There is provided a non-pneumatic tire (1) including: an attachment body (11) that is attached to an axle; a ring-shaped body (13) that surrounds the attachment body (11) from an outside in a tire radial direction, a plurality of connection members (15) that are disposed between the attachment body (11) and the ring-shaped body (13) along a tire peripheral direction and connect the attachment body (11) and the ring-shaped body (13) to each other, and a cylindrical tread member (16) that is externally mounted on the ring-shaped body (13), in which the ring-shaped body (13) and the connection member (15) are integrally formed by a injection molding in which a molding material is injected from the connection member (15) side toward the ring-shaped body (13) side, in which the tread member (16) includes a base rubber portion (41) that is positioned at an inside in the tire radial direction and a cap rubber portion (42) that is positioned at an outside of the base rubber portion (41) in the tire radial direction, in which rigidity of the base rubber portion (41) is lower than rigidity of the cap rubber portion (42), and in which the base rubber portion (41) is disposed at least in a portion positioned between the connection members (15) adjacent to each other in the tire peripheral direction in the ring-shaped body (13).

Recycled elements and/or renewable resources, such as recycled carbon black or recycled carbon black and recycled particulate rubber, are incorporated into a rubber composition. The rubber composition can be used to manufacture tires or various tire components including tire subtreads.

A pneumatic tire includes a carcass layer, a belt layer disposed outward of the carcass layer, a tread rubber disposed outward of the belt layer in a tire radial direction, sidewall rubbers disposed outward of the carcass layer in a tire width direction, and protectors disposed in regions from tire ground contact edges to maximum tire width positions and protruding from tire profiles. The protectors have a rubber hardness Hs_p in a range of 50≦Hs_p≦60, an elongation at break Eb_p in a range of 500%≦Eb_p≦700%, and an elastic modulus E_p in a range of 3.4 MPa≦E_p≦7.0 MPa.

A pneumatic tire of the present disclosure includes, on a tread surface, circumferential main grooves extending in a tire circumferential direction and land portions defined between circumferential main grooves adjacent in a tire width direction among the circumferential main grooves or by the circumferential main grooves and tread edges. The land portions include widthwise grooves extending in the tire width direction and are divided into blocks by the widthwise grooves. At least one widthwise sipe extending in the tire width direction is included within the blocks. Hard rubber with a higher elastic modulus than that of tread rubber is disposed in a tire radial region including at least an opening to the tread surface of a wall defining the widthwise sipe. Microfabrication is applied in a region of the tread surface surrounding at least a portion of the opening of the widthwise sipe to the tread surface.

In a tire, a tread includes a cap layer, an intermediate layer formed such that a loss tangent of the intermediate layer at 30° C. is less than a loss tangent of the cap layer at 30° C., and a base layer formed such that a loss tangent of the base layer at 30° C. is less than the loss tangent of the intermediate layer at 30° C. The intermediate layer is disposed outwardly of the base layer and the cap layer is disposed outwardly of the intermediate layer, in the radial direction. An outer end of the intermediate layer is disposed outwardly of an outer end of the base layer and an outer end of the cap layer is disposed inwardly of the outer end of the intermediate layer, in the axial direction. A difference between an axial width of the cap layer and an axial width of the base layer is not less than −10 mm and not greater than 10 mm.

An object of the invention is to provide a tire having little change in riding comfort performance and wet performance before and after wear of the tread part and in which riding comfort performance and wet performance as when the tire is newly used are maintained. The fire comprises a tread being composed of a rubber layer in which there is little change in hardness after thermal deterioration and having a groove shape such that a sea ratio after wear with respect to a sea ratio as when the tire is newly used is within a predetermined range.

An object of the invention is to provide a tire having good steering stability performance after wear and in which a decrease in wet performance after wear is suppressed. The tire comprises a tread being composed of a rubber layer in which change in hardness after thermal deterioration is within a predetermined range and having a groove shape such that a sea ratio after wear with respect to a sea ratio as when the tire is newly used.

In this pneumatic tire, a tan δ value T20 of a rubber member, which constitutes at least one of a bead filler, an undertread, a sidewall rubber, and a rim cushion rubber, at 20° C. and a tan δ value T60 of the rubber member at 60° C. satisfy 0.50≤T20/T60≤2.00 and T20≤0.22. Additionally, the tan δ value T20 of the rubber member at 20° C. is in a range T20≤0.15. Additionally, a tan δ value T20_sw of the sidewall rubber at 20° C. and a tan δ value T60_sw of the sidewall rubber at 60° C. satisfy 0.50≤T20_sw/T60_sw≤1.50 and T20_sw≤0.11.

Provided is a tire comprising a tread, wherein a ratio of a tire weight G (kg) to a maximum bad capacity W.sub.L (kg) of the tire (G/W.sub.L) is 0.0150 or less, wherein the tread has at least one rubber layer formed of a rubber composition comprising a rubber component and a reinforcing filler, and wherein a tan at 30° C. of the rubber composition is 0.15 or less, and a complex elastic modulus at 30° C. (E*.sub.30) of the rubber composition is 8.0 MPa or less.

A tire comprises a tread portion having a tread surface and buttress surfaces. The buttress surfaces have inclinations such that the tread edges shift axially outwards as the tread portion is worn off. The tread rubber includes a radially outermost first rubber layer and a radially inner second rubber layer. The loss tangent δ2 of the second rubber layer is larger than the loss tangent δ1 of the first rubber layer. One of or each of the buttress surfaces is provided with an outer lateral groove. The outer lateral groove is located axially outside the tread edge when the tire is new, and when the tread portion is worn off and the tread edge shifts axially outward, the outer lateral groove is at least partially located axially inward of the tread edge.