Abstract: A tire management system (100) includes: an acquisition processing portion (62) that acquires state information regarding a state of a pneumatic tire (11) attached to a vehicle (1); a detection processing portion (63) that detects an abnormality of the pneumatic tire (11) based on the state information acquired by the acquisition processing portion (62); and a first output processing portion (64) that, when the detection processing portion (63) has detected the abnormality, outputs first route information to a display portion of a vehicle-mounted communication apparatus (13) of the vehicle (1), wherein the first route information includes a first route that is a route to, among a plurality of predetermined stop spots, a specific stop spot that has a stop space corresponding to a size of the vehicle (1).

Abstract: A tire management system (100) includes: a first communication apparatus (2) that acquires state information regarding a state of a tire (11) that is transmitted from an air pressure detection device (12) provided in a vehicle (1) when the vehicle (1) is located in a communication range of a predetermined wireless communication standard; and a management server (4) including a storage processing portion (70) that stores, into a storage portion (43), the state information acquired by the first communication apparatus (2).

Abstract: Provided is a motorcycle tire, that provides excellent steering stability while using steel cords as a belt layer material, which comprises a carcass extending from a tread portion to a bead core of a bead portion via a sidewall portion, and a belt layer arranged outside the carcass and inside the tread portion in the tire radial direction, wherein the belt layer is a steel belt layer having steel cords; the steel cord is a steel cord having an m×n configuration in which n strands, formed by twisting m steel filaments, are twisted together in the same direction as the steel filaments, and the m is 1 or more and 3 or less and n is 2 or more and 6 or less; the diameter of the steel filament is 0.15 mm or more and 0.25 mm or less; the rubber composition forming the tread portion is a rubber composition having a complex elastic modulus E* (MPa) of 5.

Abstract: A motorcycle tire includes a tread portion, sidewall portions, bead portions each with a bead core therein, a carcass, and a tread reinforcing layer arranged radially outwardly of the carcass and includes a belt layer and a band layer. The belt layer includes an inner belt ply and an outer belt ply. The band layer includes a band ply arranged between the inner and outer belt plies. The inner belt ply includes belt cords oriented at an angle greater than 5 degrees to the tire circumferential direction and a first development width. The outer belt ply includes belt cords oriented at an angle greater than 5 degrees to the tire circumferential direction and a second development width. The band ply includes band cords oriented at an angle not more than 5 degrees to the tire circumferential direction. The second development width is greater than the first development width.

Abstract: A contour CL of a carcass 12 includes a curved portion 44 and an inversely curved portion 46. A boundary between the curved portion 44 and the inversely curved portion 46 is an inflection point PV. A part or an entirety of the curved portion 44 is represented by a first arc. A part or an entirety of the inversely curved portion 46 is represented by a second arc. The first arc and the second arc are tangent to each other at the inflection point PV. A ratio (X/W) of a distance X in an axial direction to a distance W in the axial direction is not less than 70% and not greater than 85%. A ratio (Y/H) of a distance Y in a radial direction to a distance H in the radial direction is not less than 15% and not greater than 22%.

Abstract: A pneumatic tire is provided which has sufficiently reduced rolling resistance during high-speed running and which has excellent durability. The pneumatic tire has a bead portion, carcass and tread, wherein: a bead-reinforcing layer that reinforces the bead portion from outside of the carcass is provided outside of the carcass in the tire axis direction; and the pneumatic tire satisfies (formula 1) and (formula 2) below, where Wt (mm) is the cross-sectional width of the tire when the tire installed on a standardized rim and the internal pressure is 250 kPa, Dt (mm) is the outer diameter, and the virtual volume V (mm3) is the volume of the space occupied by the tire. 1600?(Dt2×?/4)/Wt?2827.4??(formula 1) [(V+1.5×107)/Wt]?2.

Abstract: An object of the present disclosure is to provide a golf ball having an increased spin rate when being hit with an 8-iron while suppressing rise in a spin rate when being hit with a driver. The present disclosure provides a golf ball comprising a spherical core having an inner core and an outer core, and a cover positioned outside the spherical core, wherein A×a is 12,200 or less and B×b is 20,400 or more, where “a” represents an average hardness (Shore C) of a hardness (H2.5) at a point of 2.5 mm from a center of the spherical core and a hardness (H5) at a point of 5 mm from the center of the spherical core, “b” represents an average hardness (Shore C) of a hardness (H7.5) at a point of 7.

Abstract: A motorcycle tire has a tread portion. The tread portion has a ground contact surface curved in an arc shape convex outward in a tire radial direction. The ground contact surface includes a central region and a first outer region. The ground contact surface has oblique grooves each including a portion inclined with respect to a tire circumferential direction. Each of the oblique grooves extends across the central region and the first outer region. Each of the oblique grooves includes a vertical groove portion extending at an angle ? of 20 degrees or less with respect to the tire circumferential direction. A minimum distance in a tire axial direction along the ground contact surface between the vertical groove portion and an outer edge of the central region is 30% or less of a maximum width in the tire axial direction of the central region along the ground contact surface.

