Provided is a motorcycle tire having improved wet performance during straight running without compromising other performances. The motorcycle tire is a motorcycle tire whose rotation direction when mounted on a vehicle is designated. A main groove (10) at least including a first groove (11) and a second groove (12) having different inclination directions, and a sub groove (20) are provided on a tire tread, the main groove and the sub groove are alternately repeatedly formed in the tire circumferential direction line symmetrically with respect to the tire equator and are arranged offset in the tire circumferential direction between one side and the other side in the tire width direction, and the main groove and the sub groove include, per one pitch of pattern on one side in the tire width direction within the contact region S during straight running, two or more outward grooves extending obliquely from the tire equator side to the outside in the tire width direction toward the designated reverse rotation direction of the rotation direction and one or more inward grooves extending obliquely from the outside in the tire width direction to the tire equator side toward the designated reverse rotation direction of the rotation direction.

An off-road pneumatic tire has a tread having an outer surface forming a tread surface, the tread including a body and multiple blocks projecting from the body substantially outward in radial direction. The blocks have a center block group, a pair of shoulder block groups and a pair of middle block groups. The center group includes center blocks at interval in circumferential direction on plane of equator. Each shoulder group includes shoulder blocks at interval in the circumferential direction on an edge of the tread surface. Each middle group includes middle blocks at interval in the circumferential direction between the center and one shoulder groups. The center group has units each having first, second, third and fourth center blocks in the order of the first, second, third and fourth blocks in the circumferential direction.

Tire (1) for a motorized two-wheeled vehicle of the motorbike type. A good compromise between the stability of the motorbike in a straight line at high speed and the stability of the motorbike in a curved path with a high camber angle is achieved with reinforcers of a first carcass layer (61) that form, with the circumferential direction (XX′), an angle (A.sub.1) at most equal to 75°, the reinforcers of a second carcass layer (62) form, with the circumferential direction, an angle (A.sub.2) at least equal to 80° and at most equal to 90°, the difference between the angles (A1, A2) of the respective reinforcers of the first and second carcass layers (61, 62) is at least equal to 10° and at most equal to 20° and the angles (A1, A2) of the respective reinforcers of the first and second carcass layers (61, 62) are oriented in the same direction.

A motorcycle tyre has a tread band (8) comprising a plurality of grooves that form a tread pattern including a module (T) replicated along a circumferential direction of the tyre (1) and having a predetermined circumferential length (C1). The module (T) comprises a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (1). Such circumferential grooves (20) extend along the circumferential direction of the tyre (1) for only part of said predetermined circumferential length (C1) and define between them a central portion (A) of tread band (8) having a void to solid ratio substantially equal to zero and a predetermined axial width (A1). The module (T) further comprises a plurality of transversal grooves (30, 31, 32, 33) arranged on opposite sides with respect to the equatorial plane (X-X) at a distance from said equatorial plane (X-X) greater than that of said circumferential grooves (20) and a pair of first lateral annular portions (B) axially arranged between said circumferential grooves (20) and said plurality of pairs of transversal grooves (30, 31, 32, 33), each of said first lateral annular portions (B) comprising, in a position axially adjacent to the respective circumferential groove (20), a respective part (B1) of tread band having a circumferential length at least equal to that of said circumferential grooves (20) and a void to solid ratio substantially equal to zero. The tyre (1) has a curvature ratio lower than about 0.32.

A pneumatic tire excellent in high speed stability and turning ability is provided. In a band of a tire, a center portion located in an axial center has a helically wound structure in which a first band body including a first cord is wound. A shoulder portion located on an axial outside of the center portion has a meshed structure formed by a second band body including a second cord. The shoulder portion includes a plurality of first portions, a plurality of second portions and a plurality of third portions. Each first portion is inclined and extends from an axially inner end of the shoulder portion to an axially outer end of the shoulder portion. Each second portion is inclined in an opposite direction from the first portion and extends from the axially inner end of the shoulder portion to the axially outer end of the shoulder portion.

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre.

A tire includes a tread portion including a tire equator, a tread edge located axially outwardly of the tire equator, and at least one block. The at least one block includes a ground contact top surface having an axially extending first edge, and a first sidewall surface extending radially inwardly from the first edge. The first sidewall surface includes an axially inner portion located on the tire equator side and an axially outer portion located on the tread edge side. A maximum inclined angle of the inner portion with respect to a tire normal is greater than a maximum inclined angle of the outer portion with respect to a tire normal.

Provided is a pneumatic motorcycle tire which includes a tread portion, and side wall portions and bead portions, and whose rotation direction when the tire is mounted on a vehicle is designated. A tire tread includes a branched main groove composed of a first groove extending inclined toward the designated tire rotation direction on one side in the tire width direction, a second groove extending from an end portion of the first groove in the reverse rotation direction of the designated tire rotation direction inclined toward the designated tire rotation direction on the other end in the tire width direction, and a third groove extending from an end portion of the first groove and second groove in the reverse rotation direction of the designated tire rotation direction toward the reverse rotation direction of the designated tire rotation direction, wherein a connecting portion of the first groove and the second groove is formed in a curved shape, the first groove and the second groove are formed in a curved line having the center of the radius of curvature on the side of the reverse rotation direction of the designated tire rotation direction, and the third groove is formed in a curved line having the center of the radius of curvature on the side of the tire center portion.

A motorcycle tire includes a tread portion, a carcass, a breaker layer disposed outside the carcass with cords oriented at an angle equal to or more than 15 degrees with respect to a tire equator, and a tread rubber disposed outside the breaker layer so as to form a band-less structure in which the tread rubber is arranged so as to be directly in contact with the breaker layer. The tread rubber includes a cap rubber layer forming a ground contacting surface of the tread portion, and a base rubber layer disposed inside the cap rubber layer and having complex modulus greater than that of the cap rubber layer. The base rubber layer extends between a pair of outermost ends thereof so as to across the tire equator, and a thickness of the base rubber layer at the tire equator is greater than that of the outermost ends.

A motorcycle tire that improves straight-line traction performance and also improves turning performance is provided. In a motorcycle tire, a condition of LC/T≦0.08 is satisfied for center blocks, a condition of LM/LC>1.0 is satisfied for the center blocks and intermediate blocks, and the center blocks and the intermediate blocks are either separate from each other in the tire circumferential direction, or overlap each other in the tire circumferential direction with an overlap region of 0.5 LC or less.