Abstract:
First inclined grooves ( 110 ) and second inclined grooves ( 160 ) are formed on a land portion ( 40 ) of a tire. The first inclined grooves ( 110 ) and second inclined grooves ( 160 ) are alternately formed in the circumferential direction of the tire. Circumferential direction sipes ( 200 ) comprise: first circumferential direction sipes ( 210 ) that are formed extending from the end at the land portion ( 40 ) side of the first inclined grooves ( 110 ) to the central portion, in the tread width direction, of the second inclined grooves ( 160 ); and second circumferential direction sipes ( 220 ) that extend from the central portion, in the tread width direction, of the second inclined grooves ( 160 ) along the extension line from the first circumferential sipes ( 210 ). The second circumferential sipes ( 220 ) terminate in the land portion ( 40 ).

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a National Stage of International Application No. PCT/JP2012/068928 filed Jul. 26, 2012, claiming priority based on Japanese Patent Application Nos. 2011-163363 filed Jul. 26, 2011 and 2011-253833 filed Nov. 21, 2011, the contents of all of which are incorporated herein by reference in their entirety. 
     TECHNICAL FIELD 
     The present invention relates to a tire provided with a rib-like land portion that extends in a tire circumferential direction, and provided, on the rib-like land portion, with a circumferential siping extending in the tire circumferential direction. 
     BACKGROUND ART 
     Conventionally, a pneumatic tire (hereinafter, referred to as tire) mounted to a passenger vehicle, etc., uses a tread pattern in which a circumferential siping extending in the tire circumferential direction is formed on a rib-like land portion extending, similarly, in the tire circumferential direction. 
     For example, it is known a tire in which a circumferential siping extending in a tire circumferential direction is formed in the circumferential siping provided in a center portion in a tread widthwise direction in order that a braking performance on a wet road surface coexists with a wear resistance (for example, Patent Literature 1). One end of the circumferential siping is terminated within the rib-like land portion, and the other end of the circumferential siping is communicated to an inclined groove inclined relative to the tire circumferential direction. Further, one end of the inclined groove is terminated within the rib-like land portion, and the other end of the inclined groove is communicated to a circumferential groove adjacent to the rib-like land portion. 
     However, along with an improvement in performance of a recent general passenger vehicle, there is an increased demand to further improve various performances on a wet road surface. In particular, it is demanded that a water drainage performance and a steering stability, which is normally in a trade-off relationship, coexist at a higher level. 
     CITATION LIST 
     Patent Literature 
     [Patent Literature 1] Japanese Patent Publication No. 2009-202772 
     SUMMARY OF INVENTION 
     A tire according to a first feature comprises a land portion divided by a circumferential groove extending in a tire circumferential direction and extending in the tire circumferential direction, and a circumferential siping, which is formed in the land portion, extending in the tire circumferential direction. The land portion is formed with: a first inclined groove that extends from one lateral portion in a tread widthwise direction of the land portion and that is inclined relative to the tire circumferential direction; and a second inclined groove that extends from the other lateral portion in the tread widthwise direction of the land portion and that is inclined relative to the tire circumferential direction. The first inclined groove and the second inclined groove are alternately formed in the tire circumferential direction. The circumferential siping includes: a first circumferential siping that is formed from an end at a land portion side of the first inclined groove to an intermediate portion in the tread widthwise direction of the second inclined groove; and a second circumferential siping that extends from an intermediate portion in the tread widthwise direction of the second inclined groove along on an extended line of the first circumferential siping. The second circumferential siping is terminated within the land portion. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a developed plan view illustrating a part of a tread of a pneumatic tire  10  according to a first embodiment. 
         FIG. 2  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  10  according to the first embodiment. 
         FIG. 3  is a developed plan view illustrating a part of a tread of a pneumatic tire  310  according to a second embodiment. 
         FIG. 4  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  310  according to the second embodiment. 
         FIG. 5  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  310  according to the second embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     [First Embodiment] 
     A tire (pneumatic tire) according to a first embodiment will be explained below with reference to drawings. It is noted that, in the following description of the drawings, the same or similar reference numerals are used to designate the same or similar portions. It is appreciated that the drawings are schematically shown and the ratio and the like of each dimension are different from the real ones. 
