JP7347008B2 - tire - Google Patents

Description

TECHNICAL FIELD The present invention relates to tires, and more particularly to tires for vehicles.

Patent Document 1 below proposes a tire in which a center land portion is provided with center siping and a center vertical shallow groove. The center siping and the center vertical shallow groove help maintain wet performance.

Japanese Patent Application Publication No. 2015-229408

Since the tire as described above is divided into a large number of block pieces by the center siping and the center longitudinal and shallow groove, there is a problem in that uneven wear is likely to occur. On the other hand, the shoulder land portion is inherently prone to wear, and improvements have been sought.

The present invention was devised in view of the above-mentioned problems, and the main object of the present invention is to provide a tire that can improve the uneven wear resistance of the crown land portion and shoulder land portion while ensuring wet performance. There is.

The present invention provides a tire having a tread portion, wherein the tread portion includes a shoulder main groove and a crown main groove adjacent to the shoulder main groove on the tire equator side, and a shoulder land portion including a tread edge; The shoulder land portion is separated from a crown land portion adjacent to the shoulder land portion, and the crown land portion is provided with a crown minor groove extending continuously in the tire circumferential direction and a plurality of crown lateral grooves extending in the tire axial direction, The crown minor groove has a groove width smaller than the shoulder main groove, and the crown lateral groove has an outer groove portion in the tire radial direction that opens at the tread surface of the crown land portion, and an outer groove portion extending inward in the tire radial direction from the outer groove portion. The shoulder land portion is provided with a shoulder minor groove that extends continuously in the tire circumferential direction and a plurality of shoulder lateral grooves that extend in the tire axial direction. The groove width is smaller than that of the shoulder main groove, and the width of the shoulder land portion in the tire axial direction is larger than the width of the crown land portion in the tire axial direction.

In the tire of the present invention, the width of the shoulder land portion in the axial direction of the tire is preferably 1.25 to 1.35 times the width of the crown land portion in the axial direction of the tire.

In the tire of the present invention, it is preferable that the crown lateral groove includes a first portion that curves convexly in the circumferential direction of the tire, and a second portion that curves convexly in the tire circumferential direction on the opposite side of the first portion. .

In the tire of the present invention, the first portion is preferably provided on the crown main groove side, and the second portion is preferably provided on the shoulder main groove side.

In the tire of the present invention, it is desirable that the first portion and the second portion are continuous through the crown minor groove.

In the tire of the present invention, the depth of the crown lateral groove is preferably 0.70 to 0.85 times the depth of the shoulder main groove.

In the tire of the present invention, the groove width of the crown lateral groove is preferably 4.0 mm or less.

In the tire of the present invention, the depth of the outer groove portion is preferably 0.05 to 0.10 times the depth of the shoulder main groove.

In the tire of the present invention, the crown land portion includes a first corner portion divided by a groove wall of the shoulder main groove and a groove wall of the crown lateral groove, and the first corner portion is chamfered. desirable.

In the tire of the present invention, it is desirable that the crown sub-groove extends linearly in parallel to the tire circumferential direction.

In the tire of the present invention, the groove width of the crown minor groove is preferably 2.0 to 3.0 mm.

In the tire of the present invention, the depth of the crown minor groove is preferably 0.15 to 0.30 times the depth of the shoulder main groove.

In the tire of the present invention, the shoulder lateral groove includes a first shoulder lateral groove extending from the shoulder minor groove toward the shoulder main groove, and a second shoulder lateral groove extending from the shoulder minor groove toward the tread end side; It is desirable that the second shoulder lateral groove communicates with the shoulder minor groove at a different position in the tire circumferential direction from the first shoulder lateral groove.

In the tire of the present invention, the groove width of the shoulder lateral groove is preferably 1.0 to 1.5 mm.

In the tire of the present invention, the depth of the shoulder lateral groove is preferably 0.10 to 0.25 times the depth of the shoulder main groove.

In the tire of the present invention, it is preferable that the shoulder minor groove extends in a zigzag or wavy manner in the tire circumferential direction.

In the tire of the present invention, the groove width of the shoulder minor groove is preferably 2.0 to 3.0 mm.

In the tire of the present invention, the depth of the shoulder minor groove is preferably 0.15 to 0.30 times the depth of the shoulder main groove.

