JP7554586B2 - Pneumatic tires - Google Patents

Description

The present invention relates to a pneumatic tire.

Patent Document 1 discloses a pneumatic tire with a protrusion on the tire side that protrudes outward in the tire width direction from the basic profile surface. With this pneumatic tire, it is intended that when traveling on a road surface such as a rocky area, the protrusion on the tire side will come into contact with rocks on the road surface, thereby increasing traction performance.

JP 2016-055820 A

When protrusions are provided as traction elements, it is necessary to improve the rigidity of the protrusions in order to suppress damage to the protrusions due to the load acting on the protrusions. Furthermore, when protrusions are formed on the tire side, a tire mold for molding the pneumatic tire is provided with recesses for forming the protrusions, but this tends to cause poor rubber flow into the recesses during vulcanization molding, resulting in bear-in defects. In particular, the higher the protrusions are increased in an attempt to increase traction performance, the more likely it is that poor rubber flow into the recesses in the tire mold will occur.

The present invention aims to provide a pneumatic tire that can improve the rigidity of the protrusions formed on the tire side while suppressing the occurrence of bare defects in the protrusions.

The present invention relates to
A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
and a protrusion connecting a side surface of the protrusion and the basic profile surface ,
The present invention provides a pneumatic tire, wherein the protrusions have a height from the basic profile surface to the outside in the tire width direction, the height increasing toward the side surface, and extend in the tire circumferential direction .

According to the present invention, the ridges connect the sides of the convex portion to the base profile surface, improving the rigidity of the convex portion.

In addition, in the tire mold for molding this pneumatic tire, the groove for forming the protrusion is formed so as to communicate between the basic molding surface for molding the basic profile surface and the recess for molding the protrusion. As a result, when vulcanizing a green tire with this tire mold, the flowing rubber is easily allowed to flow into the recess through the groove. Furthermore, by configuring the portion connecting the protrusion and the basic profile surface as a protrusion, the volume of the groove is not excessive compared to when the entire side surface of the protrusion is connected to the basic profile surface, and therefore the amount of rubber to fill the groove is not excessive. This suppresses poor rubber flow into the recess, thereby suppressing bear-ins in the vulcanized pneumatic tire. Therefore, it is possible to increase the rigidity of the protrusion while suppressing bear-ins.

The height of the ridges from the basic profile surface toward the side surface in the tire width direction increases, so that the ridges are arranged between the basic profile surface and the convex portions in a diagonal brace shape, and the ridges can effectively support the convex portions. Also, in the tire mold, the grooves for forming the ridges increase in depth toward the concave portions, so that when a green tire is vulcanized using this tire mold, the rubber that flows along the basic molding surface can be made to gradually flow into the grooves and smoothly flow into the concave portions via the grooves.

The ridges may be curved so that their cross-sectional shape along the extension direction is concave toward the inside in the tire width direction.

This configuration prevents the volume of the protrusions from increasing. This prevents the volume of the grooves in the tire mold from becoming excessively large, so the rubber filling the grooves is not excessive, and poor filling of the rubber into the recesses is prevented.

The ridges may be curved such that in a cross-sectional shape along the extension direction, the joints with the base profile surface and/or the joints with the side surfaces are recessed inward in the tire width direction.

With this configuration, when a load is applied to the convex portion, stress concentration at the joints between the ridges and the base profile surface and side surface is alleviated. This reduces cracks at the joints.

Another aspect of the present invention is
A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
a protrusion connecting a side surface of the protrusion and the basic profile surface;
It has
The protrusion has a height from the basic profile surface to an outer side in the tire width direction, the height increasing toward the side surface,
The present invention provides a pneumatic tire, in which the protrusions have a width, in a side view of the pneumatic tire, that increases with increasing distance from the side surface in the extension direction.

The width of the protrusions increases in a side view of the pneumatic tire as they move away from the side surface in the extension direction, so that in the tire mold, rubber flowing along the basic molding surface can be easily introduced efficiently into the grooves. Meanwhile, the connection portions to the recesses increase in height from the basic profile surface but are configured to be relatively narrow, so that the volume of the grooves is prevented from becoming excessive. Thus, the shallow portions of the grooves are formed wide, while the deep portions are formed narrow. Thus, the grooves are prevented from becoming excessively large, and insufficient filling of the rubber into the recesses is prevented.