     Accordingly, specific dimensions and the like should be determined in consideration of the explanation below. Moreover, among the drawings, the respective dimensional relations or ratios may differ. 
     (1-1) Schematic Configuration of Pneumatic Tire 
       FIG. 1  is a developed plan view illustrating a part of a tread of a pneumatic tire  10  according to a first embodiment. As shown in  FIG. 1 , on the pneumatic tire  10 , a circumferential groove  20  and a circumferential groove  30  are formed. It is noted that the pneumatic tire  10  may be filled with, instead of air, an inert gas such as nitrogen gas. Further, in  FIG. 1 , a portion with a thin line indicates a region not contacting a road surface with a normal internal pressure and a normal load. 
     The pneumatic tire  10  is provided with a rib-like land portion  40  extending in a tire circumferential direction D C . In the first embodiment, two rib-like land portions  40  are formed at both sides in a tread widthwise direction D T  with respect to a tire equator line CL. In the rib-like land portion  40 , a plurality of inclined grooves  100  and a plurality of circumferential sipings  200  are formed. 
     The circumferential siping  200  is a straight siping extending in the tire circumferential direction D C . The groove width of the circumferential siping  200  is narrower than the groove width of the inclined groove  100 . 
     (1-2) Shape of Land Portion 
       FIG. 2  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  10 . As shown in  FIG. 2 , in the rib-like land portion  40 , a first inclined groove  110  that extends from one lateral portion in the tread widthwise direction D T  of the rib-like land portion  40  and that is inclined relative to the tire circumferential direction Dc, and a second inclined groove  160  that extends from the other lateral portion in the tread widthwise direction D T  of the rib-like land portion  40  and that is inclined relative to the tire circumferential direction Dc are formed as the inclined groove  100 . The first inclined groove  110  and the second inclined groove  160  are alternately formed in the tire circumferential direction D C . 
     Further, in the rib-like land portion  40 , the circumferential siping  200  is formed by a first circumferential siping  210  formed from the end at the rib-like land portion  40  side of the first inclined groove  110  to an intermediate portion in the tread widthwise direction D T  of the second inclined groove  160 , and a third circumferential siping  260  formed from the end at the rib-like land portion  40  side of the second inclined groove  160  to an intermediate portion in the tread widthwise direction D T  of the first inclined groove  110 . 
     Further, in the first embodiment, in the rib-like land portion  40 , a second circumferential siping  220  is formed which extends from an intermediate portion in the tread widthwise direction D T  of the second inclined groove  160  along an extended line of the first circumferential siping  210 . The second circumferential siping  220  is terminated within the rib-like land portion  40 . Further, in the rib-like land portion  40 , a fourth circumferential siping  270  is formed which extends from an intermediate portion in the tread widthwise direction D T  of the first inclined groove  110  along an extended line of the third circumferential siping  260 . The fourth circumferential siping  270  is terminated within the rib-like land portion  40 . 
     The first circumferential siping  210 , the second circumferential siping  220 , the third circumferential siping  260 , and the fourth circumferential siping  270  extend in approximate parallel with the tire circumferential direction D C ; however, these sipings may be inclined by about 5 to 10 degrees about the tire circumferential direction D C  (tire equator line CL). Further, the rib-like land portion  40  in which the first circumferential siping  210 , the second circumferential siping  220 , the third circumferential siping  260 , and the fourth circumferential siping  270  are formed preferably is arranged within a region 60% the tread width including the tire equator line CL, in a state where a normal load is applied to the pneumatic tire  10  set to have a normal internal pressure regulated by Japan Automobile Tyre Manufacturers Association (JATMA), etc. 
     (1-3) Operation and Effect 
     According to the pneumatic tire  10 , the first inclined groove  110  and the second inclined groove  160  formed alternately in the tire circumferential direction D C  ensure a basic drainage performance of rainwater that has entered the rib-like land portion  40 . Further, the formation of the straight first circumferential siping  210  and the third circumferential siping  260  communicated to these inclined grooves enables an improvement of water removal (water absorption) effect in the rib-like land portion  40 . Moreover, the rib-like land portion  40  is not divided in the tread widthwise direction D T , and thus, it is also possible to ensure the rigidity of the rib-like land portion  40 . 
