tire

Abstract

To provide a tire that improves noise performance while maintaining wet performance and hydroplaning-proof performance.SOLUTION: Provided is a tire with a tread part 2. The tread part 2 includes tread ends Te, shoulder circumferential direction grooves 5 continuously extending in a tire circumferential direction, and shoulder land parts 6 partitioned therebetween. On the side of the shoulder circumferential direction grooves 5 of the shoulder land parts 6, a plurality of recesses 9 having a blocked contour shape in the shoulder land parts 6 and aligned in a tire axial direction are disposed in a tire circumferential direction. On the outside of the tire axial direction of the recesses 9 of the shoulder land parts 6, a plurality of shoulder lateral grooves 10 extending to the tread ends Te from positions away from the recesses 9 in the tire axial direction are disposed in the tire circumferential direction. An interval of the recesses 9 in the tire axial direction aligned in the tire axial direction is 2 mm or more. An interval in the tire axial direction between the shoulder lateral grooves 10 and the recesses 9 is 2 mm or more.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tire. [Background technology]

[0002] For example, Patent Document 1 below proposes a pneumatic tire having a plurality of shoulder lateral grooves in a shoulder land portion, which is expected to improve wet performance by the shoulder lateral grooves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-101804 A Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned shoulder lateral grooves cause air to enter and exit the grooves due to deformation when the tire touches the ground, generating an air pumping noise, which in turn causes deterioration of noise performance. In order to reduce the air pumping noise, it is effective to reduce the groove volume of the shoulder lateral grooves.

[0005] However, reducing the groove volume of the shoulder lateral grooves may result in deterioration of wet performance and hydroplaning resistance.

[0006] The present invention has been devised in view of the above circumstances, and has as its main object to provide a tire which has improved noise performance while maintaining wet performance and hydroplaning resistance. [Means for solving the problem]

[0007] The present invention is a tire having a tread portion, the tread portion including a tread edge, a shoulder circumferential groove extending continuously in the tire circumferential direction, and a shoulder land portion partitioned therebetween, at least one depression having a closed contour shape within the shoulder land portion is provided on the shoulder circumferential groove side of the shoulder land portion, and a shoulder lateral groove is provided on the axial outer side of the depression in the shoulder land portion, extending from a position axially spaced from the depression to the tread edge, and the axial distance between the shoulder lateral groove and the depression is 2 mm or more.

[0008] In the tire of the present invention, the shoulder land portion has a plurality of the recesses arranged in the tire circumferential direction and aligned in the tire axial direction, and it is desirable that the axial spacing between the recesses arranged in the tire axial direction is 2 mm or more.

[0009] In the tire of the present invention, the depth of the recess is desirably 4 mm or more.

[0010] In the tire of the present invention, the opening area of ​​one of the depressions is 4 to 60 mm 2 It is desirable that:

[0011] In the tire of the present invention, it is preferable that the shoulder lateral groove and the recess are provided at the same position in the tire circumferential direction.

[0012] In the tire of the present invention, it is preferable that the shoulder lateral groove and the recess are misaligned so as not to be aligned at the same position in the tire circumferential direction.

[0013] In the tire of the present invention, it is preferable that the contour shape of the depression in the contact surface of the shoulder land portion is a circle, an ellipse or a polygon.

[0014] In the tire of the present invention, it is preferable that the groove width of the shoulder lateral groove is equal to or greater than the length of the recess in the tire circumferential direction. Effect of the Invention

[0015] By adopting the above-mentioned configuration, the tire of the present invention can improve noise performance while maintaining wet performance and hydroplaning resistance. [Brief description of the drawings]

[0016] [Figure 1] 1 is a development view of a tread portion of a tire according to one embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged perspective view of a shoulder land portion of FIG. [Diagram 3] FIG. 2 is an enlarged plan view of a shoulder land portion of FIG. [Figure 4] FIG. 11 is an enlarged plan view of a shoulder land portion according to another embodiment of the present invention. [Diagram 5] FIG. 2 is an enlarged view of a shoulder land portion of the tire of Comparative Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a development view of a tread portion 2 of a tire 1 showing one embodiment of the present invention. The tire 1 of this embodiment is suitably used as a pneumatic tire for passenger cars, for example. However, the present invention is not limited to such an embodiment.