Yet another aspect of the present invention is
A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
a protrusion connecting a side surface of the protrusion and the basic profile surface;
It has
The protrusions are provided in a plurality of directions perpendicular to the direction of extension toward the side surface,
The plurality of protrusions include at least two types of protrusions having different heights from the basic profile surface toward an outer side in the tire width direction and different lengths in the extension direction,
the at least two types of ridges include first ridges and second ridges,
The height of the first protrusion is greater than the height of the second protrusion,
The second ridge has a length longer than that of the first ridge .

Since the ridges are provided in a direction perpendicular to the direction of extension toward the side surface , the rigidity of the protrusions can be improved more effectively by the ridges. Furthermore, in the tire mold, the rubber that flows along the basic molding surface can be easily introduced into the recesses through the grooves. This prevents the recesses from being filled with rubber insufficiently.

The multiple ridges have at least two types of ridges that differ in height from the basic profile surface outward in the tire width direction and in length in the extension direction, and therefore the positions of the ends of the multiple ridges differ in the tire circumferential direction and in the height direction of the side surface, so that when a load is applied to the convex portions, the ends of the ridges, where stress is likely to concentrate, can be dispersed in the tire circumferential direction and in the height direction of the convex portions, thereby suppressing cracks at the ends.

the at least two types of ridges include first ridges and second ridges,
The height of the first protrusion is greater than the height of the second protrusion,
Since the second ridges are longer than the first ridges , the first ridges are taller from the basic profile surface, which makes it easier to improve the rigidity of the protrusions. Meanwhile, the second ridges are long along the basic profile surface, which makes it easier for the rubber flowing along the basic molding surface in the tire mold to flow quickly into the grooves for forming the second ridges, which makes it easier to speed up the flow of rubber into the recesses. Furthermore, the first ridges are tall but short in the tire circumferential direction, while the second ridges are long in the tire circumferential direction but short, which makes it easier to prevent the volume of the ridges from becoming excessively large. Thus, it is easy to achieve both improved rigidity of the protrusions and reduced insufficient filling of the recesses with rubber at a high level.

Yet another aspect of the present invention is
A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
a protrusion connecting a side surface of the protrusion and the basic profile surface;
It has
The protrusions are provided in a plurality of directions perpendicular to the direction of extension toward the side surface,
The present invention provides a pneumatic tire , wherein the plurality of ridges include first ridges and second ridges that have different widths in a side view of the pneumatic tire.

Since the multiple ridges have first and second ridges with different widths in a side view of the pneumatic tire, stress concentrated at the ends when a load is applied to the convex portion is easily dispersed among the first and second ridges with different widths, thereby suppressing cracks at the ends.

The plurality of ridges may alternate between the first ridges and the second ridges in the arrangement direction.

With this configuration, the first and second ridges are provided in a well-balanced manner, which makes it easier to uniformly improve the rigidity of the protruding parts in the tire radial direction while uniformly suppressing poor filling of the rubber into the recessed parts in the tire mold in the tire radial direction.

The pneumatic tire according to the present invention can improve the rigidity of the protrusions formed on the tire side while suppressing the occurrence of bare defects in the protrusions.

1 is a meridian cross-sectional view of a pneumatic tire according to one embodiment of the present invention. 2 is an enlarged perspective view of a main part of a tire side portion as viewed from an arrow A in FIG. 1 . FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 . FIG. 4 is a diagram conceptually showing the flow of rubber into recesses in a tire mold. FIG. 4 is a diagram conceptually showing rubber flow through a groove into a recess in a tire mold. FIG. 3 is a view similar to FIG. 2 showing a pneumatic tire according to a modified example. FIG. 3 is a view similar to FIG. 2 showing a pneumatic tire according to another modified example. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6 . FIG. 3 is a view similar to FIG. 2 showing a pneumatic tire according to a further modified example.

Embodiments of the present invention will now be described with reference to the accompanying drawings. Note that the following description is essentially merely illustrative and is not intended to limit the present invention, its applications, or its uses. The drawings are schematic, and the ratios of dimensions, etc., differ from the actual ones.