     That is, it is possible to ensure the basic drainage performance of rainwater that has entered the grounding surface by the first inclined groove  110  and the second inclined groove  160  having a low angle to be formed with the tread widthwise direction D T , and remove rainwater that has entered the rib-like land portion  40  from the grounding surface by the first circumferential siping  210  and the third circumferential siping  260 . 
     Further, the first circumferential siping  210  and the third circumferential siping  260  are formed at the identical location in the tread widthwise direction D T , that is, the first circumferential siping  210  and the third circumferential siping  260  are formed in a straight line manner in the tire circumferential direction D C , and thus, it is possible to further improve the water removal effect. 
     That is, the pneumatic tire  10  enables the water drainage performance and the steering stability to coexist at a high level. 
     In the first embodiment, the second circumferential siping  220  and the fourth circumferential siping  270 , in a straight line manner, terminated within the rib-like land portion are formed. Further, the first circumferential siping  210  and the second circumferential siping  220  are formed on a straight line extending in the tire circumferential direction D C , and the third circumferential siping  260  and the fourth circumferential siping  270  are, similarly, formed on a straight line extending in the tire circumferential direction D C . Thus, it is possible to further improve the water removal (water absorption) effect in the rib-like land portion  40 . 
     (1-4) Other Embodiments 
     So far, the contents of the present invention are disclosed through the embodiment of the present invention. However, it should not be interpreted that the statements and drawings constituting a part of the present disclosure limit the present invention. From this disclosure, a variety of alternate embodiments, examples, and applicable techniques will become apparent to one skilled in the art. 
     For example, the second circumferential siping  220  and the fourth circumferential siping  270  may not be necessarily formed in the rib-like land portion  40 . Further, the circumferential siping  200  may not necessarily be liner; may be of slightly meandering shape, for example. 
     As described above, needless to say, the present invention includes various embodiments and the like not described here. Therefore, the technical range of the present invention is to be defined only by the inventive specific matter according to the adequate claims from the above description. 
     [Second Embodiment] 
     A tire (pneumatic tire) according to a second embodiment will be explained below with reference to drawings. It is noted that, in the following description of the drawings, the same or similar reference numerals are used to designate the same or similar portions. It is appreciated that the drawings are schematically shown and the ratio and the like of each dimension are different from the real ones. 
     Accordingly, specific dimensions and the like should be determined in consideration of the explanation below. Moreover, among the drawings, the respective dimensional relations or ratios may differ. 
     (2-1) Schematic Configuration of Pneumatic Tire 
       FIG. 3  is a developed plan view illustrating a part of a tread of a pneumatic tire  310  according to the second embodiment. As shown in  FIG. 3 , on the pneumatic tire  310 , a circumferential groove  320  and a circumferential groove  330  are formed. The circumferential groove  320  and the circumferential groove  330  extend along the tire circumferential direction Tc It is noted that the pneumatic tire  310  may be filled with, instead of air, an inert gas such as nitrogen gas. Further, in  FIG. 3 , a portion with a thin line indicates a region not contacting a road surface with a normal internal pressure and a normal load. In other words, a portion inside, in a tread widthwise direction Tw, from the portion with a thin line, is the tread grounding surface. 
     Herein, in the second embodiment, the both ends in the tread widthwise direction Tw of the tread grounding surface indicate the both ends in the tread widthwise direction Tw within a grounding range in a state where the tire contacts the road surface. The state where the tire contacts the road surface indicates a state where the tire is mounted to a normal rim and is applied a normal internal pressure and a normal load, for example. It is noted that the “normal rim” indicates the standard rim in the applicable size defined in the 2008 edition of the Year Book of the JATMA (Japan Automobile Tyre Manufactures Association). The normal internal pressure is the air pressure corresponding to the maximum loading capability set forth in the 2008 edition of the Year Book of the JATMA. The normal load is a load that corresponds to the maximum loading capability when a single wheel is applied, set forth in the 2008 edition of the Year Book of the JATMA. Outside Japan, the specification that defines these is determined on the basis of industrial standards effective in regions where the tire is manufactured or used. For example, this would be the “Year Book of The Tire and Rim Association Inc.” in the United States of America, and the “Standards Manual of The European Tire and Rim Technical Organization” in Europe. 
