An ultra-high performance tire pattern and tire
By using an asymmetric dual-pitch tread pattern design and a groove connection structure, the problem of insufficient wet grip and dry braking performance of existing ultra-high performance tires under extreme conditions has been solved, achieving better wet drainage, grip and dry braking performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO DOUBLESTAR TIRE IND CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-05
AI Technical Summary
Existing ultra-high performance tires struggle to simultaneously achieve both wet grip and dry braking performance under extreme conditions.
It adopts an asymmetrical dual-pitch tread pattern design, with the center line of the tread serving as the dividing line. The inner tread blocks have a smaller area and the groove area is larger, while the outer tread blocks have a larger area. Combined with the interconnected design of multiple longitudinal and lateral grooves, it increases wet drainage performance and grip performance, and enhances handling performance through a chamfered structure.
It improves the tire's drainage and grip performance on wet roads, while also enhancing braking and handling performance on dry roads.
Smart Images
Figure CN224323782U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tire technology, and in particular relates to an ultra-high performance tire tread pattern and tire. Background Technology
[0002] With the rapid development of the automotive market, consumers' demands for vehicle performance are constantly increasing. As the only component of a car in contact with the ground, tires have a significant impact on various aspects of a vehicle's performance. When a vehicle is driving under extreme conditions, its safety and dynamic response capabilities are extremely important. Ultra-high performance tires (UHP) are specifically designed to cope with extreme driving conditions. The current market has set more stringent standards for the overall performance of tires under extreme conditions, requiring them to quickly drain water and improve anti-skid performance on wet roads, while also maintaining grip and improving braking performance on dry roads. Therefore, there is an urgent need for an ultra-high performance tire that simultaneously possesses excellent wet grip and dry braking performance to meet current market demands. Utility Model Content
[0003] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.
[0004] This invention addresses the problem that existing ultra-high performance tires cannot simultaneously achieve both wet grip and dry braking performance. It proposes an ultra-high performance tire tread pattern and tire that improves the tire's wet performance, grip, and handling performance under extreme driving conditions.
[0005] This utility model discloses an ultra-high performance tire tread pattern. The ultra-high performance tire tread pattern is distributed along the tire circumference with pitch lengths including pitch A and pitch B. Taking the center line of the tread as the dividing line, each pitch tread pattern is divided into an inner tread area and an outer tread area. The area of the inner tread block of pitch A accounts for 66%-68% of the total area of the inner tread area of pitch A, and the area of the outer tread block of pitch A accounts for 70%-72% of the total area of the outer tread area of pitch A. Similarly, the area of the inner tread block of pitch B accounts for 68%-70% of the total area of the inner tread area of pitch B, and the area of the outer tread block of pitch B accounts for 70%-71% of the total area of the outer tread area of pitch B.
[0006] In some embodiments, the ultra-high performance tire tread pattern includes multiple longitudinal grooves extending circumferentially along the tread surface. These longitudinal grooves divide the tread surface into a first tread area, a second tread area, a third tread area, a fourth tread area, and a fifth tread area from the inside out. The width of the first tread area accounts for 19%-20% of the tire's tread width (TAW), the second tread area accounts for 13%-14% of the TAW, the third tread area accounts for 12%-13% of the TAW, the fourth tread area accounts for 13%-14% of the TAW, and the fifth tread area accounts for 18%-19% of the TAW.
[0007] In some embodiments, the longitudinal groove includes a first longitudinal groove disposed between the first patterned area and the second patterned area, a second longitudinal groove disposed between the second patterned area and the third patterned area, a third longitudinal groove disposed between the third patterned area and the fourth patterned area, and a fourth longitudinal groove disposed between the fourth patterned area and the fifth patterned area; wherein the width W1 of the first longitudinal groove, the width W2 of the second longitudinal groove, the width W3 of the third longitudinal groove, and the width W4 of the fourth longitudinal groove satisfy W2=W3>W1>W4, and (W1+W2+W3+W4)=TAW×(22%-23%).
[0008] In some embodiments, a plurality of through first transverse grooves are provided at intervals on the first patterned area, and a through third steel sheet is provided between adjacent first transverse grooves. A fourth steel sheet and a fifth steel sheet are provided on both sides of the third steel sheet, respectively.
[0009] In some embodiments, a plurality of second lateral grooves and third lateral grooves are alternately provided on the second tread area, wherein the second lateral grooves are inverted V-shaped, and the width of the second lateral groove near the edge of the tread is greater than the width of the second lateral groove near the center line of the tread.