Figure 1 is a cross-sectional view in the meridian direction of a pneumatic tire 1 according to one embodiment of the present invention, showing only one side of the tire equator CL. As shown in Figure 1, the pneumatic tire 1 has a tread 2 extending in the tire width direction, a pair of tire side portions 3 extending radially inward from the tire width direction outer end of the tread 2, and a pair of bead portions 4 located at the tire radially inner end of each of the pair of tire side portions 3. Shoulder blocks 2a are formed in the tread 2 and are partitioned in the tire circumferential direction.

A bead core 4a and a bead filler 4b connected to the outer diameter side end face of the bead core 4a are embedded in the pair of bead portions 4. A carcass ply 5 is laid between the pair of bead portions 4. An inner liner 8 is arranged on the tire radially inner side of the carcass ply 5. Two belt layers 6 and a cap ply 7 are arranged in order from the tire radially inner side on the tire radially outer side of the carcass ply 5. A tread 2 is arranged on the tire radially outer side of the cap ply 7.

The tire side portion 3 has a basic profile surface 3a on the outer surface on the outer side in the tire width direction, which extends along the carcass ply 5. In this specification, the basic profile surface 3a refers to the portion of the outer surface of the tire side portion 3 on which no convex or concave portions are formed.

The tire side portion 3 further has a protrusion 10 that protrudes outward in the tire width direction from the basic profile surface 3a. In this embodiment, the protrusion 10 is configured as a traction element in the tire side portion when traveling on rocky terrain, but it may also be configured as a design element.

2 is a perspective view of the periphery of the protruding portion 10 as seen from the outside in the tire radial direction, as viewed from the A arrow in FIG. 1. In the following, the left side in FIG. 2 is the front side and the right side is the rear side in the tire circumferential direction, but the present invention is not limited to the tire circumferential direction. As shown in FIG. 2, the protruding portion 10 has a top surface 11 that protrudes outward in the tire width direction and faces the outside in the tire width direction, a front side surface 12 that extends from the front end of the top surface 11 in the tire circumferential direction to the inside in the tire width direction and extends to the tire side portion 3, a rear side surface 13 that extends from the rear end of the top surface 11 in the tire circumferential direction to the inside in the tire width direction and extends to the tire side portion 3, and an outer side surface 14 that extends from the outer diameter side end of the top surface 11 in the tire radial direction to the inside in the tire width direction and extends to the tire side portion 3.

The tire side portion 3 has a plurality of protrusions 20 formed between the front side surface 12 of the protrusion 10 and the basic profile surface 3a, connecting them in a diagonal brace manner. In this embodiment, the plurality of protrusions 20 are all formed in the same shape. Each protrusion 20 is formed in a thin plate shape and extends in the tire circumferential direction with its thickness direction facing the tire radial direction. The protrusions 20 are formed to a substantially constant thickness T. The thickness T is 1 mm or more and 10 mm or less, and 5% or more and 40% or less of the length of the protrusion 10 in the tire radial direction. The plurality of protrusions 20 are spaced apart from each other at substantially equal intervals in the tire radial direction.

Figure 3 is a cross-sectional view taken along line III-III in Figure 2, showing the periphery of the front side surface 12 of the protrusion 10 as viewed from the tire radial direction. As shown in Figure 3, the protrusion 20 is formed so that its height increases from the basic profile surface 3a outward in the tire width direction toward the protrusion 10 in the tire circumferential direction (i.e., toward the rear in the tire circumferential direction). The length L of the protrusion 20 in the tire circumferential direction is 3 mm or more and 30 mm or less. The height H of the protrusion 20 in the tire width direction is 1 mm or more and 10 mm or less, and is 30% or more and 100% or less of the height of the protrusion 10 in the tire width direction.

The ridges 20 are curved so as to be concave inward in the tire width direction. In other words, the ridges 20 have a center of curvature on the outer side in the tire width direction. Both the joint 21 with the base profile surface 3a and the joint 22 with the front side 12 of the protruding portion 10 of the ridges 20 are curved so as to be concave inward in the tire width direction. The joints 21 and 22 are connected tangentially and continuously to the base profile surface 3a and the front side 12, respectively.

The flow of rubber when vulcanizing the pneumatic tire 1 will be described with reference to Figures 4A and 4B. Figures 4A and 4B are cross-sectional views of the main parts of a tire mold 60 for vulcanizing the pneumatic tire 1. Specifically, Figure 4A is a cross-sectional view along the tire circumferential direction corresponding to Figure 3, and Figure 4B is a cross-sectional view along the tire circumferential direction at a position corresponding to the protrusion 20.

