Tire

Abstract

To provide a tire which enables improvement of noise performance while maintaining steering stability.SOLUTION: The present invention relates to a tire having a tread part 2. A first land part 7 is provided with a plurality of first lateral grooves 11. A second land part 8 is provided with a plurality of second lateral grooves 12. The plurality of first lateral grooves 11 are arranged in a first arrangement over an entire periphery of the tire. In the first arrangement, the first lateral grooves 11 are arranged so that a first pitch P1 of the first lateral grooves 11 has the number (a) of types, and a first end 11a is provided at the same position as a second end 11b in a tire circumferential direction in the pair of first lateral grooves 11. The plurality of second lateral grooves 12 are arranged in a second arrangement. In the second arrangement, the second lateral grooves 12 are arranged so that a second pitch P2 of the second lateral grooves 12 has the number (b) of types, and the number (b) of types of the second pitch P2 is larger than the number (a) of types of the first pitch P1.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Patent Document 1 listed below proposes a tire in which the pitch number of lateral grooves is specified to improve resistance to uneven wear and noise performance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-122121 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, as vehicles have become quieter, there has been a demand for tires to have even better noise performance. One method known to achieve this is to increase the number of different spacings between lateral grooves in the tread. However, this method reduces the rigidity of the blocks in the tread that are divided by the lateral grooves, which can impair driving stability.

[0005] The present invention has been devised in view of the above circumstances, and has as its main object to provide a tire capable of improving noise performance while maintaining driving stability. [Means for solving the problem]

[0006] The present invention relates to a tire having a tread portion, the tread portion including a plurality of circumferential grooves extending continuously in a tire circumferential direction and a plurality of land portions divided into the plurality of circumferential grooves, the plurality of land portions including a first land portion and a second land portion adjacent to each other, the first land portion being provided with a plurality of first lateral grooves completely crossing a tread surface of the first land portion in the tire axial direction, the second land portion being provided with a plurality of second lateral grooves completely crossing a tread surface of the second land portion in the tire axial direction, the plurality of first lateral grooves each including a first end on one side in the tire axial direction and a second end on the other side in the tire axial direction, the plurality of first lateral grooves being arranged in a first array around one circumference of the tire, and the first array is arranged such that adjacent front and rear land portions in the tire circumferential direction are aligned in a first array. the first lateral grooves are arranged such that a first pitch, which is the distance between the first lateral grooves in the tire circumferential direction, is a number a of types that is 1 or 2 or more around one circumference of the tire, and in a pair of the first lateral grooves that are adjacent in the tire circumferential direction, the first end of one of the first lateral grooves is located at the same position in the tire circumferential direction as the second end of the other first lateral groove, the plurality of second lateral grooves are arranged in a second array around one circumference of the tire, and in the second array, the second lateral grooves are arranged such that a second pitch, which is the distance between the second lateral grooves in the tire circumferential direction, is a number b of types that is 2 or more around one circumference of the tire, and the number b of types of the second pitches is greater than the number a of types of the first pitches. Effect of the Invention

[0007] The tire of the present invention has the above-mentioned configuration, and therefore can improve noise performance while maintaining driving stability. [Brief description of the drawings]

[0008] [Figure 1] 1 is a development view of a tread portion of a tire according to one embodiment of the present invention. [Diagram 2] This is a corner map of the first land portion and the second land portion of Figure 1. [Diagram 3] FIG. 3 is an enlarged view of a first land portion in FIG. 2. [Figure 4]FIG. 4 is a development view of a tread portion of a tire according to another embodiment. [Diagram 5] FIG. 2 is a development view of a tread portion of a tire of a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, some embodiments of the present invention will be described with reference to the drawings. The drawings are described to include the features of the present invention, but may include exaggerated expressions or expressions different from the dimensional ratios of the actual structure in order to facilitate understanding of the present invention. In addition, the same reference numerals are used to refer to the same or common elements throughout the embodiments, and duplicated descriptions will be omitted.