The crown land portion of the tire of the present invention is provided with a crown minor groove that extends continuously in the tire circumferential direction and a plurality of crown lateral grooves that extend in the tire axial direction. The crown lateral groove includes an outer groove portion in the tire radial direction that opens at the tread surface of the crown land portion, and a sipe portion extending inward in the tire radial direction from the outer groove portion. Further, the shoulder land portion is provided with a shoulder minor groove that extends continuously in the tire circumferential direction and a plurality of shoulder lateral grooves that extend in the tire axial direction. These grooves provide sufficient groove volume and groove edges to provide excellent wet performance.

In the tire of the present invention, the width of the shoulder land portion in the tire axial direction is configured to be larger than the width of the crown land portion in the tire axial direction. As a result, the ground pressure of the crown land portion is reduced, and the uneven wear resistance of the crown land portion is improved. Further, by configuring the shoulder land portion to have a large width, the movement of the shoulder land portion during driving is suppressed, and the uneven wear resistance of the shoulder land portion is also improved.

FIG. 1 is a developed view of a tread portion of a tire according to an embodiment of the present invention. 2 is an enlarged view of the crown land portion of FIG. 1. FIG. 3 is a sectional view taken along line AA in FIG. 2. FIG. FIG. 2 is an enlarged view of the shoulder land portion of FIG. 1. FIG.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
FIG. 1 shows a developed view of the tread portion 2 of the tire 1 of this embodiment. The tire 1 of this embodiment is suitably used, for example, as a pneumatic tire for heavy loads. However, the tire of the present invention is not limited to this embodiment.

As shown in FIG. 1, the tread portion 2 of the tire 1 is provided with a plurality of main grooves that extend continuously in the tire circumferential direction. For example, each main groove extends linearly in parallel to the tire circumferential direction. Each main groove may extend, for example, in a zigzag shape or in a wave shape. The main grooves of this embodiment include, for example, a pair of shoulder main grooves 3 and a crown main groove 4 disposed between them. The shoulder main groove 3 is arranged on the tread end Te side, and the crown main groove 4 is adjacent to the shoulder main groove 3 on the tire equator C side.

In the case of a pneumatic tire, the "tread edge Te" is the camber when a regular load is applied to the tire 1, which is assembled on a regular rim (not shown) and filled with the regular internal pressure, and is in a regular state with no load. This is the axially outermost position of the tire when it touches the ground on a flat surface at an angle of 0°. In this specification, unless otherwise specified, the dimensions of each part of the tire are values measured under normal conditions.

A "regular rim" is a rim defined for each tire by the standard in the standard system that includes the standard on which the tire is based, for example, "Standard rim" for JATMA, "Design Rim" for TRA, For ETRTO, it is "Measuring Rim".

"Regular internal pressure" is the air pressure specified for each tire by each standard in the standard system including the standard on which the tire is based, and for JATMA it is the "maximum air pressure", and for TRA it is the air pressure specified in the table "TIRE LOAD LIMITS AT". The maximum value listed in "VARIOUS COLD INFLATION PRESSURES" is "INFLATION PRESSURE" for ETRTO.

"Regular load" is the load specified for each tire by each standard in the standard system including the standard on which the tire is based, and for JATMA it is "maximum load capacity", and for TRA it is the load specified in the table "TIRE LOAD LIMITS". The maximum value listed in "AT VARIOUS COLD INFLATION PRESSURES" is "LOAD CAPACITY" for ETRTO.

It is desirable that the distance L1 in the tire axial direction from the tire equator C to the groove center line of the shoulder main groove 3 is, for example, 0.20 to 0.30 times the tread width TW. The tread width TW is the distance in the tire axial direction from one tread end Te to the other tread end Te in the normal state.

For example, one crown main groove 4 is provided on the tire equator C. However, the present invention is not limited to this embodiment, and one crown main groove 4 may be provided on each side of the tire equator C.

The groove width of each main groove is preferably, for example, 4 to 7% of the tread width TW. The groove depth of each main groove is preferably, for example, 10 to 20 mm.

In this embodiment, the groove width W1 of the shoulder main groove 3 is larger than the groove width W2 of the crown main groove 4. The groove width W1 of the shoulder main groove 3 is, for example, 1.05 to 1.10 times the groove width W2 of the crown main groove 4. Such shoulder main groove 3 helps ensure wet performance.

The tread portion 2 is divided into a shoulder land portion 5 including the tread end Te and a crown land portion 6 adjacent to the shoulder land portion 5 by providing the above-mentioned main groove. The shoulder land portion 5 is divided between the shoulder main groove 3 and the tread end Te. The crown land portion 6 is divided between the shoulder main groove 3 and the crown main groove 4.