As shown in Figures 4A and 4B, the tire mold 60 has a basic molding surface 61 for molding the basic profile surface 3a of the tire side portion 3, a recessed portion 62 recessed outward in the tire width direction from the basic molding surface 61 for molding the protrusion 10, and a groove portion 63 formed in a groove shape connecting the recessed portion 62 and the basic molding surface 61 for molding the protrusion 20. The groove portion 63 is provided for each protrusion 20. The depth of the groove portion 63 increases toward the recessed portion 62.

In the cross section shown in Figure 4A, i.e., in a cross section where the groove portion 63 is not formed, the rubber R that flows along the basic molding surface 61 during vulcanization molding in the tire mold 60 flows directly into the recessed portion 62 (arrow F1). On the other hand, in the cross section shown in Figure 4B, i.e., in a cross section where the groove portion 63 is formed, the rubber R that flows along the basic molding surface 61 during vulcanization molding in the tire mold 60 not only flows directly into the recessed portion 62 (arrow F1), but also flows into the recessed portion 62 via the groove portion 63 (arrow F2).

The pneumatic tire 1 according to the above embodiment has the following advantages:

(1) The protrusion 20 connects the front surface 12 of the convex portion 10 to the basic profile surface 2a, improving the rigidity of the convex portion 10.

In addition, in the tire mold 60 for molding the pneumatic tire 1, the grooves 63 for forming the protrusions 20 are formed so as to communicate between the basic molding surface 61 and the recesses 62 for molding the protrusions 10. As a result, when a green tire is vulcanized in the tire mold 60, the flowing rubber can easily flow into the recesses 62 via the grooves 63.

Furthermore, by configuring the portion connecting the protrusion 10 and the basic profile surface 3a as a ridge 20, the volume of the groove 63 is not excessively large compared to when the entire front side surface 12 of the protrusion 10 is connected to the basic profile surface 3a, and therefore the amount of rubber required to fill the groove 63 during vulcanization molding is not excessive. This suppresses poor rubber flow into the recess 62, thereby suppressing bear-in defects in the vulcanized pneumatic tire 1. Therefore, the rigidity of the protrusion 10 can be increased while suppressing bear-in defects.

(2) The ridges 20 are arranged in a diagonal brace between the basic profile surface 3a and the protrusions 10, so that the ridges 20 can effectively support the protrusions 10. Furthermore, in the tire mold 60, the grooves 63 for forming the ridges 20 increase in depth toward the recesses 62. Therefore, when a green tire is vulcanized in the tire mold 60, the rubber flowing along the basic molding surface 61 can be caused to gradually flow into the grooves 63 and then smoothly flow into the recesses 62 via the grooves 63.

(3) As shown in FIG. 3, the cross-sectional shape of the ridges 20 along the extension direction is curved so as to be concave inward in the tire width direction, suppressing an increase in the volume of the ridges 20. This prevents the volume of the grooves 63 in the tire mold 60 from becoming excessively large, so that the rubber filled in the grooves 63 during vulcanization molding does not become excessively large, suppressing poor filling of the rubber into the recesses 62.

(4) As shown in FIG. 3, in the cross-sectional shape along the extension direction of the ridge 20, the joint 21 with the base profile surface 2a and the joint 22 with the front side surface 12 are curved so as to be concave inward in the tire width direction. This reduces stress concentration at the joints 21, 22 between the ridge 20 and the base profile surface 2a and the front side surface 12 when a load is applied to the protrusion 10. This suppresses cracks at the joints 21, 22.

(5) Since multiple ridges 20 are provided in an arrangement direction (tire radial direction) perpendicular to the extension direction, the multiple ridges 20 can more effectively improve the rigidity of the convex portion 10. Furthermore, in the tire mold 60, the rubber flowing along the basic molding surface 61 can be easily introduced into the concave portion 62 via the multiple grooves 63. This reduces the possibility of the rubber being improperly filled into the concave portion 62.

(6) The thickness T of the protrusion 20 is set to 1 mm or more and 10 mm or less, and 5% or more and 40% or less of the tire radial length of the protrusion 10, so that the protrusion 20 effectively improves the rigidity of the protrusion 10 and suppresses insufficient filling of the recess 62 with rubber. If the thickness T is less than 1 mm or less than 5% of the tire radial length of the protrusion 10, the rigidity improving effect of the protrusion 20 is insufficient. On the other hand, if the thickness T is more than 10 mm or more than 40% of the tire radial length of the protrusion 10, the rigidity of the protrusion 20 tends to be locally excessively high, and the rigidity of the protrusion 10 becomes non-uniform.

