Abstract: A tire for a two-wheeled motor vehicle has a tread (2) including: a center region (Cr); a pair of middle regions (Mr) located on both sides of the center region (Cr); and a pair of inner shoulder regions (Sr) located on both sides of the middle regions (Mr). The tread (2) has provided therein: inner tilted grooves (10) having outer ends (10e) provided within the middle regions (Mr); and outer tilted grooves (11) having inner ends (11i) provided within the middle regions (Mr). The groove area ratio of the center region (Cr) is from 34% to 39%, the groove area ratio of the middle regions (Mr) is from 14% to 19%, and the groove area ratio of the inner shoulder regions (Sr) is from 14% to 19%.

Abstract: A tire for a motorbike can improve turning performance and dry grip performance with good balance. In a tire for a motorbike, a tread part is provided with a first inclined groove and a second inclined groove disposed closer to a tread end than is the first inclined groove. The first inclined groove is provided to a forward-movement grounded area. An inner end of the second inclined groove is provided in an area within a range 2% of a tread expansion radius centered about an end edge of the forward-movement grounded area. An outer end of the second inclined groove is provided to a position displaced from the inner end of the second inclined groove toward the tread end by an interval 20%-30% of the tread expansion radius.

Abstract: A motorcycle tire improved in transient characteristics when leaned is disclosed, wherein the tread portion has a unidirectional tread pattern comprising: inside oblique main grooves disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the intended rotational direction (R) at an angle of 5 to 30 degrees with respect to the circumferential direction, and each having an inner end (Ai) at a distance of 0 to 30% of the half tread width (W) from the tire equator; and outside oblique main grooves 11 disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the counter-rotational direction at an angle of 10 to 60 degrees with respect to the circumferential direction, and each having an inner end (Bi) axially inside the outer end (Ao).

Abstract: A tire bead carcass member manufacturing step includes a ply turning-up step, a ply layering step, and a ply turning-down step. In the ply turning-down step, an outer circumferential surface 32a of a ply layered body 32 is supported. While the ply layered body 32 is rotated, a turning-down stitcher 38 turns down axial end portions of a second ply around beads from the radially outer side toward the radially inner side. While the ply layered body 32 is rotated, a layering stitcher 40 operates so as to layer the axial end portions of the second ply having been turned down to an inner side of the ply layered body 32, over an inner circumferential surface of a first ply, to form the bead carcass member.

Abstract: A tire for a two-wheeled motor vehicle has a tread (2) including: a center region (Cr); a pair of middle regions (Mr) located on both sides of the center region (Cr); and a pair of inner shoulder regions (Sr) located on both sides of the middle regions (Mr). The tread (2) has provided therein: inner tilted grooves (10) having outer ends (10e) provided within the middle regions (Mr); and outer tilted grooves (11) having inner ends (11i) provided within the middle regions (Mr). The groove area ratio of the center region (Cr) is from 34% to 39%, the groove area ratio of the middle regions (Mr) is from 14% to 19%, and the groove area ratio of the inner shoulder regions (Sr) is from 14% to 19%.

Abstract: A tire for a motorbike can improve turning performance and dry grip performance with good balance. In a tire for a motorbike, a tread part is provided with a first inclined groove and a second inclined groove disposed closer to a tread end than is the first inclined groove. The first inclined groove is provided to a forward-movement grounded area. An inner end of the second inclined groove is provided in an area within a range 2% of a tread expansion radius centered about an end edge of the forward-movement grounded area. An outer end of the second inclined groove is provided to a position displaced from the inner end of the second inclined groove toward the tread end by an interval 20%-30% of the tread expansion radius.

Abstract: A motorcycle tire includes a tread portion having a first region and a second region divided by the tire equator, with the tread portion being provided with first inner inclined grooves provided in the first region and second inner inclined grooves provided in the second region, first and second inner inclined grooves alternately arranged in a tire circumferential direction, the inner inclined groove extending from an axially inner end Ai toward an anti-designated rolling direction to an axially outer end Ao at an angle ? of 0-20 to the tire circumferential direction, and first outer inclined grooves provided in the first region and second outer inclined grooves provided in the second region, and first and second outer inclined grooves alternately arranged in the tire circumferential direction, the outer inclined groove extending from an axially inner end Bi toward a designated rolling direction to an axially outer end Bo.

Abstract: There are provided a composite which is formed of a component (a) or a component (b) and a component (c), or the component (a) or the component (b) and a component (d), and is suitable for various uses such as an electrically-conductive material, (a) oxidized form thin film particles which are obtained by oxidizing graphite, have a carbon skeleton, have a thickness of 0.4 nm to 10 nm and a planar-direction size of at least 20 nm and have lyophilic to a liquid having a relative dielectric constant of at least 15, (b) reduced form thin film particles obtained by partially or completely reducing the above thin film particles so as to have an oxygen content of 0 to 35 wt %, (c) a macromolecule as a matrix component, and (d) low molecular-weight parts which bond a plurality of the thin film particles by a covalent bond, a process for the production of the composite, and a method for reducing oxidized form thin film particles.

Abstract: There are provided a composite which is formed of a component (a) or a component (b) and a component (c), or the component (a) or the component (b) and a component (d), and is suitable for various uses such as an electrically-conductive material, (a) oxidized form thin film particles which are obtained by oxidizing graphite, have a carbon skeleton, have a thickness of 0.4 nm to 10 nm and a planar-direction size of at least 20 nm and have lyophilic to a liquid having a relative dielectric constant of at least 15, (b) reduced form thin film particles obtained by partially or completely reducing the above thin film particles so as to have an oxygen content of 0 to 35 wt %, (c) a macromolecule as a matrix component, and (d) low molecular-weight parts which bond a plurality of the thin film particles by a covalent bond, a process for the production of the composite, and a method for reducing oxidized form thin film particles.