[0010] In some embodiments, a sixth steel sheet with a zigzag structure is provided between adjacent second and third transverse grooves, and a plurality of seventh steel sheets are provided between adjacent sixth steel sheets.
[0011] In some embodiments, a plurality of fourth lateral grooves and fifth lateral grooves are alternately spaced on the third tread area, and a plurality of straight steel strips are alternately spaced between adjacent fourth lateral grooves and fifth lateral grooves. The end of the fourth lateral groove near the center line of the tread is connected to the adjacent longitudinal groove through a first steel strip.
[0012] In some embodiments, a sixth lateral groove and a seventh lateral groove are alternately spaced on the fourth tread area, and a tenth steel sheet is provided between adjacent sixth and seventh lateral grooves. The end of the sixth lateral groove away from the tread centerline is connected to the adjacent longitudinal groove, and the opening of the connection end between the sixth lateral groove and the adjacent longitudinal groove is provided with a first chamfer and a second chamfer with gradually changing width on both sides. The other end of the sixth lateral groove is connected to the adjacent longitudinal groove through a second steel sheet. The end of the seventh lateral groove away from the tread centerline is connected to the adjacent longitudinal groove, and the opening of the connection end between the seventh lateral groove and the adjacent longitudinal groove is provided with a third chamfer and a fourth chamfer with gradually changing width on both sides.
[0013] In some embodiments, a plurality of eighth lateral grooves are spaced apart on the fifth tread area, and an eleventh steel sheet is provided between adjacent eighth lateral grooves. The end of the eighth lateral groove near the center line of the tread is connected to the adjacent longitudinal groove, and a fifth chamfer and a sixth chamfer are provided on both sides of the opening at the connection end of the eighth lateral groove and the adjacent longitudinal groove.
[0014] In another aspect, this utility model also provides a tire, including a tread, on which any of the above-mentioned ultra-high performance tire patterns are provided.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] (1) The ultra-high performance tire pattern of this utility model adopts an asymmetrical double pitch design. With the center line of the tread as the dividing line, the inner tread block area of each pitch is small and the groove area is large, which can increase the drainage performance of the tire on wet roads and improve the wet performance of the tire; the outer tread block area of each pitch is large, which can increase the contact area of the tire when turning and improve the grip performance of the tire.
[0017] (2) The first, second, third, fourth and fifth transverse grooves of the ultra-high performance tire pattern of this utility model are connected by longitudinal grooves on the inner side of the tire tread. While increasing the groove area, it is conducive to accelerating drainage and can also bring a sense of speed - the intuitive visual feeling of faster drainage.
[0018] (3) The ultra-high performance tire pattern of this utility model has a chamfered structure on both sides of the sixth, seventh and eighth lateral grooves located on the outer side of the tread, which can increase the contact area of the tire and increase the handling performance of the tire. Attached Figure Description
[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with their descriptions, serve to explain the present invention and do not constitute an undue limitation thereof. Wherein:
[0020] Figure 1 This is a schematic diagram of the structure of the ultra-high performance tire tread pattern provided in an embodiment of the present utility model;
[0021] Figure 2 A schematic diagram of the structure of the sixth transverse groove of the ultra-high performance tire tread provided in this embodiment of the utility model;
[0022] Figure 3 A schematic diagram of the structure of the seventh transverse groove of the ultra-high performance tire tread provided in this embodiment of the utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the eighth transverse groove of the ultra-high performance tire tread provided in an embodiment of the present invention;
[0024] In the attached image:
[0025] 11. First pattern area; 12. Second pattern area; 13. Third pattern area; 14. Fourth pattern area; 15. Fifth pattern area;
[0026] 21. First longitudinal groove; 22. Second longitudinal groove; 23. Third longitudinal groove; 24. Fourth longitudinal groove;
[0027] 31. First transverse groove; 32. Second transverse groove; 33. Third transverse groove; 34. Fourth transverse groove; 35. Fifth transverse groove; 36. Sixth transverse groove; 37. Seventh transverse groove; 38. Eighth transverse groove.
[0028] 41. First steel sheet; 42. Second steel sheet; 43. Third steel sheet; 44. Fourth steel sheet; 45. Fifth steel sheet; 46. Sixth steel sheet; 47. Seventh steel sheet; 48. Eighth steel sheet; 49. Ninth steel sheet; 410. Tenth steel sheet; 411. Eleventh steel sheet.
