Abstract: A golf ball can include a core, a mid layer, and a cover. A hardness Hm of the mid layer can be larger than a hardness Hc of the cover. In a graph on which distances of and Shore C hardnesses at a central point of the core, six points between the central point and a surface of the core, and a point on the surface are plotted, a slope A1 of a straight line connecting the central point and a first point can be not less than 1.00. A maximum value Amax of absolute values of the following slopes A2 to A7 can be not greater than 0.90. A2: a slope of a straight line connecting the first point and a second point. A3: a slope of a straight line connecting the second point and a third point. A4: a slope of a straight line connecting the third point and a fourth point. A5: a slope of a straight line connecting the fourth point and a fifth point. A6: a slope of a straight line connecting the fifth point and a sixth point. A7: a slope of a straight line connecting the sixth point and the point on the surface.

Abstract: The aqueous adhesive for a tennis ball includes rubber latex. The rubber latex is a mixture of liquid rubber latex and solid rubber latex. A ratio of liquid rubber to an entire rubber component contained in the rubber latex is greater than 20% by weight and less than 90% by weight in terms of solid content. The tennis ball includes a seam formed of the aqueous adhesive for a tennis ball.

Abstract: An object of the present disclosure is to provide a golf ball that can fly in a lowered maximum height on driver shots by a golfer with a fast head speed. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer, and an outermost cover having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a base rubber, a co-crosslinking agent, and a crosslinking initiator, the base rubber contains a natural rubber, the co-crosslinking agent contains methacrylic acid and/or a metal salt thereof, a total lower volume of the plurality of dimples is 365 mm3 or more, and an occupation ratio of a total area of the plurality of dimples in a surface area of a phantom sphere that is assumed to have no dimples on the outermost cover is 75% or more.

Abstract: A motorcycle tire can include a tread portion, sidewall portions, bead portions, and a carcass. The tread portion can include a tread reinforcing layer and a tread rubber. The tread reinforcing layer can include a belt layer and a band layer. A development width of the band layer can be smaller than that of the belt layer. The tread rubber can include a crown rubber and shoulder rubbers. A hardness at 100° C. of each shoulder rubber can be higher than a hardness at 100° C. of the crown rubber, a complex elastic modulus at 100° C. of each shoulder rubber can be higher than a complex elastic modulus at 100° C. of the crown rubber, and a 300% modulus at 100° C. of each shoulder rubber can be higher than a 300% modulus at 100° C. of the crown rubber.

Abstract: An object of the present disclosure is to provide a golf ball that has a small difference between a flight distance on driver shots by a golfer with a fast head speed and a flight distance on driver shots by a golfer with a slow head speed, and can reduce flight distance handicap. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer, and an outermost cover having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a base rubber, a co-crosslinking agent, and a crosslinking initiator, the base rubber contains a natural rubber, a total lower volume of the plurality of dimples is 365 mm3 or more, and an occupation ratio of a total area of the plurality of dimples in a surface area of a phantom sphere that is assumed to have no dimples on the outermost cover is 75% or more.

Abstract: A tire that allows enhancement of running performance on a deep snow road surface is provided. A tire 1 includes a first shoulder block 3. The first shoulder block 3 includes a first tread surface 5 extending inward from a first tread end T1 in the tire axial direction, a first side surface 6 extending inward from the first tread end T1 in the tire radial direction, and a second tread surface 7 extending outward from the first side surface 6 in the tire axial direction. The second tread surface 7 extends at an angle ? of 10° or less relative to a contact line 5n extending in contact with the first tread surface 5 through the first tread end T1. At least one groove 8 is disposed in the second tread surface 7.

Abstract: The present invention is directed to a pneumatic tire including: a tread portion; a pair of sidewall portions extending to an inner side in a tire radial direction from both respective ends in a tire axial direction of the tread portion; a pair of bead portions located on the inner side in the tire radial direction relative to the pair of respective sidewall portions; and a plurality of Helmholtz sound absorbers disposed on a tire inner cavity surface. The plurality of Helmholtz sound absorbers include first and second sound absorbers respectively having a first resonance frequency and a second resonance frequency different from the first resonance frequency. Each of the first and second sound absorbers is disposed on an inner side in the tire axial direction relative to at least one of either of the pair of sidewall portions and either of the pair of bead portions.

Abstract: A pneumatic tire can include a plurality of Helmholtz sound absorbers on a tire inner cavity surface. The plurality of Helmholtz sound absorbers can have a first resonance frequency as a maximum resonance frequency and a second resonance frequency as a minimum resonance frequency. A difference between the first resonance frequency and the second resonance frequency can be 10 to 90 Hz.

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 golf club includes a head, a shaft, and a grip. The head has a center-of-gravity depth of greater than or equal to 23.5 mm. The head has a center-of-gravity distance of less than or equal to 39 mm. The shaft has a forward flex of greater than or equal to 110 mm. When f1 denotes the forward flex of the shaft and f2 denotes a backward flex of the shaft, f2/f1 may be greater than or equal to 0.8 and less than or equal to 0.9. The head may have a volume of greater than or equal to 380 cc. The shaft may have a weight of less than or equal to 50 g.