     Further, when the pneumatic tire  310  is divided by the circumferential groove  320  and the circumferential groove  330 , an outer land portion  340  extending in the tire circumferential direction Tc and a center land portion  350  extending in the tire circumferential direction Tc are provided. In the second embodiment, two outer land portions  340  are formed at both sides in the tread widthwise direction Tw with respect to the tire equator line CL. Further, the center land portion  350  is formed inside, in the tread widthwise direction Tw, from the outer land portion  340 . The center land portion  350  is arranged at a location including the tire equator line CL. That is, the center land portion  350  is arranged on the tire equator line CL. 
     In the second embodiment, the outer land portion  340  configures a “land portion” defined in the scope of the claims, and the center land portion  350  configures a “center land portion” defined in the scope of the claims. 
     In the outer land portion  340 , a plurality of inclined grooves  400  and a plurality of circumferential sipings  500  are formed. The circumferential siping  500  is a straight siping extending in the tire circumferential direction Tc. It is noted that in the second embodiment, the siping has a groove width capable of closing when the land portion comes in contact with the ground. Specifically, the siping has a groove width of 1.5 mm or less. However, in the tire such as a TBR tire used for a large bus or a truck, a groove width of the siping may be 1.5 mm or more. It is noted that the groove width of the circumferential siping  500  is narrower than the groove width of the inclined groove  400 . 
     In the center land portion  350 , widthwise sipings  600  are cyclically formed with a predetermined interval in the tire circumferential direction. Each widthwise siping  600  extends in the tread widthwise direction Tw. In the second embodiment, the widthwise siping  600  is a straight siping that extends to be inclined relative to the tread widthwise direction Tw. 
     (2-2) Configuration of Outer Land Portion 
       FIG. 4  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  310 . As shown in  FIG. 4 , in the outer land portion  340 , a first inclined groove  410  that extends from one lateral portion in the tread widthwise direction Tw of outer land portion  340  and that is inclined relative to the tire circumferential direction Tc, and a second inclined groove  420  that extends from the other lateral portion in the tread widthwise direction Tw of the outer land portion  340  and that is inclined relative to the tire circumferential direction Tc are formed as the inclined groove  400 . The first inclined groove  410  and the second inclined groove  420  are alternately formed in the tire circumferential direction Tc. 
     Further, at least one of an inclined angle θ 1 , relative to the tire circumferential direction Tc, of the first inclined groove  410  and an inclined angle θ 2  relative to the tire circumferential direction Tc of the second inclined groove  420  preferably is in a range of 20 degrees or more and 60 degrees or less. It is noted that in the second embodiment, an example in which both the inclined angle θ 1  and the inclined angle θ 2  are in a range of 20 degrees or more and 60 degrees or less will be described. 
     Specifically, the inclined angle θ 1  formed between a direction A 1  in which the first inclined groove  410  extends and a straight line parallel to the tire circumferential direction Tc is in a range of 20 degrees or more and 60 degrees or less. Herein, the direction A 1  in which the first inclined groove  410  extends is indicated, in the tread surface view, by a straight line that links a center in the tire circumferential direction Tc, at a lateral portion in the tread widthwise direction Tw of the outer land portion  340 , of the first inclined groove  410  and an end point, located closest to the outer land portion  340  side, of the first inclined groove  410 . It is noted that when the end, located closest to the outer land portion  340  side, of the first inclined groove  410  is a straight line along the tire circumferential direction Tc, the end point is the center in the tire circumferential direction Tc of the end. 
     On the other hand, the inclined angle θ 2  formed between a direction A 2  in which the second inclined groove  420  extends and a straight line parallel to the tire circumferential direction Tc is in a range of 20 degrees or more and 60 degrees or less. Herein, the direction A 2  in which the second inclined groove  420  extends is indicated, in the tread surface view, by a straight line that links a center in the tire circumferential direction Tc, at a lateral portion in the tread widthwise direction Tw of the outer land portion  340 , of the second inclined groove  420  and an end point, located closest to the outer land portion  340  side, of the second inclined groove  420 . It is noted that when the end, located closest to the outer land portion  340  side, of the second inclined groove  420  is a straight line relative to the tire circumferential direction Tc, the end point is the center in the tire circumferential direction Tc of the end. 