FIG. 2 shows an enlarged view of the crown land portion 6. As shown in FIG. 2, the width W3 of the crown land portion 6 in the tire axial direction is, for example, 0.10 to 0.25 times the tread width TW (shown in FIG. 1, the same applies hereinafter). be.

The crown land portion 6 is provided with a crown sub-groove 10 that extends continuously in the tire circumferential direction and a plurality of crown lateral grooves 11 that extend in the tire axial direction.

The crown sub-groove 10 of this embodiment, for example, extends linearly in parallel to the tire circumferential direction. Further, the crown sub-groove 10 is arranged at the center of the crown land portion 6 in the tire axial direction. Specifically, the crown sub-groove 10 is provided at the center position of the crown land portion 6 in the tire axial direction.

The crown minor groove 10 has a groove width smaller than that of the shoulder main groove 3. The groove width W4 of the crown sub-groove 10 of this embodiment is, for example, 4.0 mm or less, and preferably 2.0 to 3.0 mm. Further, the crown minor groove 10 has a smaller depth than the shoulder main groove 3. The depth of the crown minor groove 10 of this embodiment is, for example, 0.50 times or less, and preferably 0.15 to 0.30 times the depth of the shoulder main groove 3.

The crown lateral groove 11 extends, for example, from the crown main groove 4 to the shoulder main groove 3. Thereby, the crown lateral groove 11 intersects with the crown minor groove 10.

FIG. 3 shows a cross-sectional view taken along line AA of the crown lateral groove 11 of FIG. As shown in FIG. 3, the crown lateral groove 11 includes an outer groove portion 12 in the tire radial direction that opens at the tread surface of the crown land portion 6, and a sipe portion 13 extending inward in the tire radial direction from the outer groove portion 12. Such crown lateral grooves 11 can ensure wet performance while maintaining the rigidity of the crown land portion 6.

FIG. 4 shows an enlarged view of the shoulder land portion 5. As shown in FIG. 4, the shoulder land portion 5 is provided with a shoulder sub-groove 15 that extends continuously in the tire circumferential direction and a plurality of shoulder lateral grooves 16 that extend in the tire axial direction.

The shoulder minor groove 15 has a groove width smaller than that of the shoulder main groove 3. The groove width W5 of the shoulder sub-groove 15 of this embodiment is, for example, 4.0 mm or less, and preferably 2.0 to 3.0 mm. Further, the shoulder minor groove 15 has a smaller depth than the shoulder main groove 3. The depth of the shoulder minor groove 15 of this embodiment is, for example, 0.50 times or less, and preferably 0.15 to 0.30 times the depth of the shoulder main groove 3.

In the tire of the present invention, each of the grooves described above provides sufficient groove volume and groove edges to provide excellent wet performance. Further, in the tire of the present invention, the width W6 of the shoulder land portion 5 in the tire axial direction is configured to be larger than the width W3 of the crown land portion 6 in the tire axial direction (shown in FIG. 2). As a result, the ground pressure of the crown land portion 6 is reduced, and the uneven wear resistance of the crown land portion 6 is improved. Further, by configuring the shoulder land portion 5 to have a large width, the movement of the shoulder land portion 5 during running is suppressed, and the uneven wear resistance of the shoulder land portion 5 is also improved.

In order to further improve the uneven wear resistance performance of each land portion, the width W6 of the shoulder land portion 5 in the tire axial direction is 1.25 to 1.35 times the width W3 of the crown land portion 6 in the tire axial direction. is desirable.

As shown in FIG. 2, the crown lateral groove 11 extends, for example, in an S-shape. The crown lateral groove 11 of this embodiment includes a first portion 21 that curves convexly in the tire circumferential direction, and a second portion 22 that curves convexly on the opposite side of the first portion 21 in the tire circumferential direction. The first portion 21 is provided closer to the crown main groove 4 than the crown sub-groove 10, and the second portion 22 is provided closer to the shoulder main groove 3 than the crown sub-groove 10 is. The first portion 21 and the second portion 22 are continuous through the crown minor groove 10. Such crown lateral grooves 11 are useful for improving wet performance and uneven wear resistance performance in a well-balanced manner.

By including the first portion 21 and the second portion 22 described above, the end portion 11a of the crown lateral groove 11 on the shoulder main groove 3 side is inclined with respect to the tire axial direction and communicates with the shoulder main groove 3.