(7) The length L of the ridges 20 is set to 3 mm or more and 30 mm or less, so that the ridges 20 can improve the rigidity of the convex portion 10 and suppress the insufficient filling of the rubber into the concave portion 62 at a high level. If the length L is less than 3 mm, the rigidity improvement effect and the effect of suppressing the insufficient filling of the rubber into the concave portion 62 will be small and insufficient. On the other hand, if the length L exceeds 30 mm, the ridges 20 tend to locally increase the rigidity excessively, causing the rigidity of the convex portion 10 to become non-uniform.

(8) The height H of the ridges 20 is set to 1 mm or more and 10 mm or less, and 30% or more and 100% or less of the height of the protrusions 10 in the tire width direction, so that the ridges 20 effectively suppress insufficient filling of the rubber into the recesses 62. If the height H is less than 1 mm or less than 30% of the height of the protrusions 10, the effect of improving rigidity and the effect of suppressing insufficient filling of the rubber into the recesses 62 will be insufficient.

Figure 5 is a perspective view of a pneumatic tire 1 similar to that of Figure 2, showing multiple ridges 30 according to a modified example. The ridges 30 differ from the ridges 20 in that the thickness T increases toward the front in the tire circumferential direction (i.e., as it moves away from the protruding portion 10).

The protrusions 30 make it easier for the rubber flowing along the basic molding surface 61 to be efficiently introduced into the grooves 63 in the tire mold 60. On the other hand, the connection portion to the recesses 62 increases in height from the basic molding surface 61, but is configured to be relatively narrow, preventing the volume of the grooves 63 from becoming excessive. Therefore, the shallow portions of the grooves 63 are formed wide, while the deep portions are formed narrow. This prevents the grooves 63 from becoming excessively large, while preventing poor filling of the rubber into the recesses 62.

Figure 6 is a perspective view of a pneumatic tire 1 similar to that of Figure 2, showing multiple ridges 40 according to another modified example. Figure 7 is a cross-sectional view similar to that of Figure 3, taken along line VII-VII in Figure 6. As shown in Figures 6 and 7, the multiple ridges 40 are not all formed in the same shape, and the multiple ridges 20 differ in that they include first ridges 41 and second ridges 42 that have different shapes.

The first ridges 41 are configured such that the length L1 in the tire circumferential direction is longer than the length L2 of the second ridges 42, while the height H2 in the tire width direction of the second ridges 42 is longer than the height H1 of the first ridges 41. The first ridges 41 and the second ridges 42 are arranged alternately in the tire radial direction.

The multiple ridges 40 have different end positions in the tire circumferential direction and in the height direction of the front side surface 12, so that when a load is applied to the protrusion 10, the ends 41a, 41b and 42a, 42b of the first ridge 41 and the second ridge 42, where stress is likely to concentrate, can be dispersed in the tire circumferential direction and in the height direction of the protrusion 10. This suppresses cracks at the ends 41a, 41b and 42a, 42b.

Furthermore, since the second ridges 42 are high from the basic profile surface 3a, it is easy to improve the rigidity of the protrusions 10. On the other hand, since the first ridges 41 are long along the basic profile surface 3a, in the tire mold 60, the rubber flowing along the basic molding surface 61 is easily caused to flow into the grooves 63 for forming the first ridges 41 early, and the rubber flow into the recesses 62 is easily accelerated. Furthermore, since the second ridges 42 are high but short in the tire circumferential direction, while the first ridges 41 are long in the tire circumferential direction but formed low, the volume of the first ridges 41 and the second ridges 42 is prevented from becoming excessively large. Therefore, it is easy to achieve both improvement of the rigidity of the protrusions 10 and prevention of insufficient filling of the rubber into the recesses 62 at a high level.

The first ridges 41 and the second ridges 42 are arranged alternately in the tire radial direction. Therefore, since the first ridges 41 and the second ridges 42 are provided in a well-balanced manner, it is easy to uniformly suppress poor filling of the rubber into the recesses 62 in the tire mold 60 in the tire radial direction while uniformly improving the rigidity of the protrusions 10 in the tire radial direction.

