The present invention relates to a tire tread comprising a tread cap comprising at least one tread cap rubber compound, at least three circumferential grooves, wherein at least portions of the sidewalls and the bottom of each of said grooves are formed by a circumferential groove reinforcement, and wherein a first groove reinforcement of a groove laterally next to the equatorial plane of the tire comprises a first reinforcement rubber compound which has a higher hardness than the tread cap rubber compound, and wherein a second groove reinforcement of a groove with a larger lateral distance to the equatorial plane of the tire than the first groove, comprises a second reinforcement rubber compound which has a higher hardness than the tread cap rubber compound and a lower hardness than the second reinforcement rubber compound.

The present invention provides methods for surface-modifying a rubber vulcanizate or a thermoplastic elastomer, which can cost-effectively provide a variety of functions, such as sliding properties, according to the application. The present invention relates to a method for surface-modifying a rubber vulcanizate or a thermoplastic elastomer as a target for modification, the method including: step 1 of forming polymerization initiation points on a surface of the modification target; and step 2 of radically polymerizing a non-functional monomer, starting from the polymerization initiation points, to grow non-functional polymer chains, and then radically polymerizing a fluoropolyether segment-containing functional monomer to grow functional polymer chains.

The present invention is provided with: a mounting body mounted on an axle; a ring-shaped body (13) surrounding the mounting body from an outside in a tire radial direction; a connecting member (15) configured to connect the mounting body and the ring-shaped body (13) such that the mounting body and the ring-shaped body (13) are displaceable; and a cylindrical tread member (16) mounted over the ring-shaped body (13), wherein grooves (51, 52) are formed at an outer peripheral surface of a portion located above and corresponding to a portion of the tread member (16) at which the ring-shaped body (13) and the connecting member (15) are connected.

A pneumatic tire includes, on a tread surface, a plurality of circumferential main grooves extending in the tread circumferential direction, and a plurality of land portions defined by circumferential main grooves adjacent in the tread width direction among the plurality of circumferential main grooves, or by the circumferential main grooves and tread edges. A widthwise groove (widthwise sipe) (circumferential sipe) includes a widened portion, on the groove bottom side (sipe bottom side), at which the groove width (sipe width) is larger than on the tread surface side. In a tire radial direction region including at least a reference depth position, the storage modulus of first tread rubber, which is a groove wall surface layer defined by the widened portion and covering at least part of the widened portion, is larger than the storage modulus of second tread rubber located in a region around the first tread rubber.

A pneumatic tire for use on trucks, the tire comprising: a tread which includes a belt reinforcement structure, the belt structure including a pair of working belts, wherein the angle of the working belts range from about 10 degrees to about 50 degrees, and wherein the first working belt has an angle of the reinforcements different that the angle of the belt reinforcements of the second working belt. The belt package further includes a low angle belt that is preferably positioned between of the working belts. The pneumatic tire further includes a tread having a groove reinforced with a tread compound having a tensile at break greater than 18 MPa, and an elongation at break greater than 450%.

Provided is a thin film with good durability that is easy to handle during storage and use. The film contains, as a rubber component, at least a copolymer having a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit, and having a proportion of a butylene unit of 0 mol %, where a filler content is 15 parts by mass or less with respect to 100 parts by mass of the rubber component, no cross-linking agent is contained, and the thickness is 300 μm or less.

A tire having a tread comprising at least two radially superposed portions which comprise a radially external portion being made of a first rubber composition (FC), and a radially internal portion being made of a second rubber composition (SC); the tread comprising a plurality of tread pattern elements (1) delimited by cut-outs (3, 4); the tread pattern elements (1) respectively comprising at least one lateral face (13, 14, 15, 16) and a contact surface (2) intended to come into contact with the ground during rolling; the external portion of the tread pattern elements (1) being at least partially covered on at least one of the lateral face(s) (13, 14, 15, 16) with a layer of a third rubber composition (TC).

A tire comprises a fluorescent rubber composition based on at least an elastomer matrix, a reinforcing filler comprising between 0 and 50 phr of carbon black and between 2.5 and 15 phr of a fluorescent pigment.

A tire having an axis of rotation and a median plane (CP) perpendicular to the axis of rotation, and comprising: a crown reinforcement, a tread positioned radially on the outside of the crown reinforcement and axially between two shoulders, comprising a contact face intended to come into contact with the roadway while the tire is being driven on, wherein the tread is primarily made up of at least one rubber compound of given dynamic shear modulus M and comprises a plurality of furrows oriented substantially circumferentially, each furrow having a furrow bottom, and a sub-layer disposed radially on the outside of the crown reinforcement and radially on the inside of the tread, wherein the sub-layer is made up of at least one rubber compound of given dynamic shear modulus A is flush with each furrow bottom.

A tire comprises a tread portion 2. The tread portion 2 includes a tread ground contacting surface (2s) and at least one main groove 3 recessed from the tread ground contacting surface (2s) and extending continuously in a tire circumferential direction. The main groove 3 has a first groove wall 11. The first groove wall is provided with a recessed portion 15 recessed outwardly in a groove width direction from a groove edge of the main groove 3 on the tread ground contacting surface. The recessed portion 15 is formed of groove wall rubber 8 having a complex elastic modulus larger than that of base rubber 7 forming a main portion of the tread ground contacting surface (2s).