The amplitude amount A1 (peak-to-peak amplitude amount) of the crown lateral groove 11 in the tire circumferential direction is smaller than the groove width W1 (shown in FIG. 1) of the shoulder main groove 3, for example. The amplitude amount A1 is preferably 0.60 to 0.80 times the groove width W1 of the shoulder main groove 3.

The radius of curvature of the first portion 21 and the second portion 22 is preferably, for example, 0.35 to 0.45 times the width W3 of the crown land portion 6 in the tire axial direction. More preferably, the first portion 21 and the second portion 22 have the same radius of curvature. Such a crown lateral groove 11 helps to suppress heel-and-toe wear.

The groove width W7 of the crown lateral groove 11 is, for example, 4.0 mm or less, and preferably 2.5 to 3.5 mm. Such crown lateral grooves 11 are useful for improving uneven wear resistance while ensuring wet performance.

As shown in FIG. 3, in the crown lateral groove 11 of this embodiment, for example, two groove walls in the sipe portion 13 extend in parallel to the tire radial direction. Further, one groove wall of the crown lateral groove 11 extends in parallel to the tire radial direction from the groove bottom to the tread surface of the crown land portion 6, and the other groove wall of the crown lateral groove 11 extends in the tire radial direction in the outer groove portion 12. The groove is curved in a direction that widens the groove width toward the outside. Thereby, the width of the sipe portion 13 is configured to be smaller than the width of the outer groove portion 12. The width of the sipe portion 13 is, for example, 1.0 mm or less, preferably 0.5 to 1.0 mm.

The depth d1 of the crown lateral groove 11 (the depth from the tread surface of the crown land portion 6 to the bottom of the sipe portion 13) is 0.50 times or more the depth of the shoulder main groove 3, preferably 0.70 to 0. .85 times. Such a crown lateral groove 11 can exhibit high wet performance while suppressing uneven wear.

The depth d2 of the outer groove portion 12 is, for example, 0.25 times or less, and preferably 0.05 to 0.10 times the depth of the shoulder main groove 3. Such an outer groove part 12 can exhibit excellent uneven wear resistance performance over a long period of time while ensuring wet performance at the time of starting use of the tire.

As shown in FIG. 1, the crown lateral grooves 11 provided on one crown land portion 6 and the crown lateral grooves 11 provided on the other crown land portion 6 are arranged in the crown main groove 11 at different positions in the tire circumferential direction. It is desirable that it be connected to. This arrangement of the crown lateral grooves 11 helps to further improve uneven wear resistance.

As shown in FIG. 2, the crown land portion 6 includes a crown block 23 divided by a plurality of crown lateral grooves 11. It is desirable that the length L2 of the crown block 23 in the tire circumferential direction is smaller than the width W3 of the crown land portion 6 in the tire axial direction. Specifically, the length L2 of the crown block 23 is 0.70 to 0.90 times the width W3 of the crown land portion 6. Thereby, the rigidity of the crown block 23 in the tire circumferential direction is optimized, and heel-and-toe wear is effectively suppressed.

The crown land portion 6 includes a first corner portion 18a and a second corner portion 18b that are separated by the groove wall of the shoulder main groove 3 and the groove wall of the crown lateral groove 11. The first corner portion 18a is a corner portion where the angle between the groove wall of the shoulder main groove 3 and the groove wall of the crown lateral groove 11 is an acute angle. The second corner portion 18b is a corner portion where the angle between the groove wall of the shoulder main groove 3 and the groove wall of the crown lateral groove 11 is an obtuse angle. As a desirable aspect, in this embodiment, the first corner portion 18a is chamfered. This suppresses uneven wear at each corner.

As shown in FIG. 4, the shoulder sub-groove 15 is arranged, for example, at the center of the shoulder land portion 5 in the tire axial direction. Specifically, the center position of the shoulder land portion 5 in the tire axial direction and the shoulder sub groove 15 intersect at least partially with the center position of the shoulder land portion 5 in the tire axial direction.

The shoulder sub-groove 15 extends, for example, in a zigzag or wave shape in the tire circumferential direction. The shoulder minor groove 15 alternately includes first curved portions 26 convexly curved toward the shoulder main groove 3 side and second curved portions 27 convexly curved toward the tread end Te side in the tire circumferential direction.