[0018] As shown in FIG. 1, the tread portion 2 includes a plurality of circumferential grooves 3 extending continuously in the tire circumferential direction between two tread ends Te, and a plurality of land portions separated by the circumferential grooves 3.

[0019] The two tread ends Te each correspond to the axially outermost contact positions when the tire 1 in a normal state is loaded with a normal load and contacts a flat surface with a camber angle of 0°.

[0020] "Normal condition" means, in the case of a pneumatic tire for which various standards are established, that the tire is mounted on a normal rim, inflated to the normal internal pressure, and no load is applied. In the case of a tire for which various standards are not established or a non-pneumatic tire, the normal condition means a standard use condition according to the intended use of the tire, and a state in which no load is applied. In this specification, unless otherwise specified, the dimensions of each part of the tire are values ​​measured in the normal condition.

[0021] A "genuine rim" is a rim that is defined for each tire by the standard system that includes the standard on which the tire is based. For example, in the case of JATMA, it is called a "standard rim," in the case of TRA, it is called a "Design Rim," and in the case of ETRTO, it is called a "Measuring Rim."

[0022] "Normal internal pressure" is the air pressure set for each tire by each standard in the standard system on which the tire is based. In the case of JATMA, it is the "maximum air pressure." In the case of TRA, it is the maximum value listed in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES." In the case of ETRTO, it is the "INFLATION PRESSURE."

[0023] In the case of a pneumatic tire for which various standards are established, the "normal load" is the load that each standard specifies for each tire in the standard system including the standard on which the tire is based. For JATMA, it is the "maximum load capacity", for TRA, it is the maximum value listed in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES", and for ETRTO, it is the "LOAD CAPACITY". In addition, in the case of a tire for which various standards are not established or a non-pneumatic tire, the "normal load" refers to the load acting on one tire in the standard mounting state of the tire. The "standard mounting state" refers to a state in which the tire is mounted on a standard vehicle according to the intended use of the tire, and the vehicle is stationary on a flat road surface in a drivable state.

[0024] The circumferential grooves 3 include, for example, two crown circumferential grooves 4 and two shoulder circumferential grooves 5 .

[0025] The two crown circumferential grooves 4 are provided so as to sandwich the tire equator C. The two shoulder circumferential grooves 5 are provided so as to sandwich the two crown circumferential grooves 4. The axial distance L1 from the groove center line of the crown circumferential groove 4 to the tire equator C is, for example, 5% to 15% of the tread width TW. The axial distance L2 from the groove center line of the shoulder circumferential groove 5 to the tire equator C is, for example, 20% to 35% of the tread width TW. The tread width TW is the axial distance from one tread end Te to the other tread end Te in the normal state.

[0026] Each circumferential groove 3 extends, for example, linearly in parallel to the tire circumferential direction. Each circumferential groove 3 may extend in a zigzag or wavy pattern in the tire circumferential direction.

[0027] The groove width W1 of the circumferential groove 3 is preferably, for example, 4.0% to 7.0% of the tread width TW. The depth (not shown) of the circumferential groove 3 is preferably, for example, 5.0 to 15.0 mm. However, the circumferential groove 3 is not limited to this embodiment.

[0028] The land portion of this embodiment includes a shoulder land portion 6, a middle land portion 7, and a crown land portion 8. The shoulder land portion 6 is defined between the tread end Te and the shoulder circumferential groove 5. The middle land portion 7 is defined between the shoulder circumferential groove 5 and the crown circumferential groove 4. The crown land portion 8 is defined between two crown circumferential grooves 4. The tire 1 of this embodiment is a so-called five-rib tire in which the tread portion 2 is composed of two shoulder land portions 6, two middle land portions 7, and one crown land portion 8. However, the tire 1 of the present invention is not limited to this embodiment, and may be, for example, a so-called four-rib tire in which the tread portion 2 is composed of two shoulder land portions 6 and two middle land portions 7.

