending along the first apex and the extension and terminating radially inwardly from the radially outward end of the extension. The carcass may include a second ply turned-up, between the bead core and the first ply, around the bead core to form a second turnup portion, the second turnup portion extending along the axially outer side of the first apex. Alternatively, the carcass may include a second ply parting from the first ply at the extension and extending along the extension and the turnup portion of the first ply.

Abstract: A pneumatic tire comprises: a tread portion having a ground contacting surface; a sidewall portions having an outer surface; a bead portions; a carcass extending between the bead portions; and an inner rubber extending between bead portions. The inner rubber comprises a first portion extending through the tread portion with a first thickness t1, and a second portion extending through the sidewall portion with a second thickness t2. The first thickness t1 is more than the second thickness t2. In a meridian cross section of the tire under its normal state, when a first reference point (Pb1), a second reference point (Pb2), a shoulder reference point (Ps), a reference line segment (Lb), and a shoulder line segment (Ls) are defined, then a length (L1) of the shoulder line segment (Ls) is 85.9% to 89.3% of a length (L2) of the reference line segment (Lb).

Abstract: A motorcycle tire comprises a tread reinforcement including a jointless band ply. The jointless band ply has a developed width Wa of not more than 65% of the developed tread width TWe. The tread portion has a tread profile comprising a crown arc portion having a radius R1 of curvature and a pair of shoulder arc portions having a radius R2 of curvature. The radius R1 is smaller than the radius R2 and smaller than 50% of the maximum tire cross-section width Wt. In a normal state of the tire, the axial ends of the crown arc portion are respectively positioned axially inward of the outer edges of the jointless band ply.

Abstract: A tire includes tread having at least one ring-shaped steel belt extending in a circumferential direction of the tire, and a pair of beads having bead filler extending to an outer side of a tire-radial direction of the bead core, in which an electronic component is embedded in a region between a tire-radial direction outside end of the bead filler and a tire-width direction outside end of the steel belt.

Abstract: A pneumatic tire having a leak resistant bladder. The tire having an outer wall surface and an inner wall surface. The tire having an expandable first sidewall and an expandable second sidewall. A tread portion is located on at least a portion of the outer wall surface of the tire. A first bead having a first bead wire is connected to a first sidewall of the tire. A second bead having a second bead wire is connected to a second sidewall of the tire. The first bead and the second bead are connected to a rim. The tire has an internal expandable bladder configured to retain compressed gas. A barrier element is located between the inner wall surface of the tire and a substance layer. The substance layer is located between an inner wall surface of the barrier element and an outer wall surface of the internal expandable bladder.

Abstract: The tire includes a summit surrounded by side portions terminating in beads provided to cooperate with a mounting rim. A carcass reinforcement is surmounted by a summit reinforcement composed of reinforcing plies. When the tire is mounted onto its standard mounting rim and inflated with its nominal pressure, each side portion has an upper side point, a bottom side point, an intermediate side point, an upper side portion, and a bottom side portion. A weight of the bottom side portion on one side portion is at least 15% lighter than a weight of the bottom side portion on another side portion.

Abstract: In a pneumatic tire, a two-dimensional code is provided on a surface of side rubber provided in a side portion. The two-dimensional code is formed of a dot pattern including two types of gray scale elements identifiably formed using surface irregularities. A two-dimensional code range in a tire radial direction in which the two-dimensional code is provided lies outward or inward of a bead filler rubber edge located outward of bead filler rubber in the tire radial direction.

Abstract: A tire includes a tread, a pair of sidewalls, a pair of beads, and a carcass. Each bead includes a core and an apex. In the tire in the normal state, a ratio (HA/HS) of a distance HA in a radial direction from a bead base line to an outer end PA of the apex to a tire cross-sectional height HS may not be less than 20% and/or may not be greater than 30%, and an angle of a line segment connecting between the outer end PA of the apex and a center PM of a width, in an axial direction, of a contact surface of the apex at which the apex is in contact with the core, relative to the bead base line, may not be less than 45° and/or may not be greater than 55°.

Abstract: In a pneumatic tire, a bead filler is radially outward of a bead core, a carcass turned up end is radially inward of an outer side end of the bead filler, the turned up end is spaced from a carcass body, a reinforcement layer is laterally outward of the bead filler, a sidewall rubber extends from a sidewall to the bead, an inner rubber reinforcing layer is between the bead filler and the reinforcement layer and adjacent to the turned up end, a crack suppression layer is between the reinforcement layer and the sidewall rubber, the crack suppression layer extends 5 mm or more from where the crack suppression layer overlaps, the reinforcement layer contacts the carcass body radially outwardly of the bead filler, and a 100% modulus KcM100 of the crack suppression layer is at least 1.5 times that of the sidewall rubber.

Abstract: It is described a motorcycle tyre (100) intended to be fitted to a wheel of a motorcycle of the “supersport” segment, comprising an equatorial plane and a tread band extending in axial direction with a given axial development, wherein the tread band comprises a first annular portion made of a first elastomeric material, having a first dynamic shear storage modulus measured at 70° C., and at least one second annular portion made of a second elastomeric material, having a second dynamic shear storage modulus measured at 70° C., different form said first dynamic shear storage modulus measured at 70° C.

Abstract: A tire includes: circumferential grooves along a circumferential direction of a tire; lateral grooves along the circumferential direction, each lateral groove having one end opened to a side of the tire and the other end communicated with the circumferential groove; and narrow grooves in blocks defined by the circumferential and lateral grooves, each narrow groove having one end opened to the side of the tire and the other end communicated with the circumferential groove. The tire includes a surface that projects, at a position more to one side or the other in the circumferential direction than the narrow groove that is opened to the tire side, further to an outer side in a tire width direction than a tire side shape to which the narrow groove is opened, and the surface extends in a radial direction from a ground contact end to include a groove bottom of the narrow groove.

Abstract: The bead portion of the pneumatic tire includes a bead structure having a bead core composed of a bead cord, and an annular plate which extends to the tire circumferential direction and is formed of a resin material. The annular plate has a planar first annular ring portion extending to the tire circumferential direction and a second annular ring portion positioned outside the tire radial direction of the first annular portion and extending to the tire circumferential direction, the first annular portion is provided along the bead structure, and the second annular portion is further inclined to the outside in tire width direction of the first annular portion.

Abstract: A pneumatic tire including: a tread portion is in contact with a road surface; and a side wall portion is continuous to the tread portion and positioned inside a tire radial direction of the tread portion. A large region including a plurality of small regions having different arithmetic average roughness outside in a tire width direction is formed on outer surface of the side wall portion. A plurality of large regions are formed along a tire circumferential direction and the tire radial direction. In a boundary line of adjacent large region, small regions having different arithmetic average roughness come into contact with each other.