Abstract: A pneumatic tire includes a pair of sidewalls, a pair of bead portions, and a circumferential tread having a plurality of circumferential ribs and a plurality of circumferential grooves. A reinforcing layer is disposed in at least one of the plurality of circumferential ribs. No part of the reinforcing layer extends directly below a bottom surface of any of the plurality of circumferential grooves. The reinforcing layer has a consistent gauge along its entire lateral width. A top surface of the reinforcing layer is located radially higher than the bottom surface of each of the plurality of circumferential grooves.

Abstract: A pneumatic tire tread pattern includes, on a first side in a width direction relative to a tire centerline, first lug grooves in a shoulder land portion extending from an outer side in the width direction toward and connecting with a shoulder side main groove; and second lug grooves in a middle land portion between the shoulder side main groove and a center side main groove, the second lug grooves extending from a portion of the shoulder side main groove between connection positions of circumferentially adjacent first lug grooves with the shoulder side main groove, toward the center side main groove, and being closed within the middle land portion. The first lug grooves are inclined, at the connection position, to one side in the circumferential direction relative to the width direction. The second lug grooves are inclined to be parallel with an inclination direction of the first lug groove.

Abstract: A tread pattern of a pneumatic tire includes circumferential main grooves, lug grooves and first and second sipes connecting the circumferential main grooves, a block land portion defined by the circumferential main grooves and the lug grooves and including the sipes. The lug grooves and the first and second sipes have a shape that projects toward one direction in the circumferential direction. A shallow depth groove raised bottom is provided in a turning portion where the lug groove includes a projecting apex. The projecting apex of a sipe turning portion including the projecting apex of the first sipe is within the range of the shallow depth groove raised bottom, and is inward in the lateral direction compared with the position of the projecting apex of a sipe turning portion including the projecting apex of the second sipe.

Abstract: A pneumatic tire having lug grooves in shoulder land portions that each include one end reaching at least a ground contact edge and an other end terminating in the shoulder land portion. Sipes in the shoulder land portions each include one end communicating with a shoulder main groove and an other end terminating in a ground contact region. Lug grooves in intermediate land portions each include one end communicating with the shoulder main groove and an other end terminating in the intermediate land portion. Sipes in the intermediate land portion each include one end communicating with a center main groove and an other end terminating in the intermediate land portion. Sipes in the center land portion each include one end communicating with the center main groove and an other end terminating in the center land portion without exceeding a tire center line.

Abstract: A pneumatic tire including a belt constituted by at least one belt layer on a tire radial-direction inner side of a tread portion. The belt layer includes a reinforcing element containing plural metal filaments aligned in a single row without being twisted together is embedded in an elastomer. The tread portion includes: two or more circumferential main grooves arranged within a width of a ground-contact surface; and land portions, and widthwise sipes are arranged in at least one of center land portion. The widthwise sipes each include: a linear portion linearly extending from the surface of the tread portion toward the tire radial-direction inner side; and a bent portion extending from the linear portion toward the tire radial-direction inner side, and the length of the linear portion increases from an extending length center portion of each widthwise sipe toward at least one of tread widthwise end portions.

Abstract: In a tread portion of a pneumatic tire, an average lateral groove width Lc of a center region is obtained by dividing the groove area of lateral grooves in the center region by a circumferential length of the center region, and an average lateral groove width Lsh of a shoulder region is obtained by dividing the groove area of lateral grooves in the shoulder region by a circumferential length of the shoulder region. A relationship between a tire average thickness Gc of the center region and a tire average thickness Gsh in the shoulder region satisfies 1.05?(Gc/Gsh)?1.35, a relationship between the average lateral groove width Lc of the center region and the tire average thickness Gc in the center region satisfies 0.07?(Lc/Gc)?0.12, and a relationship between the average lateral groove width Lsh of the shoulder region and the tire average thickness Gsh in the shoulder region satisfies 0.17?(Lsh/Gsh)?0.26.