[0029] FIG. 2 shows an enlarged perspective view of the shoulder land portion 6 in FIG. 1. FIG. 3 shows an enlarged plan view of the shoulder land portion 6 in FIG. 1. As shown in FIG. 2 and FIG. 3, at least one depression 9 having a closed contour shape within the shoulder land portion 6 is provided on the shoulder circumferential groove 5 side of the shoulder land portion 6. A shoulder lateral groove 10 is provided on the axial outer side of the depression 9 of the shoulder land portion 6, extending from a position axially spaced from the depression 9 to the tread end Te. The axial distance t1 between the shoulder lateral groove 10 and the depression 9 is 2 mm or more. The tire 1 of the present invention employs the above-mentioned configuration, thereby improving noise performance while maintaining wet performance and hydroplaning resistance performance. The following mechanism is presumed to be the reason for this.

[0030] In general, the closer the shoulder land portion 6 is to the tread edge Te, the smaller the ground pressure acting on the tread surface tends to be, and the closer the shoulder land portion 6 is to the shoulder circumferential groove 5, the larger the ground pressure acting on the tread surface tends to be. For this reason, when the shoulder lateral groove 10 is close to the shoulder circumferential groove 5 or when the shoulder lateral groove 10 is connected to the shoulder circumferential groove 5, deformation of the shoulder lateral groove 10 at the time of contact with the ground tends to become large, and the air pumping noise tends to become louder.

[0031] In the present invention, at least one recess 9 is provided on the shoulder circumferential groove 5 side of the shoulder land portion 6 where a relatively large ground pressure acts, and a shoulder lateral groove 10 is provided on the outside of the recess 9. This suppresses deformation of the shoulder land portion 6 on the shoulder circumferential groove 5 side. On the other hand, in the region on the tread end Te side of the shoulder land portion 6, the ground pressure acting thereon is small, so deformation of the shoulder lateral groove 10 is small. This action suppresses the generation of air pumping noise in the shoulder lateral groove 10, thereby improving noise performance.

[0032] On the other hand, since the shoulder circumferential groove 5 exhibits sufficient drainage, the hydroplaning resistance can be maintained even if the number of groove elements is reduced in the region of the shoulder land portion 6 on the shoulder circumferential groove 5 side. Also, in the region on the tread end Te side of the shoulder land portion 6, the shoulder lateral grooves 10 extending to the tread end Te exhibit sufficient drainage, and thus the hydroplaning resistance can be maintained.

[0033] Generally, in order to ensure wet performance, it is important to increase the ground pressure acting on the tread of the land portion and to push through the water film on the road surface. In the present invention, by providing at least one recess 9, the ground pressure acting on the shoulder land portion 6 is increased and wet performance is maintained. In addition, in the present invention, by specifying the interval t1 as 2 mm or more, the land portion wall between the recess 9 and the shoulder lateral groove 10 exerts a sufficient reinforcing effect, and wet performance is maintained while suppressing the generation of air pumping noise caused by the recess 9 and the shoulder lateral groove 10.

[0034] As described above, the present invention utilizes the difference in ground contact pressure between the inside and outside of the axial direction of the shoulder land portion 6 to achieve both noise performance, wet performance, and hydroplaning resistance, which have been considered to be contradictory performances in the past. In addition, the present invention is expected to have the effect of reducing rolling resistance because deformation in the area of ​​the shoulder land portion 6 on the shoulder circumferential groove 5 side is suppressed. In addition, in the present invention, the groove width of the shoulder lateral groove 10 can be set within an appropriate range because the recess 9 can compensate for wet performance, and thus heel-and-toe wear can be suppressed.

[0035] A more detailed configuration of this embodiment will be described below. Each configuration described below shows a specific aspect of this embodiment. Therefore, it goes without saying that the present invention can achieve the above-mentioned effects even if it does not have the configuration described below. In addition, even if any one of the configurations described below is applied alone to the tire of the present invention having the above-mentioned characteristics, an improvement in performance according to each configuration can be expected. Furthermore, when some of the configurations described below are applied in combination, a composite improvement in performance according to each configuration can be expected.

[0036] As shown in Fig. 3, the groove width W3 of the shoulder lateral groove 10 is, for example, 50% to 70% of the groove width W2 (shown in Fig. 1) of the shoulder circumferential groove 5. This improves wet performance and noise performance in a well-balanced manner. On the other hand, since the shoulder lateral groove 10 has a discontinuous end within the shoulder land portion 6, excessive deformation is suppressed, and heel-and-toe wear can be suppressed even with the above groove width.

