A tire has a cap rubber formed of nonconductive rubber and forms a ground surface, and a conductive portion provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction. The conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber. The conductive portion is relatively small in a thickness in the ground surface and a side surface of the cap rubber, is relatively large in the maximum thickness of an intermediate portion between the ground surface and the side surface of the cap rubber, and is formed into a crescent shape which is curved into an outer side in a tire width direction and an outer side in a radial direction, in a tire meridian cross section.

Tire tread configured to reduce tread wear due to non-zero toe angle alignment and road crown, wherein the tire tread includes intermediate tread elements (28i) having first and second lateral sides (32A, 32B), the first lateral side (32A) extending in a direction of the tread thickness by a first lateral side angle (.sub.A) relative to a radial reference direction and the second lateral side (32B) extending in a direction of the tread thickness by a second lateral side angle (.sub.B) relative to a radial reference direction, whereby the tread is characterized in that the average lateral side angle equaling the average angle of all of the first and second lateral side angles for all of the plurality of intermediate tread elements along the length of the tread greater than 3 degrees or less than 3 degrees

A method of mounting a tire on a vehicle includes providing a tire having a first side, a second side, and a circumferential tread disposed about the tire. The first side defines a first forward rotation direction and the second side defines a second forward rotation direction. The circumferential tread includes a plurality of tread elements, and at least one of the plurality of tread elements includes a sipe arrangement including a plurality of sipes that are angled in a depth direction of the tire. The plurality of sipes are disposed on a first half of the tread element and no sipes are disposed on a second half of the tread element. The sipe arrangement causes the tire to exhibit a first tire performance when the tire is mounted on the vehicle in the first orientation and rotated in the first forward rotation direction, and further causes the tire to exhibit a second tire performance when the tire is mounted on the vehicle in the second orientation and rotated in the second forward rotation direction. The method includes mounting the tire on the vehicle in the first orientation for driving the vehicle in a first set of conditions, and mounting the tire on the vehicle in the second orientation for driving the vehicle in a second set of conditions.

A motorcycle tire includes a tread portion including a crown portion that is a region of 50% of a tread development width centered on a tire equator, a first shoulder portion that is an outer region of the crown portion, and first lateral grooves. Each lateral groove includes a first groove portion in the crown portion, a second groove portion in the first shoulder portion, and a third groove portion connecting the first and second groove portions. A groove depth and a groove width of the third groove portion are respectively smaller than groove depths and groove widths of the first groove portion and the second groove portion, respectively. More than 80% of a tire axial length of the third groove portion is in the first shoulder portion.

A pneumatic tire includes a fastener disposed on a tire inner surface, the fastener being a first fastener of a separatable pair of mechanical fasteners and being composed of at least two fastener members. The at least two fastener members sandwich a rubber-coated fiber reinforced member and fix together. The fastener is disposed at a position such that a distance (D) in a tire width direction from a center position (C) of the fastener to a tire equator line (L) and a maximum width (W) of the tire satisfy a following relationship: 0D/W0.40. The fiber reinforced member includes a plurality of fiber bundles disposed in alignment in at least one direction, a number of fiber bundles Y (bundles/50 mm width) per unit width of the fiber reinforced member being such that: 20Y (bundles/50 mm width)90.

A pneumatic tire in which a side reinforcement layer formed of a treated member is arranged, the treated member formed by coating with rubber organic fiber cords extending parallelly to ply cords of a carcass ply of the carcass main body, only on a sidewall portion of a half portion on one tire widthwise side; a tire radial inner end of the side reinforcement layer is located on a side inner in the tire radial direction than a tire radial outermost position of a rim flange, and a tire radial outer end of the side reinforcement layer overlaps the belt by 5 mm or more in a tire widthwise direction; and the tread portion has one or more circumferential main grooves, and a contact width of a tire widthwise outermost land portion is larger than a contact width of a tire widthwise outermost land portion.

A run-flat radial tire having a tire cross-section height of 115 mm or greater including: a carcass spanning between a pair of bead portions; a vehicle mounting direction outer side side-reinforcing rubber layer that is provided to a tire side portion at a vehicle mounting direction outer side and that extends in a tire radial direction along an inner face of the carcass; and a vehicle mounting direction inner side side-reinforcing rubber layer that is provided to a tire side portion at a vehicle mounting direction inner side and that extends in the tire radial direction along an inner face of the carcass, a tire radial direction outer side end portion of the vehicle mounting direction inner side side-reinforcing rubber layer being closer to a tire equatorial plane than a tire radial direction outer side end portion of the vehicle mounting direction outer side side-reinforcing rubber layer.

Tire for motorcycles, having a tread band includes a central annular portion symmetrically located astride an equatorial plane and two shoulder annular portions located on axially opposite sides with respect to the central annular portion. The tread band has a void-to-rubber ratio not greater than 25%. The central annular portion has an axial extension not greater than 65% of the axial development of the tread band and the central portion has at least one module circumferentially repeated. Each shoulder portion has an axial extension not greater than 40% of the axial development of the tread band and the module includes at least one pair of first grooves with substantially circumferential course, at least partially located on opposite sides with respect to the equatorial plane. The central annular portion has a void-to-rubber ratio not smaller than 10% and the module includes a plurality of second grooves located substantially transversally with respect to the equatorial plane. The substantially transverse second grooves define in each module together with said first grooves at least two tread band solid portions. The second grooves have at least one end spaced away from the adjacent first groove by a distance so as to form a substantially continuous tread portion adapted to connect at least two tread band solid portions.

A method for controlling the rolling resistance of a running tyre includes: manufacturing a tyre, installing the tyre on a rim, mounting a wheel on a vehicle. The tyre is manufactured by obtaining an external profile of the tyre that is asymmetric with respect to a middle line plane of the tyre and configured to generate, between the tyre rotating in rectilinear running and the ground, a lateral conicity force, conferring to the tyre the asymmetric external profile. The asymmetric external profile is obtained so as to control a resulting lateral force exchanged between the ground and the tyre and to limit a rolling resistance of the tyre running on rectilinear trajectory.

A run-flat tire has a carcass that spans a region between a pair of bead portions, a side reinforcement layer that is provided at a tire side portion that connects the bead portions and a tread portion, an inclined belt layer that is provided at an outer side of the carcass in a tire radial direction so as to span a tire equatorial plane CL, and that is formed by cords that are inclined relative to the tire circumferential direction, and a reinforcement cord layer that is provided at an outer side of the inclined belt layer in the tire radial direction, and only on a half portion of the tire that is located on an inner side in a tire fitting direction of the tire equatorial plane CL, and that is formed by cords that are inclined relative to the tire circumferential direction.