Abstract: A pneumatic tire includes: a rim cushion rubber disposed in a bead portion where the bead portion and a rim are in contact with each other; an electrically conductive rubber disposed in the rim cushion rubber, the electrically conductive rubber having an electrical resistance value lower than that of the rim cushion rubber, and including a first end exposed on an outer surface of the rim cushion rubber in contact with the rim, and a second end disposed in contact with a tire component adjacent to the rim cushion rubber; and an earth tread rubber disposed in a tread portion passing through a cap tread rubber and an undertread rubber of the tread portion, the earth tread rubber having an electrical resistance value lower than that of the cap tread rubber.

Abstract: The present technology provides a pneumatic tire having a strip-shaped sound-absorbing member bonded on the inner surface of the tire includes a plurality of belt layers, two or more belt cover layers, one or more belt edge cover layers, and a thread rubber layer. The thickness of the tread rubber layer is substantially uniform in the region X where the sound-absorbing member is located so that the difference between the thickness t1 at an end of the sound-absorbing member and the thickness t0 at the position of the tire equator is equal to or less than 0.5 mm. The thickness of the tread rubber layer is smaller in the region Y where the belt edge cover layer is located than in the region X so that the difference between the minimum value t2 of the thickness in the region Y and the thickness t0 ranges from 1.0 to 4.0 mm.

Abstract: A pneumatic tire including a plurality of circumferential main grooves extending in a tire circumferential direction and a plurality of land portions partitioned and formed by these circumferential main grooves in a tread portion. Additionally, the plurality of land portions have a plurality of sipes, respectively. Moreover, not less than 90% of the sipes disposed in an inner side region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in an outer side region are constituted by three-dimensional sipes. Furthermore, the tread portion has a cap rubber and an under rubber. A rubber hardness H1in at ?10° C. and a rubber hardness H2in at 20° C. of the cap rubber 151in in the inner side region, and a rubber hardness H1out at ?10° C. and a rubber hardness H2out at 20° C. of the cap rubber 151out in the outer side region have relationships such that H1in<H1out and H2in<H2out.

Abstract: A pneumatic tire including a plurality of circumferential main grooves extending in a tire circumferential direction and a plurality of land portions partitioned and formed by these circumferential main grooves in a tread portion. Additionally, the plurality of land portions have a plurality of sipes, respectively. Moreover, not less than 90% of the sipes disposed in an inner side region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in an outer side region are constituted by three-dimensional sipes. Furthermore, the tread portion has a cap rubber and an under rubber. A rubber hardness H1in at ?10° C. and a rubber hardness H2in at 20° C. of the cap rubber 151in in the inner side region, and a rubber hardness H1out at ?10° C. and a rubber hardness H2out at 20° C. of the cap rubber 151out in the outer side region have relationships such that H1in<H1out and H2in<H2out.

Abstract: A pneumatic tire including a plurality of circumferential main grooves extending in a tire circumferential direction and a plurality of land portions partitioned and formed by these circumferential main grooves in a tread portion. Additionally, each of these land portions has a plurality of sipes, respectively. Moreover, not less than 90% of the sipes disposed in the inner side region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in the outer side region are constituted by three-dimensional sipes. The left and right shoulder land portions each have a plurality of lug grooves arranged in the tire circumferential direction. A pitch number Nin of the lug grooves in the shoulder land portion on the inner side region side and a pitch number Nout of the lug grooves in the shoulder land portion on the outer side region side have a relationship such that Nin>Nout.

Abstract: The pneumatic tire is provided with: a rim cushion rubber (5A) disposed in a bead portion (5) at a location in contact with a rim (R); and a conductive rubber (11) disposed together with the rim cushion rubber (5A) and having a first end (11a) exposed on the outer surface of the rim cushion rubber (5A) so as to contact the rim (R), and a second end (11b) contacting a tire configuration member (carcass layer (6)) adjacent to the rim cushion rubber (5A). The conductive rubber (11) has an electrical resistance value smaller than that of the rim cushion rubber (5A).