Abstract: In a tire 2, each crown block 22c has a laterally extending shape that is longer in an axial direction and shorter in a rotation direction. A top surface 32c of the crown block 22c includes a crown front edge 46c. The crown front edge 46c has a bottom BC located on a heel side with respect to both ends thereof in the rotation direction. Of the crown front edge 46c, a portion connecting the bottom BC and each end forms an inclined edge 54c extending from the bottom BC to the end and inclined to a toe side in the rotation direction. The inclined edge 54c of the crown front edge 46c includes at least three edge components 58c.

Abstract: A pair of main grooves disposed on both sides of a tire equator of a pneumatic tire and extending along a tire circumferential direction is configured so that a series of bent elements formed by connecting at least five linear groove portions via bend points are continuously and repeatedly arranged in the tire circumferential direction, and the at least five linear groove portions included in each of the bent elements have three or more types of inclination angles with respect to the tire circumferential direction and have five or more types of lengths.

Abstract: Method for controlling the symmetry of the footprint area of a tyre miming on a straight trajectory with camber angle different from zero, wherein the method comprises the steps: —reducing the contact pressure of the tyre (2) on the footprint area at an inner shoulder (in case of negative camber) or at an outer shoulder (in case of positive camber); —disposing any medium line (Im) of the tread band (9) placed in correspondence with the footprint area substantially parallel to the ground; the invention also defines a tyre and a wheel for motor-vehicles, wherein the medium line (Im) of the tread hand (9) and the rotation axis (X-X) of the tyre (2) form an angle (a) substantially equal in absolute value to the camber angle (?); the invention also encompasses a process for manufacturing such tyres, wherein a green tyre with symmetric outer profile is deformed during the vulcanising and moulding step until a predetermined angle (a) different from zero is formed between any medium line (Im) of the tread band (9) an

Abstract: A tread of a tire includes a plurality of blocks including a center block located on an equator plane and a side block located outward of the center block in an axial direction. Each of the plurality of blocks includes a land surface that forms a part of a tread surface. In the tread surface, a total area of the land surfaces is smaller than a total area of a portion other than the land surfaces. A complex elastic modulus at a maximum strain amplitude of 1% and a temperature of 70° C. of each block is not less than 10.0 MPa. A 300% modulus at a temperature of 75° C. of each block is not greater than 6.0 MPa.

Abstract: A tire includes a tread portion includes circumferential grooves and a land portion divided by the circumferential grooves. The land portion has a ground contacting surface provided with first blind grooves, second blind grooves, first connecting sipes, second connecting sipes, and transverse sipes. The transverse sipes include first portions extending from a first circumferential edge with an inclination, second portions extending from the second circumferential edge and inclined in a same direction as with the inclination of the first portions, and third portions connecting the first and second portions with an inclination at a different angle from that of the inclination the first and second portions. In a plan view of the tread portion, the first portions overlap projection regions in which the respective first connecting sipes or the respective second connecting sipes are expanded parallel to the tire axial direction.

Abstract: Provided is a pneumatic tire. Center blocks in a center region of a tread section are arrayed to form a pair between which are interposed inclined grooves inclined with respect to a circumferential direction. The center blocks straddle an equator from one side to the other. Notches composed of a first and second walls connected in a V shape are in treads in each center block. The first walls extend at an angle within ±20° with respect to the circumferential direction. The second walls extend at an angle of ±10° with respect to a width direction. Inclined grooves are each constituted by a see-through portion and an expanded portion having a larger groove width than the see-through portion. A width of a see-through region that can extend without intersecting an extension line of the see-through portion is made to be equal to or greater than 30% of a tread width.

Abstract: A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction and arranged side by side in the tire width direction and a land portion defined by the circumferential main grooves. The land portion includes notch portions extending in the tire width direction and connected to the circumferential main grooves and shallow groove portions connected to the notch portions, respectively, and terminating in the land portion. The height of the notch portions decreases continuously toward the circumferential main grooves connected thereto.

Abstract: Provided is a pneumatic tire. In shoulder regions of a tread portion, as shoulder blocks, inner blocks and outer blocks, which have outer edges in a tire lateral direction at different positions on a tread contact surface, are alternately disposed in a tire circumferential direction. In shoulder grooves disposed between the inner blocks and outer blocks adjacent to each other in the tire circumferential direction, groove bottom protrusions, which extend from a laterally inner side to a laterally outer side in the tire lateral direction along the shoulder grooves over the positions of the outer edges of the inner blocks, are provided. Broad width portions having a relatively broad protrusion width of the groove bottom protrusions are disposed on a laterally outer side in the tire lateral direction with respect to the outer edges of the inner blocks in a front view.