The amplitude amount A2 of the shoulder sub-groove 15 in the tire axial direction (peak-to-peak amplitude amount) is, for example, smaller than the amplitude amount A1 of the crown lateral groove 11 (shown in FIG. 2). Specifically, the amplitude amount A2 is 0.60 to 0.80 times the amplitude amount A1. This further improves the uneven wear resistance of each land portion.

For example, the shoulder lateral groove 16 is inclined with respect to the tire axial direction. For example, the shoulder lateral groove 16 is inclined in the same direction as the end 11a of the crown lateral groove 11 on the shoulder main groove 3 side. The angle of the shoulder lateral groove 16 with respect to the tire axial direction is, for example, 5 to 15 degrees.

The groove width W8 of the shoulder lateral groove 16 is smaller than the groove width W7 (shown in FIG. 2) of the crown lateral groove 11, for example. Further, the groove width W8 of the shoulder lateral groove 16 is smaller than the width W4 of the crown minor groove 10 and the groove width W5 of the shoulder minor groove 15. Specifically, the groove width W8 of the shoulder lateral groove 16 is 1.0 to 1.5 mm. Thereby, the rigidity of the shoulder land portion 5 is maintained, and uneven wear thereof is suppressed.

From the same point of view, the depth of the shoulder lateral groove 16 is 0.50 times or less, preferably 0.10 to 0.25 times, the depth of the shoulder main groove 3.

The shoulder lateral groove 16 includes a first shoulder lateral groove 16A extending from the shoulder minor groove 15 toward the shoulder main groove 3, and a second shoulder lateral groove 16B extending from the shoulder minor groove 15 toward the tread end Te side. The second shoulder lateral groove 16B communicates with the shoulder minor groove 15 at a different position in the tire circumferential direction from the first shoulder lateral groove 16A. This further improves uneven wear resistance.

The first shoulder lateral groove 16A of this embodiment extends from the first curved portion 26 of the shoulder minor groove 15 to the shoulder main groove 3. In a more desirable aspect, the first shoulder lateral groove 16A communicates with the apex of the first curved portion 26 on the shoulder main groove 3 side.

The second shoulder lateral groove 16B of this embodiment extends from the second curved portion 27 of the shoulder sub-groove 15 to the tread end Te. In a more desirable embodiment, the second shoulder lateral groove 16B communicates with the apex of the second curved portion 27 on the tread end Te side.

In a further desirable aspect, the depth of the second shoulder lateral groove 16B is smaller than the depth of the first shoulder lateral groove 16A. Specifically, the depth of the second shoulder lateral groove 16B is 0.75 to 0.95 times the depth of the first shoulder lateral groove 16A. Thereby, uneven wear near the tread end Te of the shoulder land portion 5 is suppressed.

Although the tire of one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described specific embodiment, and can be implemented by changing various aspects.

A tire of size 225/70R19.5 having the basic pattern shown in FIG. 1 was prototyped based on the specifications shown in Table 1. As Comparative Examples 1 and 2, tires were prototyped in which the width of the shoulder land portion was the same as or smaller than the width of the crown land portion. The tires of Comparative Examples 1 and 2 have the same configuration as the tire shown in FIG. 1 except for the above-mentioned configuration. Wet performance and uneven wear resistance of each test tire were tested. The common specifications and test methods for each test tire are as follows.
Mounted rim: 19.5 x 6.00
Tire internal pressure: 660kPa
Test vehicle: 2-D car Tire installation position: All wheels

<Wet performance>
The above test vehicle entered an asphalt road surface with a water film of 2 mm depth at 65 km/h, applied sudden braking, and measured the braking distance. The result is the reciprocal of the braking distance, and is expressed as an index with the value of Comparative Example 1 being 100. The larger the value, the better the wet performance.

<Uneven wear resistance performance>
When the test tire was run for a certain distance, the appearance of wear on the crown land portion and shoulder land portion was visually evaluated. The results are scores based on the appearance of Comparative Example 1 as 100, and the larger the value, the better the uneven wear resistance performance is.
The results of the tests are shown in Tables 1 and 2.

As a result of the test, it was confirmed that the tire of the example had improved uneven wear resistance performance of the crown land portion and shoulder land portion while ensuring wet performance.

