A pneumatic tire includes a tread portion 16, a sidewall portion 14, a buttress portion 18, and a hollow portion 50. A cross-sectional shape of a bottom surface of the hollow portion 50 is a curved shape in which a plurality of arcs having different radii of curvature are disposed in a tire radial direction and adjacent arcs are connected at a contact point C where the adjacent arcs have a common tangent line, or is a shape in which a plurality of arcs having different radii of curvature are connected by a straight line connecting contact points where the adjacent arcs have a common tangent line. An outside end 32a, in the tire radial direction, of a sidewall rubber 32 provided on the sidewall portion 14 is located on an outside Ro in the tire radial direction from the groove bottom 36B1 of the shoulder main groove 36B.

Embodiments of the disclosure include a pneumatic tire having improved high speed limits while generally maintaining wear, traction, and handling performance. Said tires include a cap ply extending substantially across a full width of at least one of the belt plies and being arranged at least partially within each shoulder, the cap ply forming a layer of elastomeric material reinforced with a plurality of elongate reinforcements spaced apart in an array, the cap ply being characterized as having a rupture force greater than 210 N per 15 mm of the cap ply width. In each shoulder area of said tires, the tread is characterized as being flatter and having a greater tread thickness.

Embodiments of the disclosure include a pneumatic tire having improved high speed limits while generally maintaining wear, traction, and handling performance. Said tires include a cap ply extending substantially across a full width of at least one of the belt plies and being arranged at least partially within each shoulder, the cap ply forming a layer of elastomeric material reinforced with a plurality of elongate reinforcements spaced apart in an array, the cap ply being characterized as having a rupture force greater than 210 N per 15 mm of the cap ply width. In each shoulder area of said tires, the tread is characterized as being flatter and having a greater tread thickness.

Provided is a pneumatic tire with a surface provided with a reflective layer that reflects light, the reflective layer including a transparent globule group composed of transparent globules. At least some of the transparent globules are each configured to reflect incident light incident into the transparent globule from outside, at an interface with the outside of the transparent globule, and to emit the light to the outside of the transparent globule as reflected light. The transparent globules are each configured to cause the reflected light to include more amount of non-retroreflected light than retroreflected light, the non-retroreflected light moving further away from an optical path of the incident light according to a distance from the transparent globules, being increased. The transparent globules each have an optical path of the non-retroreflected light with an angle difference of from 2.0 degrees to 2.5 degrees from the optical path of the incident light.

Provided is a pneumatic tire with a surface provided with a reflective layer that reflects light, the reflective layer including a transparent globule group composed of transparent globules. At least some of the transparent globules are each configured to reflect incident light incident into the transparent globule from outside, at an interface with the outside of the transparent globule, and to emit the light to the outside of the transparent globule as reflected light. The transparent globules are each configured to cause the reflected light to include more amount of non-retroreflected light than retroreflected light, the non-retroreflected light moving further away from an optical path of the incident light according to a distance from the transparent globules, being increased. The transparent globules each have an optical path of the non-retroreflected light with an angle difference of from 2.0 degrees to 2.5 degrees from the optical path of the incident light.

In a tire having composite grooves provided on a shoulder land portion, dry performance and wet performance are improved. The tire includes a tread portion 2. The tread portion 2 includes a first shoulder land portion 13. The first shoulder land portion 13 has shoulder lateral grooves 15 and shoulder composite grooves 20. The shoulder lateral grooves 15 and the shoulder composite grooves 20 are each curved so as to be convex in a tire circumferential direction. Each shoulder composite groove 20 includes, in a cross section thereof, a sipe element 21 having a width not greater than 1.5 mm and extending from a tread surface of the first shoulder land portion 13 in a tire radial direction, and a groove element 22 connected to an inner side in the tire radial direction of the sipe element 21 and having a width greater than 1.5 mm.

In a tire having composite grooves provided on a shoulder land portion, dry performance and wet performance are improved. The tire includes a tread portion 2. The tread portion 2 includes a first shoulder land portion 13. The first shoulder land portion 13 has shoulder lateral grooves 15 and shoulder composite grooves 20. The shoulder lateral grooves 15 and the shoulder composite grooves 20 are each curved so as to be convex in a tire circumferential direction. Each shoulder composite groove 20 includes, in a cross section thereof, a sipe element 21 having a width not greater than 1.5 mm and extending from a tread surface of the first shoulder land portion 13 in a tire radial direction, and a groove element 22 connected to an inner side in the tire radial direction of the sipe element 21 and having a width greater than 1.5 mm.

In a tire, first and second center land portions each include a circumferential narrow groove and first and second lateral grooves. The first and second lateral grooves of the first center land portion are disposed overlapped with each other in a tire circumferential direction. The first and second lateral grooves of the second center land portion are disposed overlapped with each other in the tire circumferential direction. The first and second lateral grooves of the first center land portion are disposed offset with respect to the first and second lateral grooves of the second center land portion in the tire circumferential direction.

In a pneumatic tire having a point-symmetric structure block pattern, narrow and wide outer blocks having different outer end positions in the lateral direction are alternately arranged in the circumferential direction. Among side blocks provided in a side region, large and small blocks are disposed respectively on the outer sides of the narrow and wide outer blocks in the lateral direction. The lateral and side grooves are continuous such that the groove width of the side groove connected to the wide portion of the lateral groove where the outer block converges toward the inner side in the radial direction, and the groove width of the side portion connected to the narrow portion of the lateral groove where the outer block widens toward the inner side in the radial direction, and the side block is tapered with an inner portion block width in the radial direction converges toward the wide portion.

In a pneumatic tire having a point-symmetric structure block pattern, narrow and wide outer blocks having different outer end positions in the lateral direction are alternately arranged in the circumferential direction. Among side blocks provided in a side region, large and small blocks are disposed respectively on the outer sides of the narrow and wide outer blocks in the lateral direction. The lateral and side grooves are continuous such that the groove width of the side groove connected to the wide portion of the lateral groove where the outer block converges toward the inner side in the radial direction, and the groove width of the side portion connected to the narrow portion of the lateral groove where the outer block widens toward the inner side in the radial direction, and the side block is tapered with an inner portion block width in the radial direction converges toward the wide portion.