Abstract: Provided is a pneumatic tire with which any change in steering stability between low-speed running and high-speed running is sufficiently minimized, and durability is also sufficiently improved. This pneumatic tire has a belt layer radially inward of the tread portion, wherein the ratio (tan ?/E*) of the loss tangent (tan ?) to the complex elastic modulus E*(MPa) of the rubber composition constituting the belt layer, as measured under the conditions of 70° C., frequency 10 Hz, initial distortion 5%, and dynamic distortion rate 1%, is 0.002 to 0.017 (inclusive), and the (formula 1) and (formula 2) are satisfied, where Wt (mm) is the cross-sectional width of the tire, Dt (mm) is the outside diameter, and the virtual volume V (mm3) is the volume of the space occupied by the tire, when the tire is installed on a standardized rim and the internal pressure is 250 kPa. 1700?(Dt2×?/4)/Wt?2827.4??(formula 1) [(V+1.5×107)/Wt]?2.

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 tire having a tread composed of a rubber composition that includes a rubber component, wherein the tread has at least one circumferential main groove extending continuously in a tire circumferential direction, wherein, at a bending part in a plurality, the circumferential main groove bends and extends in the tire circumferential direction such that a center line of the circumferential main groove deviates in a tire width direction or an extending direction of the center line of the circumferential main groove changes preceding and following the bending part, and wherein the rubber composition has tan ? at 20° C. (20° C. tan ?) of 0.30 or less, and breaking strength TB (MPa) at 175° C. and elongation at break EB (%) at 175° C. satisfying a relational expression of TB x EB/2 ? 600.

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: A tire has a tread portion including a first shoulder land region. The first shoulder land region is provided with first shoulder sipes. Each of the first shoulder sipes is provided with a chamfered portion over an entire lengthwise range from a first longitudinal edge to a first tread edge. Each of the chamfered portions includes a first chamfered portion defined between a shoulder center position and the first longitudinal edge and a second chamfered portion defined between the shoulder center position and the first tread edge. The second chamfered portion has a chamfer volume larger than a chamfer volume of the first chamfered portion.

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 pneumatic tire comprises a bead portion including a reinforcing rubber portion disposed adjacently to an axially outer side of a carcass ply. The reinforcing rubber portion includes an inner rubber layer and an outer rubber layer. The radially outer end of the outer rubber layer is positioned radially outside the radially outer end of the inner rubber layer.

Abstract: A tire has a tread portion including a first shoulder land region. The first shoulder land region is provided with first shoulder sipes. Each of the first shoulder sipes is provided with a chamfered portion over an entire lengthwise range from a first longitudinal edge to a first tread edge. Each of the chamfered portions includes a first chamfered portion defined between a shoulder center position and the first longitudinal edge and a second chamfered portion defined between the shoulder center position and the first tread edge. The second chamfered portion has a chamfer volume smaller than a chamfer volume of the first chamfered portion.

Abstract: A tread portion 2 of a tire 1 includes a plurality of shoulder blocks 11 and a plurality of middle blocks 12. An inner edge 11B in the tire axial direction of a tread surface of each shoulder block 11 protrudes on an outer side in a tire radial direction with respect to a virtual profile 18. A side surface S on the inner side in the tire axial direction of each shoulder block 11 includes one first side surface S1 extending from the inner edge 11B toward a groove bottom, and at least one second side surface S2 extending from a bottom side end of the first side surface S1 toward the groove bottom, and the second side surface S2 is a surface inclined toward the inner side in the tire axial direction relative to the first side surface S1.

Abstract: A tread portion of a tire includes at least one land portion. The land portion includes an outer region disposed inwardly of a tread surface in a tire radial direction, an inner region disposed on an inner side in the tire radial direction, and at least one sipe. The sipe includes one outer sipe element extending in the outer region in a tire axial direction, and a plurality of inner sipe elements extending in the inner region. The inner sipe elements include a component extending in a tire circumferential direction, and is connected to the outer sipe element.

Abstract: Provided is an evaluation method that can easily evaluate the percentage of voids in a rubber material. The present disclosure relates to an evaluation method including evaluating the percentage of voids in a rubber material with a strain applied thereto based on the ?void calculated from the following Equation (1) using the transmittance and thickness of the rubber material with no strain applied thereto and the transmittance and thickness of the rubber material with the strain applied thereto.

Abstract: A golf club head includes a weight object and a weight object receiving portion that is provided on an outer surface of the head and in which at least a part of the weight object is housed. The weight object or the weight object receiving portion includes a shape change mechanism that enables the weight object or the weight object receiving portion to change a shape of itself. The weight object receiving portion includes: a rotational force applying part that applies a rotational force on the weight object as a reaction generated when the weight object is pressed by the shape change; and a rotation prevention part that is located at a position abutting against the weight object when the rotational force is applied and that stops the weight object from being rotated by the rotational force and prevents rotation of the weight object.