     Further, in the outer land portion  340 , a first circumferential siping  510  formed from the end at the outer land portion  340  side of the first inclined groove  410  to an intermediate portion in the tread widthwise direction Tw of the second inclined groove  420 , and a second circumferential siping  520  extending from an intermediate portion in the tread widthwise direction Tw of the second inclined groove  420  along on an extended line of the first circumferential siping  510  are formed as the circumferential siping  500 . Further, the second circumferential siping  520  is terminated within the outer land portion  340 . It is noted that in the pneumatic tire  310 , an acute angle portion, which forms an acute angle in the tread surface view, is formed in the outer land portion  340  by the first inclined groove  410  inclined relative to the tire circumferential direction Tc and the first circumferential siping  510  extending in the tire circumferential direction Tc. 
     Further, the first circumferential siping  510  and the second circumferential siping  520  extend in approximate parallel with the tire circumferential direction Tc; however, these sipings may be inclined by about 5 to 10 degrees about the tire circumferential direction Tc (tire equator line CL). Further, the outer land portion  340  in which the first circumferential siping  510  and the second circumferential siping  520  are formed preferably is arranged within a region 60% the tread width including the tire equator line CL, in a state where a normal load is applied to the pneumatic tire  310  set to have a normal internal pressure regulated by Japan Automobile Tyre Manufacturers Association (JATMA), etc. 
     (2-3) Shape of Center Land Portion 
       FIG. 5  is an enlarged plan view illustrating a part of a tread of the pneumatic tire  310 . As shown in  FIG. 5 , in the center land portion  350 , a first widthwise siping  610  that extends from one lateral portion in the tread widthwise direction Tw of the center land portion  350  and that is terminated within the center land portion  350 , and a second widthwise siping  620  that extends from the other lateral portion in the tread widthwise direction Tw of the center land portion  350  and that is terminated within the center land portion  350  are formed as the widthwise siping  600 . 
     Specifically, in the first widthwise siping  610 , one end  610   a  is opened to the circumferential groove  330  adjacent to one side of the center land portion  350 , and the other end  610   b  is terminated within the center land portion  350 . Further, in the second widthwise siping  620 , one end  620   a  is opened to the circumferential groove  330  adjacent to the other side of the center land portion  350 , and the other end  620   b  is terminated within the center land portion  350 . 
     Further, the second widthwise siping  620  preferably extends along on an extended line of the first widthwise siping  610 . It is noted that in the second embodiment, the first widthwise siping  610  and the second widthwise siping  620  extend in approximate parallel to each other; these may extend in respectively different directions. An angle formed between a straight line along the tread widthwise direction Tw and a direction in which the first widthwise siping  610  extends preferably is 0 degree or more and less than 60 degrees relative to the tread widthwise direction Tw. Similarly, an angle formed between a straight line along the tread widthwise direction Tw and a direction in which the second widthwise siping  620  extends preferably is 0 degree or more and less than 60 degrees relative to the tread widthwise direction Tw. 
     Further, the first widthwise siping  610  and the second widthwise siping  620  are terminated outside, in the tread widthwise direction Tw, from the tire equator line CL, within the center land portion  350 . Specifically, the end  610   b  of the first widthwise siping  610  and the end  620   b  of the second widthwise siping  620  are located outside, in the tread widthwise direction Tw, from the tire equator line CL. That is, an isolation portion in which the first widthwise siping  610  and the second widthwise siping  620  are isolated is formed on the tire equator line CL. 
     (2-4) Operation and Effect 
     According to the pneumatic tire  310  according to the second embodiment, the first inclined groove  410  and the second inclined groove  420  formed alternately in the tire circumferential direction Tc ensure a basic drainage performance of rainwater that has entered the outer land portion  340 . Further, the formation of the straight first circumferential siping  510  and the second circumferential siping  520  communicated to these inclined grooves  400  (the first inclined groove  410  and the second inclined groove  420 ) enables an improvement of water removal (water absorption) effect in the outer land portion  340 . Moreover, the outer land portion  340  is not divided in the tread widthwise direction Tw, and thus, it is possible also to ensure the rigidity of the outer land portion  340 . 