[0037] The maximum depth of the shoulder lateral groove 10 is, for example, 50% to 100% of the maximum depth of the shoulder circumferential groove 5.

[0038] The shoulder lateral grooves 10 of this embodiment extend axially outward across the tread edge Te and open at the buttress surface. The axial length L3 of the shoulder lateral grooves 10 at the contact surface of the shoulder land portion 6 is 40% to 60% of the axial width W4 of the contact surface of the shoulder land portion 6. This makes it difficult for a large ground contact pressure to act on the shoulder lateral grooves 10, thereby reducing air pumping noise.

[0039] The angle of the shoulder lateral grooves 10 with respect to the tire axial direction is, for example, 15° or less, and desirably 5° or less. More desirably, the shoulder lateral grooves 10 of this embodiment extend parallel to the tire axial direction.

[0040] In this embodiment, the shoulder land portion 6 has a plurality of recesses 9 (two in this embodiment) arranged in the circumferential direction of the tire, which are aligned in the axial direction of the tire. The axial spacing t2 between the recesses 9 aligned in the axial direction of the tire is 2 mm or more. This allows the land portion walls sandwiched between the recesses 9 to exhibit a sufficient reinforcing effect, and makes it possible to maintain wet performance while suppressing the generation of air pumping noise caused by the recesses 9. However, the present invention is not limited to this embodiment, and the effects of the present invention can be expected as long as at least one recess 9 is arranged on the axially inner side of one shoulder lateral groove 10.

[0041] The axial distance t1 between the shoulder lateral groove 10 and the depression 9, and the axial distance t2 between the depressions 9 aligned in the tire axial direction serve to reinforce the shoulder land portion 6. Therefore, if the distances t1 and t2 are less than 2 mm, the reinforcing effect is reduced and the shoulder lateral groove 10 becomes more susceptible to deformation. On the other hand, if the distances t1 and t2 are excessively large, the wet performance may be impaired. Therefore, the distances t1 and t2 are, for example, 4 mm or less, and preferably 3 mm or less.

[0042] The contour shape of the recess 9 on the ground contact surface of the shoulder land portion 6 is a circle, an ellipse, or a polygon. In a preferred embodiment, the contour shape of the recess 9 in this embodiment is a rectangle.

[0043] In this embodiment, the opening area of ​​one recess 9 is 4 to 60 mm 2 The opening area is 4 mm 2 If the opening area is less than 60mm, the ground pressure will be small and there is a high possibility that wet performance will be deteriorated. 2 If the opening area of ​​the recess 9 exceeds 10 mm, the recess 9 itself may become a source of air pumping noise, resulting in a deterioration in noise performance. From the viewpoint of improving wet performance and noise performance in a well-balanced manner, the opening area of ​​the recess 9 is preferably 10 mm 2 More than 15mm, preferably 15mm 2 More than 35mm, preferably 2 Less than 25mm, preferably 2 The following is the result.

[0044] If the depth of the depression 9 is small, it may not be able to push through the water film on the road surface, and may also be worn away and disappear early. For this reason, the depth of the depression 9 is preferably 4 mm or more. On the other hand, if the depth of the depression 9 is large, it may lead to a deterioration in noise performance, so the depth of the depression 9 is preferably 6 mm or less.

[0045] The groove width W3 of the shoulder lateral groove 10 is preferably equal to or greater than the circumferential length L4 of the recess 9. This provides excellent wet performance and hydroplaning resistance. From the viewpoint of ensuring noise performance, the groove width W3 of the shoulder lateral groove 10 is preferably equal to or less than 200% of the circumferential length L4 of the recess, and more preferably equal to or less than 150%.

[0046] In this embodiment, it is preferable that the shoulder lateral groove 10 and the recess 9 are provided at the same position in the tire circumferential direction. This embodiment includes an embodiment in which a projected area of ​​the shoulder lateral groove 10 extended parallel to the tire axial direction overlaps with at least a part of the recess 9 in a plan view of the tread. In a preferable embodiment, 50% or more, more preferably 80% or more of the opening area of ​​the recess 9 overlaps with the projected area. As a further preferable embodiment, in this embodiment, the entire opening area of ​​the recess 9 overlaps with the projected area. This improves wet performance and noise performance in a well-balanced manner.