Abstract: A pneumatic tire having a tread portion, side wall portions, and bead portions includes at least one row of blocks constituted by a plurality of blocks aligned in a tire circumferential direction formed in a vehicle inner side region and a vehicle outer side region of the tread portion. Sipes extend in a tire width direction in each of the blocks. A pitch count of the blocks constituting the row of blocks in the vehicle inner side region is greater than the pitch count of the blocks constituting the row of blocks in the vehicle outer side region. Sipes formed in the blocks in the vehicle outer side region are provided with a structure extending in a linear manner along the depth direction thereof and sipes formed in the blocks in the vehicle inner side region are provided with a structure extending while curving along the depth direction thereof.

Abstract: A pneumatic tire including a first row of blocks arranged in a substantially central region of a tread of the pneumatic tire, wherein the first row of blocks includes a plurality of first blocks; a plurality of first grooves, each arranged between two adjacent first blocks; a plurality of second rows of blocks each including a plurality of second blocks, each arranged on either side of the first row of blocks; a plurality of second grooves, each arranged between the first row of blocks and each of the second rows of blocks; and a plurality of third grooves, wherein each third groove is arranged between two adjacent second blocks, the third grooves including a plurality of fourth grooves and a plurality of fifth grooves, with each fourth groove being narrower than each fifth groove, and the fourth groove and fifth groove being arranged alternately.

Abstract: A pneumatic tire includes a carcass layer, a belt layer, a tread rubber having a cap tread and an undertread, a pair of side wall rubbers, a pair of rim cushion rubbers, and an earthing tread that is exposed to a road contact surface of the tread rubber and that penetrates the cap tread and the undertread to contact the belt layer in an electrically conductive manner. The earthing tread includes a widened portion having a cross-sectional area that widens toward a contact surface with the belt layer at the contact portion with the belt layer. The widened portion of the earthing tread has a profile shape that bulges outward in a tire width direction.

Abstract: A pneumatic tire includes: a pair of bead portions including a bead core and a bead filler; a carcass layer having a single-layered structure and extending between the bead portions; and a plurality of belt layers disposed at outer circumference of the carcass layer, wherein the carcass layer is folded around the bead core to enfold the bead filler and to have a folded portion that extends to a position beneath a side edge portion of one of the belt layers, and wherein the pneumatic tire further includes a rubber reinforcing layer made of rubber having JIS hardness in a range from 70 to 100 and having average thickness in a range from 0.5 mm to 3.0 mm, the rubber reinforcing layer being disposed on the folded portion at a side wall portion to extend across a maximum width position Pm of the carcass layer.

Abstract: A pneumatic tire having a tread portion, side wall portions, and bead portions includes at least one row of blocks constituted by a plurality of blocks aligned in a tire circumferential direction formed in a vehicle inner side region and a vehicle outer side region of the tread portion. Sipes extend in a tire width direction in each of the blocks. A pitch count of the blocks constituting the row of blocks in the vehicle inner side region is greater than the pitch count of the blocks constituting the row of blocks in the vehicle outer side region. Sipes formed in the blocks in the vehicle outer side region are provided with a structure extending in a linear manner along the depth direction thereof and sipes formed in the blocks in the vehicle inner side region are provided with a structure extending while curving along the depth direction thereof.

Abstract: A pneumatic tire including a plurality of circumferential main grooves extending in a tire circumferential direction and a plurality of land portions partitioned and formed by these circumferential main grooves in a tread portion. Additionally, the plurality of land portions have a plurality of sipes, respectively. Moreover, not less than 90% of the sipes disposed in an inner side region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in an outer side region are constituted by three-dimensional sipes. Furthermore, the tread portion has a cap rubber and an under rubber. A rubber hardness H1in at ?10° C. and a rubber hardness H2in at 20° C. of the cap rubber 151in in the inner side region, and a rubber hardness H1out at ?10° C. and a rubber hardness H2out at 20° C. of the cap rubber 151out in the outer side region have relationships such that H1in<H1out and H2in<H2out.