[0010] Fig. 1 is a development view of a tread portion 2 of a tire 1 of this embodiment in a normal state. As shown in Fig. 1, the tire 1 of this embodiment is implemented as, for example, a pneumatic tire for a passenger car. The present invention may also be implemented as a tire for a motorcycle or a tire for heavy loads.

[0011] In the case of a pneumatic tire for which various standards are established, the "normal state" refers to a state in which the tire is mounted on a normal rim, inflated to a 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 state refers to a standard use state 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 state. In addition, in this specification, unless otherwise specified, the method of measuring the dimensions can be appropriately applied to known methods.

[0012] 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."

[0013] "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."

[0014] The tread portion 2 includes two tread ends Te and a ground contact surface between them. The tread ends Te are the axially outermost contact points when the tire 1 in a normal state is loaded with 70% of a normal load and contacts a flat surface with a camber angle of 0°.

[0015] For pneumatic tires with various standards, the "normal load" is the load that each standard specifies for each tire in the standard system that includes 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". For tires without various standards, the "normal load" refers to the maximum load that can be applied when using the tire according to the above standards.

[0016] 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 4 divided by these circumferential grooves. The circumferential grooves 3 in this embodiment include two crown circumferential grooves 5 and two shoulder circumferential grooves 6. The two crown circumferential grooves 5 are provided so as to sandwich the tire equator C. The shoulder circumferential groove 6 is provided between the crown circumferential groove 5 and the tread end Te. As a result, the two shoulder circumferential grooves 6 are provided so as to sandwich the tire equator C and the two crown circumferential grooves 5.

[0017] The groove width W1 of the circumferential groove 3 is 3.0 mm or more, for example, 3.0% to 6.0% of the tread width TW. The tread width TW corresponds to the axial distance from one tread end Te to the other tread end Te in the normal state. The depth of the circumferential groove 3 is preferably, for example, 5 to 10 mm.

[0018] The multiple land portions 4 include a first land portion 7 and a second land portion 8 adjacent to each other. The first land portion 7 in this embodiment is partitioned between the crown circumferential groove 5 and the shoulder circumferential groove 6. The second land portion 8 is partitioned on the axially outer side of the shoulder circumferential groove 6 and includes the tread edge Te. Thus, in this embodiment, a pair of the first land portion 7 and the second land portion 8 is provided on both sides in the axial direction of the tire. In addition to these land portions, in this embodiment, a third land portion 9 is provided on the tire equator C. The third land portion 9 has substantially the same configuration as the first land portion 7 described below.

[0019] Fig. 2 shows an enlarged view of the first land portion 7 and the second land portion 8. As shown in Fig. 2, the first land portion 7 is provided with a plurality of first lateral grooves 11. The first lateral grooves 11 completely cross the tread surface 7s of the first land portion 7 in the tire axial direction. In addition, the second land portion 8 is provided with a plurality of second lateral grooves 12. The second lateral grooves 12 completely cross the tread surface 8s of the second land portion 8 in the tire axial direction.

[0020] Fig. 3 shows an enlarged view of the first land portion 7. As shown in Fig. 3, each of the first lateral grooves 11 includes a first end 11a on one side in the tire axial direction and a second end 11b on the other side in the tire axial direction.

[0021] The first lateral grooves 11 are arranged around the circumference of the tire in a first arrangement, which will be described below. In the first arrangement, the first lateral grooves 11 are arranged so that a first pitch P1, which is the distance in the tire circumferential direction between adjacent first lateral grooves 11 in the tire circumferential direction, is one or two or more kinds a around the circumference of the tire.

[0022] Here, the pitch means the distance in the tire circumferential direction between the groove centerlines of two circumferentially adjacent lateral grooves. If the two adjacent lateral grooves are non-parallel, the distance means the average distance in the tire circumferential direction weighted by the length of the lateral groove. In other words, when two lateral grooves are observed, one pitch value is determined depending on their arrangement.

[0023] In the present invention, the first lateral grooves 11 are arranged so that the first pitch P1 is a number a of one or more types around one circumference of the tire. In the present embodiment, the number a of types is preferably 1. That is, the first lateral grooves 11 are arranged at equal intervals in the tire circumferential direction. However, the present invention is not limited to this embodiment.