Abstract: A tire has a tread portion divided into a crown land region, shoulder land regions, and middle land regions. The crown land region comprises a crown axial central portion. The middle land region comprises a middle axial inner portion and a middle axial outer portion. The shoulder land region comprises a shoulder axial inner portion and a shoulder axial central portion. The radius Rmi of curvature of the middle axial inner portion is 0.80 to 1.20 times the radius Rcc of curvature of the crown axial central portion. The radius Rsc of curvature of shoulder axial central portion is 0.80 to 1.20 times the radius Rmo of curvature of middle axial outer portion. The radii Rsc and Rmo are less than the radii Rcc and Rmi. The radius Rsi of the shoulder axial inner portion is less than the radii Rsc and Rmo.

Abstract: The pneumatic tire includes a shoulder main groove and a center main groove disposed in one region demarcated by a tire equatorial plane and a shoulder land portion and a middle land portion defined by the shoulder main groove. The shoulder land portion is a rib that is continuous in a tire circumferential direction, and the middle land portion includes a plurality of middle lug grooves and a plurality of middle blocks defined by the plurality of middle lug grooves. When defining a section in the tire circumferential direction along an edge portion of one middle block close to the shoulder main groove, a groove width of the shoulder main groove continuously increases or decreases in the section.

Abstract: A tire includes a tread surface portion with inclined grooves, 2ND longitudinal grooves, and shoulder longitudinal grooves; and an indicator portion that indicates a rotation direction of the tire in which a vehicle travels forward. The inclined groove gradually extends forward in the rotation direction toward a tire equator from the outside in the tire width direction. A front surface among inner surfaces defining the inclined groove includes a first side surface with an inner end portion to which the 2ND longitudinal groove is open, a second side surface positioned closer to an inside than the first side surface and of which an outer end portion is positioned closer to a rear side than the inner end portion of the first side surface, and a stepped surface that connects an inner edge of the first side surface to an outer edge of the second side surface and faces the outside.

Abstract: In a pneumatic tire, an intermediate land portion is provided with a plurality of lug grooves having acute bent portions and a plurality of sipes extending in a direction that intersects with the lug grooves. The lug grooves are disposed so as not to overlap one another in the tire circumferential direction, and each have one end that opens to an outer main groove and an other end that terminates in the intermediate land portion. When pitches, which serve as reference positions, are defined based on end points at which the lug grooves open to the outer main groove, the sipes each are disposed to be located inside one of the pitches, and the groove area ratio in the pitches in the intermediate land portion is in the range from 15% to 25%.

Abstract: A pneumatic tire includes first main grooves formed on outer sides, in the lateral direction, of a first land including an equatorial plane and extending in the circumferential direction; second main grooves outside, in the lateral direction, of the first main grooves and extending in the circumferential direction; auxiliary grooves formed on second lands between the first main grooves and the second main grooves, opening to the second main grooves, and terminating in the second lands; and first sipes inclined identically to the auxiliary grooves and crossing the second lands. The auxiliary grooves are formed into a shape bending at a bend point, and include a first portion extending from an opening end to the bend point, and a second portion extending from the bend point to a terminating end. A groove width of the first portion gradually reduces from the opening end to the bend point.

Abstract: A tread portion of a pneumatic tire includes a pair of first main grooves extending in a tire circumferential direction formed at a position on either outer side in the tire lateral direction of a first land portion including a tire equatorial plane; a pair of second main grooves extending in the tire circumferential direction formed at a position outward from the first main grooves in the tire lateral direction; and first lug grooves formed in a second land portion between the first main grooves and the second main grooves, the first lug grooves opening to one of the first main grooves at one end and opening to one of the second main grooves at an other end. The first lug grooves have a groove width of 2 mm or greater and have the same inclination direction in the tire lateral direction with respect to the tire circumferential direction.