[0047] Fig. 4 shows an enlarged view of the shoulder land portion 6 of another embodiment. As shown in Fig. 4, the shoulder lateral grooves 10 and the recesses 9 may be offset so as not to be aligned at the same position in the tire circumferential direction. In other words, in this embodiment, in a plan view of the tread, the projection area of ​​the shoulder lateral grooves 10 extended parallel to the tire axial direction does not overlap the recesses 9 at all. Such an embodiment can shift the timing of contact between the recesses 9 and the shoulder lateral grooves 10, and can disperse the frequency band of the noise generated by the recesses 9 and the shoulder lateral grooves 10.

[0048] 3 and 4, the shoulder land portion 6 is not provided with any grooves or sipes other than the above-mentioned shoulder lateral grooves 10 and depressions 9. However, the present invention is not limited to such an embodiment, and other grooves and sipes may be provided in the shoulder land portion 6 as necessary.

[0049] As shown in FIG. 1, the middle land portion 7 and the crown land portion 8 in this embodiment are configured as smooth ribs without grooves or sipes, but grooves or sipes may be provided as necessary.

[0050] Although the tire according to one embodiment of the present invention has been described in detail above, the present invention is not limited to the above specific embodiment and can be modified and carried out in various aspects. EXAMPLES

[0051] A pneumatic tire of size 205 / 55R16 having the basic pattern of FIG. 1 was prototyped. As Comparative Example 1, a tire was prototyped in which only shoulder lateral grooves b extending from at least the tread end Te and terminated within the shoulder land portion a were provided in the shoulder land portion a, and no recesses were provided, as shown in FIG. 5. The total opening area of ​​the shoulder lateral grooves b in Comparative Example 1 is the same as the total opening area of ​​the shoulder lateral grooves and recesses in Example 1. The tire of Comparative Example 1 has substantially the same configuration as the tire of the Example, except for the above-mentioned points. The noise performance, wet performance, and hydroplaning resistance performance of each test tire were tested. The common specifications and test methods of each test tire are as follows. Rim: 16×6.5J Tire pressure: 200kPa Test vehicle: 1600cc, front-wheel drive Tire mounting position: All wheels

[0052] <Noise performance> The noise (air pumping sound of the shoulder lateral grooves) was measured when the test vehicle was driven on a dry road at a speed of 50 km / h. The results are expressed as an index with the reciprocal of the noise of Comparative Example 1 taken as 100, and the larger the value, the better the noise performance.

[0053] <Wet performance> The performance of the test vehicle when it was driven on a wet road surface (water film on the road surface was 1 mm or less) was evaluated by the driver's senses. The results are rated based on a score of 100 for Comparative Example 1, with a higher score indicating better wet performance.

[0054] <Hydroplaning resistance> The test vehicle was driven at high speed into a puddle of water with a thickness of 5 mm, and the hydroplaning occurrence speed was measured. The results are expressed as an index with the occurrence speed of Comparative Example 1 being 100, and the higher the value, the better the hydroplaning resistance. The test results are shown in Tables 1 and 2.

[0055] [Table 1]

[0056] [Table 2]

[0057] As shown in Tables 1 and 2, the test results confirmed that the tires of the examples had improved noise performance while maintaining wet performance and hydroplaning resistance.

[0058] As an index showing the overall performance including the wet performance, hydroplaning resistance, and noise performance, the total score of each evaluation item in Tables 1 and 2 may be used. As shown in Tables 1 and 2, it was also confirmed that the tires of the examples were excellent in the above-mentioned overall performance. [Explanation of symbols]

[0059] 2 Tread section 5 Shoulder circumferential groove 6 Shoulder Land Section 9. Depression 10 Shoulder groove Te tread edge

Claims

1. A tire having a tread portion, The tread portion includes a tread end, a shoulder circumferential groove extending continuously in a tire circumferential direction, and a shoulder land portion defined therebetween, At least one recess having a closed contour shape is provided in the shoulder land portion on the shoulder circumferential groove side, a shoulder lateral groove is provided on an outer side of the recess in the shoulder land portion in the tire axial direction, the shoulder lateral groove extending from a position spaced apart from the recess in the tire axial direction to the tread end, The distance in the tire axial direction between the shoulder lateral groove and the recess is 2 mm or more, The length L3 of the shoulder lateral groove in the tire axial direction on the ground contact surface of the shoulder land portion is 40% to 60% of the width W4 of the ground contact surface of the shoulder land portion in the tire axial direction, The shoulder land portion is provided with a plurality of the recesses arranged in the tire axial direction in the tire circumferential direction, The axial spacing between the recesses arranged in the tire axial direction is 2 mm or more. tire.