Figure 8 is a perspective view of the pneumatic tire 1 similar to Figure 2, showing multiple ridges 50 according to a further modified example. As shown in Figure 8, the multiple ridges 50 have first ridges 51 and second ridges 52 alternately arranged in the tire radial direction, like the multiple ridges 40, but differ from the first ridges 41 in that the first ridges 51 are formed wider toward the front side in the tire circumferential direction. In other words, the first ridges 51 and second ridges 52 have different widths, and the first ridges 51, which are shorter, are formed wider, while the second ridges 52, which are taller, are formed narrower.

The first ridge 51 provides the same effect as the ridge 30 according to the above modification. Furthermore, the second ridge 52 provides the same effect as the second ridge 42. Therefore, the second ridge 52 improves the rigidity of the protrusion 10, while the first ridge 51 promotes the flow of rubber into the recess 62, suppressing poor filling. In addition, since the first ridge 51 and the second ridge 52 have different widths, when a load is applied to the protrusion 10, the stress concentrated on the respective ends 51a, 51b and 52a, 52b is easily dispersed to the first ridge 51 and the second ridge 52, which have different widths. This suppresses cracks at the ends 51a, 51b and 52a, 52b.

The present invention is not limited to the configuration described in the above embodiment, and various modifications are possible.

In the above embodiment, the protrusion 20 is provided to connect the front side surface 12 of the protrusion 10 and the basic profile surface 3a, but this is not limited to the above. The protrusion may be formed to connect any side surface of the protrusion 10 and the basic profile surface 3a. In this case, the direction in which the protrusion is provided may be considered in consideration of the removal of the tire mold 60. For example, when at least the tire radial outer end of the protrusion 10 is vulcanized using a sector mold, if a protrusion is formed between the outer side surface 14 of the protrusion 10 and the basic profile surface 3a, the protrusion may be formed to extend in the tire radial direction.

Reference Signs List 1 Pneumatic tire 3 Tire side portion 3a Basic profile surface 10 Convex portion 11 Top surface 12 Front side surface 13 Rear side surface 14 Outer side surface 20, 30, 40, 50 Protrusions 21, 22 Joint portion 60 Tire mold 61 Basic molding surface 62 Concave portion 63 Groove portion

Claims (7)

A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
and a protrusion connecting a side surface of the protrusion and the basic profile surface,
The protrusions have a height from the basic profile surface to the outside in the tire width direction, the height increasing toward the side surface, and extend in a tire circumferential direction. A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
and a protrusion connecting a side surface of the protrusion and the basic profile surface,
The protrusion has a height from the basic profile surface to an outer side in the tire width direction, the height increasing toward the side surface,
The pneumatic tire, wherein a cross-sectional shape of the protrusion along an extension direction is curved so as to be concave inward in a tire width direction. In a cross-sectional shape along the extension direction of the protrusion, a joint portion with the basic profile surface and/or a joint portion with the side surface is curved so as to be recessed inward in the tire width direction.
The pneumatic tire according to claim 2. A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
A pneumatic tire having a protrusion connecting a side surface of the protruding portion and the basic profile surface,
The protrusion has a height from the basic profile surface to an outer side in the tire width direction, the height increasing toward the side surface,
The protrusion has a width, in a side view of the pneumatic tire, that increases with increasing distance from the side surface in an extension direction. A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
and a protrusion connecting a side surface of the protrusion and the basic profile surface,
The protrusions are provided in a plurality of directions perpendicular to the direction of extension toward the side surface,
The plurality of protrusions include at least two types of protrusions having different heights from the basic profile surface toward an outer side in the tire width direction and different lengths in the extension direction,
the at least two types of ridges include first ridges and second ridges,
The height of the first protrusion is greater than the height of the second protrusion,
The second ridges have a length longer than that of the first ridges. A convex portion protruding outward in the tire width direction from a basic profile surface on a tire side portion;
A pneumatic tire having a protrusion connecting a side surface of the protruding portion and the basic profile surface,
The protrusions are provided in a plurality of directions perpendicular to the direction of extension toward the side surface,
The plurality of ridges include first ridges and second ridges that have different widths in a side view of the pneumatic tire. The plurality of protrusions include the first protrusions and the second protrusions alternately in the arrangement direction.
The pneumatic tire according to claim 5 or 6.

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