2 Tread portion 3 Shoulder main groove 4 Crown main groove 5 Shoulder land portion 6 Crown land portion 10 Crown minor groove 11 Crown lateral groove 12 Outer groove portion 13 Sipe portion 15 Shoulder minor groove 16 Shoulder lateral groove Te Tread end

Claims (16)

A tire having a tread portion,
The tread portion is divided into a shoulder land portion including a tread edge and a crown land portion adjacent to the shoulder land portion by a shoulder main groove and a crown main groove adjacent to the tire equator side of the shoulder main groove. and
The crown land portion is provided with a crown minor groove that extends continuously in the tire circumferential direction and a plurality of crown lateral grooves that extend in the tire axial direction,
The crown minor groove has a groove width smaller than the shoulder main groove,
The crown lateral groove includes an outer groove portion in the tire radial direction that opens at the tread surface of the crown land portion, and a sipe portion extending inward in the tire radial direction from the outer groove portion,
The shoulder land portion is provided with a shoulder minor groove that extends continuously in the tire circumferential direction and a plurality of shoulder lateral grooves that extend in the tire axial direction,
The shoulder minor groove has a groove width smaller than the shoulder main groove,
The width of the shoulder land portion in the tire axial direction is 1.25 to 1.35 times the width of the crown land portion in the tire axial direction.
tire. A tire having a tread portion,
The tread portion is divided into a shoulder land portion including a tread edge and a crown land portion adjacent to the shoulder land portion by a shoulder main groove and a crown main groove adjacent to the tire equator side of the shoulder main groove. and
The crown land portion is provided with a crown minor groove that extends continuously in the tire circumferential direction and a plurality of crown lateral grooves that extend in the tire axial direction,
The crown minor groove has a groove width smaller than the shoulder main groove,
The crown lateral groove includes an outer groove portion in the tire radial direction that opens at the tread surface of the crown land portion, and a sipe portion extending inward in the tire radial direction from the outer groove portion,
The shoulder land portion is provided with a shoulder minor groove that extends continuously in the tire circumferential direction and a plurality of shoulder lateral grooves that extend in the tire axial direction,
The shoulder minor groove has a groove width smaller than the shoulder main groove,
The width of the shoulder land portion in the tire axial direction is larger than the width of the crown land portion in the tire axial direction,
The crown lateral groove includes a first portion that curves convexly in the tire circumferential direction, and a second portion that curves convexly on the opposite side of the first portion in the tire circumferential direction.
tire. The first portion is provided on the crown main groove side,
The tire according to claim 2, wherein the second portion is provided on the shoulder main groove side. The tire according to any one of claims 1 to 3, wherein the depth of the crown lateral groove is 0.70 to 0.85 times the depth of the shoulder main groove. The tire according to any one of claims 1 to 4, wherein the crown lateral groove has a groove width of 4.0 mm or less. The tire according to any one of claims 1 to 5, wherein the depth of the outer groove portion is 0.05 to 0.10 times the depth of the shoulder main groove. The crown land portion includes a first corner portion divided by a groove wall of the shoulder main groove and a groove wall of the crown lateral groove,
The tire according to any one of claims 1 to 6, wherein the first corner portion is chamfered. The tire according to any one of claims 1 to 7, wherein the crown sub-groove extends linearly in parallel to the tire circumferential direction. The tire according to any one of claims 1 to 8, wherein the crown minor groove has a groove width of 2.0 to 3.0 mm. The tire according to any one of claims 1 to 9, wherein the depth of the crown minor groove is 0.15 to 0.30 times the depth of the shoulder main groove. The shoulder lateral groove includes a first shoulder lateral groove extending from the shoulder minor groove toward the shoulder main groove, and a second shoulder lateral groove extending from the shoulder minor groove toward the tread end,
The tire according to any one of claims 1 to 10, wherein the second shoulder lateral groove communicates with the shoulder minor groove at a different position in the tire circumferential direction than the first shoulder lateral groove. The tire according to any one of claims 1 to 11, wherein the shoulder lateral groove has a groove width of 1.0 to 1.5 mm. The tire according to any one of claims 1 to 12, wherein the depth of the shoulder lateral groove is 0.10 to 0.25 times the depth of the shoulder main groove. The tire according to any one of claims 1 to 13, wherein the shoulder minor groove extends in a zigzag or wave shape in the tire circumferential direction. The tire according to any one of claims 1 to 14, wherein the shoulder minor groove has a groove width of 2.0 to 3.0 mm. The tire according to any one of claims 1 to 15, wherein the depth of the shoulder minor groove is 0.15 to 0.30 times the depth of the shoulder main groove.

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