Abstract: In a tire tread pattern, inclined grooves extend from a starting end in a center region including an equator toward both sides in a width direction and toward the same side in a circumferential direction to a pattern end. A periphery distance from the equator to the pattern end at an outer side in the width direction being 100%, in ranges separated from the starting end by ?35%, from >35% to ?50%, from >50% to ?70% and from >70% to ?100%, an inclination angle of the inclined grooves relative to the circumferential direction is from >40° to ?50°, from >50° to ?65°, from >65° to ?80°, and from >80° to ?90°, respectively. A circumferential-direction distance from the starting end to a terminating end of the inclined grooves is 60% to 90% of a width-direction distance.

Abstract: A ground contact region of the tread portion of a studdable tire includes a center region located over a range corresponding to a length of 5 to 25% of a ground contact width from a tire centerline on each of both sides of the tire centerline in a tire width direction; and two shoulder regions located on both sides of the center region in the tire width direction. In each of the center region and the shoulder regions, a plurality of the stud pin installation holes are disposed along each of four or more pin arrangement lines extending in a tire circumferential direction. An average value of adjacent intervals between the pin arrangement lines in the center region is larger than an average value of adjacent intervals between the pin arrangement lines in each of the shoulder regions.

Abstract: In a pneumatic tire, an elongation at break (EB) of carcass cords constituting a carcass layer satisfies a condition of EB?15%. A tread portion includes a pair of center main grooves each extending in a tire circumferential direction with a tire equator line interposed therebetween, and a center land portion defined by the pair of center main grooves. A ratio (Wc/Wb) of a width (Wc) of the center land portion to a width (Wb) of a widest belt within a belt layer in the tire width direction satisfies a condition of 0.10?Wc/Wb?0.20. An elongation at break (EB) of the carcass cords and the ratio (Wc/Wb) of the width (Wc) of the center land portion to the width (Wb) of the widest belt satisfy a condition of 350?10×1/(Wc/Wb)+20×EB?900.

Abstract: A pneumatic tire is provided. A carcass layer includes carcass cords formed of organic fiber cords obtained by intertwining a filament bundle of organic fibers, and includes turn-up portions formed by turning up end portions of a pair of bead portions to an outer side in a tire width direction. The carcass cords have an elongation at break (EB) satisfying EB?15%. A portion of a belt layer located in a width range of 10% of a width of a second widest belt in the belt layer on each of a left side and a right side of a tire equator line in a tire width direction has a belt angle (?c) satisfying 0.349 rad??c?0.56 rad. The elongation at break (EB) of the carcass cords and the belt angle (?c) satisfy 800<1140×?c+20×EB<1400.

Abstract: A carcass layer of a pneumatic lire includes carcass cords of organic fiber cords obtained by intertw ining a filament bundle of organic fibers, and includes turn-up portions formed by turning back end portions of the carcass layer at bead portions toward an outer side in a width direction. The carcass cords have an elongation at break (EB) satisfying EB?15%. An averagetotal gauge (GC)of a center land portion located within a width of 10% of a width of a second widest belt in a belt layer on right and left sides of an equatorial plane in the width direction, an average thickness(SG) of a sound absorptive member inside the pneumatic tire and located within a range identical to that of the center land portion, and the elongation at break (EB) of the carcass cords satisfy 15?GC/(GC+SG/10)×EB (%)?25.

Abstract: A pneumatic tire includes at least one carcass layer between bead portions on an inner side in a radial direction of sidewall portions on both sides of a tread portion extending in a circumferential direction and having an annular shape, and the carcass layer includes carcass cords formed of organic fiber cords obtained by intertwining a filament bundle of organic fibers. The carcass layer includes turn-up portions formed by being turned back at an end portion of the bead portions to an outer side in a tire width direction. The carcass cords have an elongation at break EB satisfying EB?15%, a cap tread rubber compound of the tread portion has a 300% modulus MD satisfying 4 MPa?MD?13 MPa, and the elongation at break EB and the 300% modulus MD satisfy 600?40×MD+20×EB (%)?1300.

Abstract: A carcass layer of a run-flat tire includes a carcass cord formed by twisting together organic fibers, wherein a breaking elongation Eb of the carcass cord, an average thickness Gs of a sidewall between a tire maximum width position of the sidewall and a position separated from the tire maximum width position to the outer side in a tire radial direction by a length equivalent to 15% of a tire cross-section height, and an average thickness Gsh in a tread between a shoulder position where a straight line orthogonal to the carcass layer and passing through a maximum width belt layer maximum width position intersects a surface of the tread and a position separated from the shoulder position toward the inner side in the tire width direction by a length equivalent to 15% of a maximum width belt layer maximum width satisfy: Eb?20%; Gsh?10 mm; Gs?9 mm; and 60%?Eb·Gsh/Gs?18%.

Abstract: Provided is a pneumatic tire including a tread portion having a ground contact surface configured to contact a road surface. The tread portion includes at least one groove that opens to the ground contact surface. The groove includes a projecting region provided with a plurality of fine projections that project from a groove wall surface facing space within the groove so as to be distributed in a point manner. A ratio H/L1 of a projection height H of the fine projection from the groove wall surface and a groove depth L1 of the groove from the ground contact surface is from 0.01 to 0.09. A ratio W/L2 of a width W of the fine projection orthogonal to a projection direction of the fine projection and a groove width L2 of the groove is from 0.002 to 0.02.

Abstract: A ground contact region of the tread portion of a studdable tire includes a center region located over a range corresponding to a length of 5 to 25% of a ground contact width from a tire centerline on each of both sides of the tire centerline in a tire width direction; and two shoulder regions located on both sides of the center region in the tire width direction. In each of the center region and the shoulder regions, a plurality of the stud pin installation holes are disposed along each of four or more pin arrangement lines extending in a tire circumferential direction. An average value of adjacent intervals between the pin arrangement lines in the center region is larger than an average value of adjacent intervals between the pin arrangement lines in each of the shoulder regions.