     Further, in the second embodiment, the inclined angle θ 1 , relative to the tire circumferential direction Tc, of the first inclined groove  410  and the inclined angle θ 2 , relative to the tire circumferential direction Tc, of the second inclined groove  420  are in a range of 20 degrees or more and 60 degrees or less. According to such a pneumatic tire  310 , a corner portion formed, by the first inclined groove  410  and the second inclined groove  420 , in the outer land portion  340  is less likely to be peeled off during tire rolling, and thus, it is possible to improve a grounding property. 
     In particular, in the outer land portion  340 , the first inclined groove  410  and the second inclined groove  420  are alternately formed in the tire circumferential direction Tc, and thus, it is possible to ensure the rigidity of the outer land portion  340  not only in a case where the inclined angles θ 1  and θ 2  are a low angle (for example, in a range of 45 to 60 degrees) but also in a case where the inclined angles θ 1  and θ 2  are a slightly high angle (for example, 30 to 45 degrees). Further, in the outer land portion  340 , the first circumferential siping  510  communicating to the first inclined groove  410  and the second circumferential siping  520  communicating to the second inclined groove are formed, and thus, it is possible to ensure a water removal (water absorption) effect on the surface of the outer land portion  340  even in a case where the inclined angles θ 1  and θ 2  are a slightly high angle (for example, in a range of equal to or more than 30 degrees and equal to or less than 45 degrees). That is, it is possible to ensure the rigidity of the outer land portion  340  while ensuring the water removal effect. 
     Thus, the pneumatic tire  310  according to the second embodiment enables the water drainage performance and the steering stability to coexist at a high level. 
     In the second embodiment, the second circumferential siping  520 , in a straight line manner, terminated within the outer land portion  340  is formed. Further, the first circumferential siping  510  and the second circumferential siping  520  are formed at the identical location in the tread widthwise direction Tw. That is, the first circumferential siping  510  and the second circumferential siping  520  are formed to be liner in the tire circumferential direction Tc. Thus, it is possible to further improve the water removal (water absorption) effect in the outer land portion  340 . 
     Further, in the center land portion  350 , by the first widthwise siping  610  and the second widthwise siping  620 , the widthwise sipings  600  are cyclically formed in the tire circumferential direction  600 . 
     Further, the second widthwise siping  620  extends along on an extended line of the first widthwise siping  610 . Such a pneumatic tire  310  enables removing of water that has entered the center land portion  350  from the grounding surface so as to improve a water drainage performance. Further the pneumatic tire  310  enables appropriately restraining of the rigidity of the center land portion  350  so as to restrain a center wear. 
     Further, the first widthwise siping  610  and the second widthwise siping  620  are terminated outside, in the tread widthwise direction Tw, from the tire equator line CL, within the center land portion  350 . That is, in the center land portion  350 , an isolation portion in which the first widthwise siping  610  and the second widthwise siping  620  are isolated is formed on the tire equator line CL. Such a pneumatic tire  310  enables prevention of the rigidity of the center land portion  350  from drastically decreasing, and thus, to ensure the steering stability. 
     (2-5) Other Embodiments 
     So far, the contents of the present invention are disclosed through the embodiment of the present invention. However, it should not be interpreted that the statements and drawings constituting a part of the present disclosure limit the present invention. From this disclosure, a variety of alternate embodiments, examples, and applicable techniques will become apparent to one skilled in the art. 
     For example, the circumferential siping  500  may not necessarily be liner; may be of slightly meandering shape. The widthwise siping  600  may not necessarily be liner; may be of slightly meandering shape, for example. 
     Further, in the above-described embodiments, the second widthwise siping  620  is formed so as to extend on an extended line of the first widthwise siping  610 ; however, the second widthwise siping  620  may be formed at a location shifted, by a predetermined interval in the tire circumferential direction Tc, from the extended line of the first widthwise siping  610 . 
     As described above, needless to say, the present invention includes various embodiments and the like not described here. Therefore, the technical range of the present invention is to be defined only by the inventive specific matter according to the adequate claims from the above description. 
     INDUSTRIAL APPLICABILITY 
     According to a characteristic of the present invention, it is possible to provide a tire that enables the water drainage performance and the steering stability to coexist at a high level.