2. A tire having a tread portion, The tread portion includes a tread end, a shoulder circumferential groove extending continuously in a tire circumferential direction, and a shoulder land portion defined therebetween, At least one recess having a closed contour shape is provided in the shoulder land portion on the shoulder circumferential groove side, a shoulder lateral groove is provided on an outer side of the recess in the shoulder land portion in the tire axial direction, the shoulder lateral groove extending from a position spaced apart from the recess in the tire axial direction to the tread end, The distance in the tire axial direction between the shoulder lateral groove and the recess is 2 mm or more, The length L3 of the shoulder lateral groove in the tire axial direction on the ground contact surface of the shoulder land portion is 40% to 60% of the width W4 of the ground contact surface of the shoulder land portion in the tire axial direction, The groove width of the shoulder lateral groove is equal to or greater than the length of the recess in the tire circumferential direction. tire.

3. A tire having a tread portion, The tread portion includes a tread end, a shoulder circumferential groove extending continuously in a tire circumferential direction, and a shoulder land portion defined therebetween, At least one recess having a closed contour shape is provided in the shoulder land portion on the shoulder circumferential groove side, a shoulder lateral groove is provided on an outer side of the recess in the shoulder land portion in the tire axial direction, the shoulder lateral groove extending from a position spaced apart from the recess in the tire axial direction to the tread end, The distance in the tire axial direction between the shoulder lateral groove and the recess is 2 mm or more, The tire includes two shoulder land portions, Each of the two shoulder land portions is provided with the at least one recess and the shoulder lateral groove, The shoulder land portion is provided with a plurality of the recesses arranged in the tire axial direction in the tire circumferential direction, The axial spacing between the recesses arranged in the tire axial direction is 2 mm or more. tire.

4. A tire having a tread portion, The tread portion includes a tread end, a shoulder circumferential groove extending continuously in a tire circumferential direction, and a shoulder land portion defined therebetween, At least one recess having a closed contour shape is provided in the shoulder land portion on the shoulder circumferential groove side, a shoulder lateral groove is provided on an outer side of the recess in the shoulder land portion in the tire axial direction, the shoulder lateral groove extending from a position spaced apart from the recess in the tire axial direction to the tread end, The distance in the tire axial direction between the shoulder lateral groove and the recess is 2 mm or more, The tire includes two shoulder land portions, Each of the two shoulder land portions is provided with the at least one recess and the shoulder lateral groove, The groove width of the shoulder lateral groove is equal to or greater than the length of the recess in the tire circumferential direction. tire.

5. A tire as described in any one of claims 1 to 4, wherein the depth of the recess is 4 mm or more.

6. The tire according to claim 1, wherein the opening area of ​​each of the recesses is 4 to 60 mm 2 .

7. A tire as described in any one of claims 1 to 6, wherein the shoulder lateral groove and the recess are provided at the same position in the tire circumferential direction.

8. A tire as described in any one of claims 1 to 6, wherein the shoulder lateral groove and the recess are misaligned so as not to be aligned in the same position in the tire circumferential direction.

9. A tire as described in any one of claims 1 to 8, wherein the contour shape of the recess at the contact surface of the shoulder land portion is circular, elliptical, or polygonal.

10. A tire having a tread portion, The tread portion includes a tread end, a shoulder circumferential groove extending continuously in a tire circumferential direction, and a shoulder land portion defined therebetween, At least one recess having a closed contour shape is provided in the shoulder land portion on the shoulder circumferential groove side, a shoulder lateral groove is provided on an outer side of the recess in the shoulder land portion in the tire axial direction, the shoulder lateral groove extending from a position spaced apart from the recess in the tire axial direction to the tread end, The distance in the tire axial direction between the shoulder lateral groove and the recess is 2 mm or more, A plurality of the recesses are arranged in the tire axial direction, All of the recesses are located on the axial extension of the shoulder lateral grooves. tire.

Images