[0024] In the first arrangement, in a pair of first lateral grooves 11 adjacent in the tire circumferential direction, the first end 11a of one first lateral groove 11 is provided at the same position in the tire circumferential direction as the second end 11b of the other first lateral groove 11. This configuration means that the first ends 11a and second ends 11b are provided at the same position in the tire circumferential direction in 80% or more of the multiple first lateral grooves 11 provided in the first land portion 7. In a desirable embodiment, the first ends 11a and second ends 11b are arranged as described above in 90% or more of the first lateral grooves 11, and more desirable embodiment, in all of the first lateral grooves 11.

[0025] In addition, "the first end 11a and the second end 11b are located at the same position in the tire circumferential direction" includes at least an aspect in which, in a plan view of the tread, a region 14 (dotted in FIG. 3 for ease of understanding) obtained by extending an opening 13 between the circumferential groove 3 (the shoulder circumferential groove 6 in FIG. 3) at the first end 11a of one of the first lateral grooves 11 in parallel to the tire axial direction overlaps with an opening 15 between the circumferential groove 3 (the crown circumferential groove 5 in FIG. 3) at the second end 11b of the other first lateral groove 11. In addition, from the viewpoint of allowing for errors contained in rubber products such as tires, even if the region 14 and the opening 15 do not overlap, the tire circumferential distance between them is 5% or less of the first pitch P1 of the two corresponding first lateral grooves 11, this also falls under the feature "the first end 11a and the second end 11b are located at the same position in the tire circumferential direction."

[0026] As shown in Fig. 2, the second lateral grooves 12 of the present invention are arranged around one circumference of the tire in a second arrangement described below. In the second arrangement, the second lateral grooves 12 are arranged so that the second pitch P2, which is the distance in the tire circumferential direction between adjacent second lateral grooves 12 in the tire circumferential direction, is a number b of types that is 2 or more around one circumference of the tire. The number b of types of the second pitches P2 is greater than the number a of types of the first pitches P1.

[0027] The tire 1 of the present invention, having the above-mentioned configuration, can improve noise performance while maintaining driving stability for the following reasons.

[0028] Conventionally, pitch noise has been known as a noise generated during tire running. One of the causes of pitch noise is the impact force generated when the lateral grooves contact the road surface. This impact force periodically vibrates the tread portion and sidewall portion of the tire, which may generate pitch noise. In contrast, in the present invention, in a pair of first lateral grooves 11, the first end 11a of one first lateral groove 11 is provided at the same position in the tire circumferential direction as the second end 11b of the other first lateral groove 11. This allows the first lateral grooves 11 to be in continuous contact with the ground during tire running, thereby reducing the fluctuation of the impact force of the first lateral grooves 11. Therefore, the pitch noise of the first lateral grooves 11 can be reduced, and noise performance is improved.

[0029] In the second arrangement of the present invention, the number b of types of the second pitches P2 of the second lateral grooves 12 is relatively large, so that the pitch noise of the second lateral grooves 12 can be made into white noise, and further improvement in noise performance can be expected. Furthermore, in the first arrangement, the number a of types of the first pitches P1 is relatively small, so that excessive deterioration in the pattern rigidity of the first land portion 7 can be suppressed compared to the case where the number of types of pitches (hereinafter sometimes referred to as pitch variation) in each land portion is increased. Therefore, the steering stability can be maintained.

[0030] 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 disclosure can achieve the above-mentioned effects even if it does not have the configuration described below. Furthermore, even if any one of the configurations described below is applied alone to the tire 1 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.

[0031] 1, the first land portion 7 is not disposed on the tire equator C, and does not include the tread end Te. The pattern rigidity of the first land portion 7 is maintained by the above-mentioned configuration, so that the steering stability can be reliably maintained.

[0032] 3, the first lateral groove 11 of this embodiment extends linearly in the tire axial direction with a constant width. The maximum angle θ1 of the first lateral groove 11 with respect to the tire axial direction is, for example, 30 to 50°. However, the first lateral groove 11 is not limited to this form.

