Provided is a tire comprising, a shoulder land portion includes a width direction groove, the width direction groove comprises a first width direction groove portion that communicates with the circumferential groove, and a second width direction groove portion adjacent to and continuous with a tread ground contact edge side of the first width direction groove portion, the first width direction groove portion includes a narrowed groove portion in a region of at least a part of the first width direction groove portion in an extending direction of the first width direction groove portion, and respective groove widths of the circumferential groove, the first width direction groove portion and the second width direction groove portion satisfy a relational expression the groove width of the circumferential groove>the groove width of the first width direction groove portion>the groove width of the second width direction groove portion.

A tire has a tread having a first tread edge, a second tread edge on the opposite side, and multiple inclined main grooves formed such that each inclined main groove is obliquely extending from one of the first and second tread edges toward a tire equator and is terminated without reaching the other one of the first and second tread edges. The inclined main grooves are formed such that each of the inclined main grooves includes a tire axial direction outer side portion obliquely extending in an inclined direction, a tire axial direction inner side portion inclining in the inclined direction, and a middle portion formed between the tire axial direction outer side portion and the tire axial direction inner side portion and inclining in the opposite inclined direction with respect to the inclined direction of the tire axial direction outer side portion and tire axial direction inner side portion.

Provided is a pneumatic tire in which circumferential narrow grooves are disposed at a tire width direction disposal density of from 0.06 grooves/mm to 0.2 grooves/mm. Width direction narrow grooves include at least one bent portion. The bent portion has a bend angle of not less than 40 and not more than 160.

A tire comprises a tread portion comprising a first tread portion defined between a tire equator C and a first tread edge. The first tread portion is provided with a crown main groove extending continuously and straight in a tire circumferential direction on a side of the tire equator C and oblique main grooves extending from the first tread edge toward the tire equator C to cross the crown main groove to form oblique land regions each defined between adjacent oblique main grooves. At least one oblique land region is provided with an inner oblique sub-groove extending from the oblique main groove and terminating within the oblique land region on an axially outer side of the crown main groove and an outer oblique sub-groove connecting between the oblique main grooves adjacent to both sides of the oblique land region on the axially outer side of the inner oblique sub-groove.

A pneumatic tire includes: a zigzag circumferential direction groove that is formed in a tread portion by alternating and continuously formed first inclined portions and second inclined portions, the first inclined portions being inclined with respect to a tire circumferential direction and the second inclined portions being inclined in the opposite direction to the first inclined portions with respect to the tire circumferential direction; first lug grooves that are inclined in the same direction as the first inclined portions with respect to the tire circumferential direction and that merge with the first inclined portions; and second lug grooves that are inclined in the opposite direction to the first inclined portions with respect to the tire circumferential direction and that intersect the first inclined portions.

A tire includes having a tread portion that has three land portions defined by two crown main grooves that continuously extend in a tire circumferential direction and that are arranged across a tire equator. The three land portions include two shoulder land portions. At least one of the shoulder land portions includes a plurality of main inclined grooves that extend so as to be inclined. At least one of the main inclined grooves has an inner end and an outer end. The main inclined groove has a steeply-inclined portion that extends so as to be inclined from the inner end toward a tread end, and a gently-inclined portion that extends across the tread end from the outer end at an angle, relative to an tire axial direction, which is less than an angle of the steeply-inclined portion relative thereto. A length of the steeply-inclined portion is greater than a length of the gently-inclined portion.

There is provided a pneumatic tire which exhibits excellent durability while improving driving comfort. A pneumatic tire includes: a buttress portion; and a plurality of circumferential grooves formed on the buttress portion and extending in a tire circumferential direction. A ridge extending in the tire circumferential direction is formed in each of the plurality of circumferential grooves. A length of the ridge is not smaller than 50% of a length of the circumferential groove in the tire circumferential direction.

A motorcycle pneumatic tire includes a tread portion including a crown region, a pair of middle regions and a pair of shoulder regions upon a tread development width of the tread portion being divided equally into five regions. The tread portion is provided with a pair of circumferentially and continuously extending crown main grooves within the crown region to include a tire equator therebetween and a plurality of inclined grooves each extending from the crown region to the shoulder region in each side of the tire equator without communicating with the crown main grooves. Each of the inclined grooves includes a straight portion extending straightly in the middle region and an arc portion extending in an arc shape in the shoulder region while increasing an angle with respect to a circumferential direction of the tire axially outwardly.

A tread portion of a pneumatic tire is divided into a center region at a center portion in a tire width direction and shoulder regions disposed on both sides of the center region. Each of the center region includes ribs which are formed by a plurality of main grooves extending in a tire circumferential direction. The shoulder region includes: a plurality of inclined grooves which are inclined toward the outside in a tire width direction and toward a direction opposite to a tire rotational direction at the time of advancing a vehicle; and a shoulder block surrounded by the inclined grooves.

A tire having a tread portion with: zigzag shoulder main grooves having a trapezoidal wave form comprising first and second circumferential segments and first and second oblique segments; and shoulder axial grooves extending from the shoulder main grooves beyond the tread edges. The shoulder axial grooves are respectively smoothly continued to the first oblique segments or the second oblique segments so as to form composite shoulder axial grooves whose groove widths are smoothly increased toward the axially outside of the tire.