Abstract: Provided are a pneumatic tire and a manufacturing method of the same capable of improving a separation failure at end portions of an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition. The pneumatic tire includes an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin component and an elastomer component. The inner liner layer is provided on an inner side of the tire so as to face a tire cavity. A recessed portion is formed in an internal surface area of the tire where an end portion of the inner liner layer is located.

Abstract: A pneumatic tire having improved driving stability and wear resistance on dry road surfaces and improved running performance on snow. The pneumatic tire includes a tread portion provided with first, second and third main grooves extending in a tire circumferential direction and a plurality of lug grooves each extending from one shoulder side to the other shoulder side. A width of a first land section defined between the first and second main grooves is set greater than a width of a second land section defined between the first and third main grooves, a plurality of inclined grooves are provided in the first land section, where each inclined groove communicates with at least three of the lug grooves while being inclined to the tire circumferential direction, and one end of each inclined groove is open to one of the lug grooves while the other end thereof is terminated within a block.

Abstract: A pneumatic tire according to the present invention improves wet performance. The pneumatic tire has a tread surface 1. A first main groove 2 extending in the circumferential direction TC of the tire is provided in the tread surface 1. First lateral grooves 7 extending from the first main groove 2 outward in the widthwise direction of the tire beyond one ground contact end TX1 of the tire are disposed at prescribed intervals in the circumferential direction TC of the tire. Blocks 8 are defined by the first main groove 2 and the first lateral grooves 7. The first lateral grooves 7 comprise inner groove portions 7A and outer groove portions 7B. The inner groove portions 7A extend with their widths gradually increasing from the first main groove 2 outward in the widthwise direction of the tire to midways of the first lateral grooves 7.

Abstract: Provided are a pneumatic tire and a manufacturing method of the same capable of improving a separation failure at end portions of an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition. The pneumatic tire includes an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin component and an elastomer component. The inner liner layer is provided on an inner side of the tire so as to face a tire cavity. A recessed portion is formed in an internal surface area of the tire where an end portion of the inner liner layer is located.

Abstract: Disclosed is a pneumatic tire which is allowed to increase block stiffness not only during braking and driving but also during cornering, and is allowed thereby to compatibly enhance tire performances both during braking and driving and during cornering.

Abstract: Provided is a pneumatic tire having improved driving stability and wear resistance on dry road surfaces as well as an improved running performance on snow. The present invention provides a pneumatic tire designed to be mounted on a vehicle so that a designated side of the tire should face to the outside of the vehicle. The pneumatic tire includes a tread portion provided with: a first main groove extending in a tire circumferential direction; a second main groove extending in the tire circumferential direction in a shoulder region closer to the center of the vehicle than the first main groove; a third main groove extending in the tire circumferential direction in a shoulder region farther from the center of the vehicle than the first main groove; and a plurality of lug grooves each extending from one shoulder side to the other shoulder side.

Abstract: A pneumatic tire according to the present invention improves wet performance. The pneumatic tire has a tread surface 1. A first main groove 2 extending in the circumferential direction TC of the tire is provided in the tread surface 1. First lateral grooves 7 extending from the first main groove 2 outward in the widthwise direction of the tire beyond one ground contact end TX1 of the tire are disposed at prescribed intervals in the circumferential direction TC of the tire. Blocks 8 are defined by the first main groove 2 and the first lateral grooves 7. The first lateral grooves 7 comprise inner groove portions 7A and outer groove portions 7B. The inner groove portions 7A extend with their widths gradually increasing from the first main groove 2 outward in the widthwise direction of the tire to midways of the first lateral grooves 7.

Abstract: A pneumatic tire includes center blocks that are arranged over an equator of the pneumatic tire. Second blocks are arranged on outer sides of the center blocks in the direction of the width of the pneumatic tire. One center block opposes at least three second blocks.