[0033] The number a of types of the first pitches P1 is, for example, 1 to 3. In this embodiment, the number a of types of the first pitches P1 is 1, and the first lateral grooves 11 of the same shape are arranged at equal intervals in the tire circumferential direction. In another embodiment, when the number a of types of the first pitches P1 is 2 or more, groups of the first lateral grooves 11 of different angles or shapes may be arranged periodically in the tire circumferential direction. This can be expected to further improve the noise performance as well as the wet performance.

[0034] The first pitch P1 is, for example, 80% to 120% of the tire axial direction W2 of the tread surface 7s of the first land portion 7. When the number a of types of the first pitches P1 is 2 or more, the maximum value of the first pitch P1 is preferably 80% to 95% of the width W2 of the first land portion 7. In addition, the maximum value of the first pitch P1 is preferably 105% to 120% of the width W2 of the first land portion 7.

[0035] As shown in Fig. 1, the second land portion 8 includes the tread end Te. Such a second land portion 8 easily transmits pitch noise to the outside, which has a large impact on noise performance. In this embodiment, it is expected that the noise performance will be further improved by relatively increasing the pitch variation of the land portion including the tread end Te.

[0036] 2, the second lateral groove 12 of this embodiment extends linearly in the tire axial direction with a constant width. The maximum angle θ2 of the second lateral groove 12 with respect to the tire axial direction is smaller than the maximum angle θ1 of the first lateral groove 11 with respect to the tire axial direction. Specifically, the angle θ2 of the second lateral groove 12 is 10° or less, and is set to 0° in this embodiment.

[0037] By setting the angle of the second lateral grooves 12 in the above-mentioned manner, in the second arrangement of this embodiment, two second lateral grooves 12 adjacent in the tire circumferential direction do not overlap in the tire circumferential direction. In other words, a virtual area obtained by extending one of the two second lateral grooves 12 in parallel to the tire axial direction does not overlap with the other second lateral groove 12. This is expected to improve the wear resistance of the second land portion 8 in addition to improving the driving stability.

[0038] In this embodiment, the second lateral grooves 12 having the same shape are arranged in the tire circumferential direction at different intervals in the tire circumferential direction. However, the present invention is not limited to this embodiment, and groups of the second lateral grooves 12 having different angles or shapes may be arranged periodically in the tire circumferential direction.

[0039] The number b of types of the second pitches P2 is, for example, 3 to 5, and is 5 in this embodiment. In Fig. 2, the second pitches P2 are labeled P2a, P2b, P2c, P2d, and P2e in order of increasing circumferential length. The second pitches P2 in this embodiment include pitches that are the same as the first pitch P1 (shown in Fig. 3) (corresponding to P2c), pitches that are smaller than the first pitch P1 (corresponding to P2a and P2b), and pitches that are larger than the first pitch P1 (corresponding to P2d and P2e).

[0040] The minimum value of the second pitch P2 is preferably smaller than the minimum value of the first pitch P1. Specifically, the minimum value of the second pitch P2 is 70% to 90% of the minimum value of the first pitch P1. This allows the frequency band of the pitch noise generated by the second lateral grooves 12 to be expanded while maintaining the steering stability, and the noise performance can be further improved.

[0041] The maximum value of the second pitch P2 is desirably greater than the maximum value of the first pitch P1. Specifically, the maximum value of the second pitch P2 is 105% to 120% of the maximum value of the first pitch P1. This improves the driving stability and noise performance in a well-balanced manner.

[0042] From the same viewpoint, it is preferable that the total number N2 of the second transverse grooves 12 provided in the second land portion 8 is greater than the total number N1 of the first transverse grooves 11 provided in the first land portion 7. Specifically, it is preferable that the total number N2 is 105% to 120% of the total number N1.