Abstract: An object of the present disclosure is to provide a golf ball having good shot feeling, rolling in a short distance and having excellent controllability on approach shots. The present disclosure provides a golf ball 2 comprising a spherical core 4, an intermediate layer 6 and an outermost cover 8, wherein the spherical core 4 is formed from a rubber composition containing a natural rubber, a center hardness (H0) of the spherical core 4, hardnesses (H2.5, H5.0, H7.5, H10, H12.5, H15) at points having a radial distance of 2.5 mm, 5.0 mm, 7.5 mm, 10 mm, 12.5 mm and 15 mm from a center of the spherical core 4, and a surface hardness (Hs) of the spherical core 4 satisfy a relationship of H0<H2.5<H5.0<H7.5<H10<H12.5<H15<Hs, the center hardness (H0) is 60 or less in Shore C hardness, and a slab hardness of an intermediate layer composition forming the intermediate layer 6 is greater than a slab hardness of a cover composition forming the outermost cover 8.

Abstract: An object of the present disclosure is to provide a golf ball having good shot feeling on iron shots, having excellent controllability due to a short rolling distance, and being slightly affected by the wind due to a low maximum flying height. The present disclosure provides a golf ball 2 comprising a spherical core 4, an intermediate layer 6 and an outermost cover 8, wherein the spherical core 4 is formed from a rubber composition containing a natural rubber and methacrylic acid and/or a metal salt thereof, and a center hardness (H0) of the spherical core 4, hardnesses (H2.5, H5.0, H7.5, H10, H12.5, H15) at points having a radial distance of 2.5 mm, 5.0 mm, 7.5 mm, 10 mm, 12.5 mm and 15 mm from a center of the spherical core 4, and a surface hardness (Hs) of the spherical core 4 satisfy a relationship of H0<H2.5<H5.0<H7.5<H10<H12.5<H15<Hs.

Abstract: An iron-type golf club head comprises a face portion and a hosel portion which are integrally formed by forging or casting soft iron. The face portion has a face hardness hf (HV) which is defined by Vickers hardness at a depth of 4 mm from the hitting surface at a main impact point. The hosel portion has a reference hosel outer peripheral portion defining a hosel hardness hh (HV) which is an average value of Vickers hardness measured at positions around the hosel axis, and at a depth of 1 mm from the outer surface thereof. The hosel hardness hh is higher than the face hardness hf.

Abstract: A tire abnormality determination system can include: a related information acquisition portion that acquires deterioration-related information that may exert influence on deterioration of a non-pneumatic tire mounted on a vehicle; a first determination processing portion that determines, based on the deterioration-related information, at least one of presence or absence of a sign of an abnormality in the non-pneumatic tire and presence or absence of the abnormality in the non-pneumatic tire; and an output processing portion that outputs a first determination result of the first determination processing portion to a predetermined output destination.

Abstract: A tire includes a tread portion having a first land region provided with first axial grooves and a second land region provided with second axial grooves. The first axial grooves are arranged at intervals in a first arrangement over the entire tire circumference. In the first arrangement, in a pair of adjacent first axial grooves, a first end of one first axial groove is located at the same position in the tire circumferential direction as the second end of the other first axial groove. The second axial grooves are arranged at intervals in a second arrangement. The number of types of a second pitch of the second axial grooves in the second arrangement is greater than the number of types of a first pitch of the first axial grooves in the first arrangement.

Abstract: A pneumatic tire of the present invention includes a tire inner cavity 1B and a porous sound damper 10. The sound damper 10 is an annular body extending in a tire circumferential direction and is not adhered to a surface of the tire inner cavity 1B. An average thickness T (mm) of the sound damper 10 and an inner cavity surface radius R (mm) satisfy the following formula (1). An average circumferential length L (mm) in a circumferential direction of the sound damper 10 in a state where the sound damper 10 is removed from the pneumatic tire, and an inner cavity surface circumferential length C (mm), satisfy the following formulas (2) and (3). 0.04 ? T / R ? 0 .18 ( 1 ) 1.02 - 1.1 × T / R ? L / C ? 0 . 9 ? 5 + 1.4 × T / R ( 2 ) L / C ? 1 .

Abstract: A pneumatic tire can include a carcass, a belt layer, and reinforcing rubber layers. Turned-up portions of a carcass ply each include a first portion located between a body portion and the belt layer, a second portion adjacent to each reinforcing rubber layer in a tire axial direction, on an outer side in a tire radial direction with respect to a rim flange of a standardized rim, and a third portion located between the first portion and the second portion. A length of the third portion is 0.8 to 1.4 times a sum (La+Lb) of a length La of the first portion and a length Lb of the second portion.

Abstract: A golf club head with a hollow therein includes a face portion and a main body portion including a crown portion and a sole portion extending rearward from the face portion. The main body portion is provided with a slit penetrating the main body portion to the hollow, and a surrounding area of the slit is at least partially provided with a thick portion. The slit is arranged so that at least part of the slit is visible in a front view of the golf club head under its reference state, where the reference state is such that the head is placed on a horizontal plane at a lie angle and a loft angle specified for the head, while keeping a shaft axis center line of the head on a reference vertical plane.

Abstract: A tire has a sidewall portion provided with a protrusion which includes a radially outer design portion, a mark portion and a radially inner design portion. The radially outer design portion has a radially inward contour portion comprising radially inward peak points protruding radially inward. The radially inner design portion is spaced apart from the mark portion in the tire circumferential direction. The radially inner design portion includes a radially outward contour portion having radially outward peak points protruding outward in the tire radial direction. Each of the radially inward peak points is provided at a different position in the tire radial direction than each of the radially outward peak points.

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).