[0043] 4 shows a development view of the tread portion 2 of a tire 1 according to another embodiment of the present invention. In this embodiment, one first land portion 7 is formed between two shoulder circumferential grooves 6. This first land portion 7 is provided with a plurality of first lateral grooves 11 extending from one shoulder circumferential groove 6 to the other shoulder circumferential groove 6, and these first lateral grooves 11 are arranged in the above-mentioned first arrangement around one circumference of the tire. Even in this embodiment, the above-mentioned mechanism makes it possible to improve noise performance while maintaining steering stability.

[0044] In this embodiment, the first land portion 7 is provided with one or more longitudinal grooves 20 that cross the multiple first lateral grooves 11 in the tire circumferential direction. The longitudinal grooves 20 may extend continuously in the tire circumferential direction, and may have substantially the same configuration as the crown circumferential groove 5 shown in FIG. 1. In this embodiment, the longitudinal grooves 20 extend continuously in the tire circumferential direction, thereby dividing the first land portion 7 into three block rows 25. In this embodiment, the above-mentioned first lateral grooves 11 and longitudinal grooves 20 improve noise performance while ensuring wet performance.

[0045] Although several embodiments of the tire of the present invention have been described in detail above, the present invention is not limited to the above specific embodiments and can be modified in various aspects. EXAMPLES

[0046] As Examples 1 and 2, pneumatic tires having a size of 195 / 65R15 (mounted rim is 15×6.0, internal pressure 250 kPa) and a tread portion as shown in FIG. 1 or FIG. 4 were prototyped. As a comparative example, a tire having a tread portion as shown in FIG. 5 was prototyped. As shown in FIG. 5, the first land portion a and the second land portion b of the comparative example tire have lateral grooves c extending parallel to the tire axial direction arranged so as to have the same pitch variation. The comparative example tire is substantially the same as the example tire except for the above points. The steering stability and noise performance of these test tires were tested. The test method is as follows.

[0047] <Noise performance> The noise was measured when each test tire was run on a drum testing machine under a vertical load of 4.51 kN and at a speed of 40 to 100 km / h. The results are expressed as an index with the reciprocal of the sound pressure of the noise of the comparative example being set to 100, and the larger the value, the smaller the noise and the more excellent the noise performance.

[0048] <Handling stability> The test tires were fitted to a test vehicle (2000cc, front-wheel drive) and the vehicle was driven on a dry road surface, and the driving stability was evaluated by the driver. The results were scored based on the comparative example being 100, with a higher score indicating better driving stability. The test results are shown in Table 1.

[0049] [Table 1]

[0050] As shown in Table 1, it was confirmed that noise performance was improved while maintaining driving stability.

[0051] [Note] The present invention includes the following aspects.

[0052] [Invention 1] A tire having a tread portion, The tread portion includes a plurality of circumferential grooves extending continuously in a tire circumferential direction and a plurality of land portions divided by the plurality of circumferential grooves, The plurality of land portions include a first land portion and a second land portion adjacent to each other, The first land portion is provided with a plurality of first lateral grooves that completely cross the tread surface of the first land portion in the tire axial direction, The second land portion is provided with a plurality of second lateral grooves that completely cross the tread surface of the second land portion in the tire axial direction, Each of the first lateral grooves includes a first end on one side in the tire axial direction and a second end on the other side in the tire axial direction, The first lateral grooves are arranged in a first arrangement around one circumference of the tire, In the first sequence, The first lateral grooves are arranged such that a first pitch, which is a distance in the tire circumferential direction between adjacent first lateral grooves in the tire circumferential direction, is one or more types a around one circumference of the tire; and In a pair of the first lateral grooves adjacent to each other in the tire circumferential direction, the first end of one of the first lateral grooves is provided at the same position in the tire circumferential direction as the second end of the other of the first lateral grooves, The second lateral grooves are arranged in a second sequence around one circumference of the tire, In the second sequence, The second lateral grooves are arranged such that a second pitch, which is a circumferential interval between adjacent second lateral grooves in the tire circumferential direction, is a number b of types that is 2 or more around one circumference of the tire, and the number b of types of the second pitches is greater than the number a of types of the first pitches. tire. [Invention 2] The tire according to invention 1, wherein the minimum value of the second pitch is smaller than the minimum value of the first pitch. [Invention 3] The tire according to the first or second aspect of the present invention, wherein the maximum value of the second pitch is greater than the maximum value of the first pitch. [Invention 4] The tire according to any one of claims 1 to 3, wherein the number a of types of the first pitch is 1 to 3. [Invention 5] The tire according to any one of claims 1 to 4, wherein the number b of types of the second pitches is 3 to 5. [Invention 6] The tire according to any one of claims 1 to 5, wherein a total number of the second lateral grooves provided in the second land portion is greater than a total number of the first lateral grooves provided in the first land portion. [Invention 7] The tire according to any one of claims 1 to 6, wherein the second arrangement is such that two of the second lateral grooves adjacent to each other in the tire circumferential direction do not overlap each other in the tire circumferential direction. [Invention 8] The tire according to any one of claims 1 to 7, wherein a maximum angle of the second lateral groove with respect to the tire axial direction is smaller than a maximum angle of the first lateral groove with respect to the tire axial direction. [The present invention 9] The tire according to any one of claims 1 to 8, wherein the first land portion is provided with one or a plurality of longitudinal grooves that cross the plurality of first lateral grooves in the tire circumferential direction. [Explanation of symbols]

[0053] 2 Tread section 3 Circumferential groove 4 Land 7 1st Land Department 8 2nd Land Department 11 First Yokomizo 12 The Second Yokomizo 11a 1st end 11b 2nd end P1 First pitch P2 2nd pitch a Number of types of first pitch b Number of types of second pitch

Claims

1. A tire having a tread portion, The tread portion includes a plurality of circumferential grooves extending continuously in a tire circumferential direction and a plurality of land portions divided by the plurality of circumferential grooves, The plurality of land portions include a first land portion and a second land portion adjacent to each other, The first land portion is provided with a plurality of first lateral grooves that completely cross the tread surface of the first land portion in the tire axial direction, The second land portion is provided with a plurality of second lateral grooves that completely cross the tread surface of the second land portion in the tire axial direction, Each of the first lateral grooves includes a first end on one side in the tire axial direction and a second end on the other side in the tire axial direction, The first lateral grooves are arranged in a first arrangement around one circumference of the tire, In the first array, The first lateral grooves are arranged such that a first pitch, which is a distance in the tire circumferential direction between adjacent first lateral grooves in the tire circumferential direction, is one or more types a around one circumference of the tire; and In a pair of the first lateral grooves adjacent to each other in the tire circumferential direction, the first end of one of the first lateral grooves is provided at the same position in the tire circumferential direction as the second end of the other of the first lateral grooves, The second lateral grooves are arranged in a second sequence around one circumference of the tire, In the second array, the second lateral grooves are arranged such that a second pitch, which is a distance in the tire circumferential direction between adjacent second lateral grooves in the tire circumferential direction, is a number b of types that is 2 or more around one circumference of the tire, and the number b of types of the second pitches is greater than the number a of types of the first pitches; tire.

2. The tire of claim 1 , wherein the second pitch minimum is less than the first pitch minimum.

3. The tire according to claim 1 or 2, wherein a maximum value of the second pitch is greater than a maximum value of the first pitch.

4. The tire according to claim 1 or 2, wherein the number a of types of the first pitches is 1 to 3.

5. The tire according to claim 1 or 2, wherein the number b of types of the second pitches is 3 to 5.

6. The tire according to claim 1 , wherein a total number of the second lateral grooves provided in the second land portion is greater than a total number of the first lateral grooves provided in the first land portion.

7. The tire according to claim 1 or 2, wherein the second arrangement is such that two of the second lateral grooves adjacent to each other in the tire circumferential direction do not overlap each other in the tire circumferential direction.

8. The tire according to claim 1 or 2, wherein a maximum angle of the second lateral groove with respect to the tire axial direction is smaller than a maximum angle of the first lateral groove with respect to the tire axial direction.

9. The tire according to claim 1 or 2, wherein the first land portion is provided with one or a plurality of longitudinal grooves that cross the plurality of first lateral grooves in the tire circumferential direction.

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