[0029] 51. First chamfer, 52. Second chamfer, 53. Third chamfer, 54. Fourth chamfer, 55. Fifth chamfer, 56. Sixth chamfer. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments.
[0031] The terms "a," "an," "a kind," "the," and similar words used in this utility model do not indicate quantity limitation and can represent singular or plural. The terms "comprising," "including," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion. The terms "first," "second," "third," etc., used in this utility model are merely to distinguish similar objects and do not represent a specific ordering of objects. In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "upper," "lower," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The term "longitudinal" refers to the direction in which the tire rolls; the term "lateral" refers to the direction perpendicular to the mid-surface of the tire.
[0032] This utility model embodiment provides an ultra-high performance tire tread pattern and tire, which features an asymmetrical tread structure and a dual-pitch tread design. Figure 1 This is a schematic diagram of the structure of an ultra-high performance tire tread pattern according to an embodiment of the present invention. (Reference) Figure 1 As shown, the ultra-high performance tire tread pattern of this utility model adopts a dual-pitch tread pattern design, including pitch A and pitch B. With the center line of the tread as the dividing line, pitch A and pitch B are respectively divided into an inner tread area and an outer tread area. The area of the inner tread block of pitch A accounts for 66%-68% of the total area of the inner tread area of pitch A, and the area of the outer tread block of pitch A accounts for 70%-72% of the total area of the outer tread area of pitch A. Similarly, the area of the inner tread block of pitch B accounts for 68%-70% of the total area of the inner tread area of pitch B, and the area of the outer tread block of pitch B accounts for 70%-71% of the total area of the outer tread area of pitch B.
[0033] This utility model features an asymmetrical tread pattern for ultra-high performance tires, comprising multiple longitudinal grooves extending circumferentially along the tire tread. These longitudinal grooves divide the tire tread into a first tread area 11, a second tread area 12, a third tread area 13, a fourth tread area 14, and a fifth tread area 15, from the inside out. The first tread area 11 occupies 19%-20% of the tire's tread width (TAW), the second tread area 12 and the fourth tread area 14 each occupy 13%-14% of the tire's tread width (TAW), the third tread area 13 occupies 12%-13% of the tire's tread width (TAW), and the fifth tread area 15 occupies 18%-19% of the tire's tread width (TAW). In this invention, the first tread area 11 and the fifth tread area 15 are shoulder tread areas, which have a larger width. The wider shoulder rib design can provide stronger lateral support, allowing the vehicle to better resist lateral forces when turning, making the vehicle's handling more stable. The second tread area 12, the third tread area 13, and the fourth tread area 14 are center tread areas. The center tread area adopts a narrower tread rib design, which can make the tire more flexible when turning, making the vehicle's response speed faster, reducing steering lag, and improving responsiveness.
[0034] The longitudinal grooves of the ultra-high performance tire tread of this utility model include a first longitudinal groove 21 disposed between a first tread area 11 and a second tread area 12, a second longitudinal groove 22 disposed between a second tread area 12 and a third tread area 13, a third longitudinal groove 23 disposed between a third tread area 13 and a fourth tread area 14, and a fourth longitudinal groove 24 disposed between a fourth tread area 14 and a fifth tread area 15; wherein, the width of the first longitudinal groove 21 is W1, and the width of the second longitudinal groove 22 is W1. The widths W2, W3, and W4 of the second longitudinal groove 22, the third longitudinal groove 23, and the fourth longitudinal groove 24 satisfy the following relationship: the width W2 of the second longitudinal groove 22 is equal to the width W3 of the third longitudinal groove 23, which is greater than the width W1 of the first longitudinal groove 21, which is greater than the width W4 of the fourth longitudinal groove 24. Furthermore, the sum of the widths of the four main grooves accounts for 22%-23% of the TAW width, i.e., W2 = W3 > W1 > W4, and (W1 + W2 + W3 + W4) = TAW × (22% - 23%). In this invention, the second longitudinal groove 22 and the third longitudinal groove 23 are central grooves. The wider central groove design provides better drainage performance for the tire, ensuring that water between the tire and the ground can be quickly discharged when the vehicle is driving on a wet and slippery road surface, thereby enhancing the tire's wet performance. The relatively narrow first longitudinal groove 21 and fourth longitudinal groove 24 on both sides of the central groove help to improve the tire's rigidity and stability, and provide better force and torque transmission when the vehicle is turning, accelerating, and braking, thus providing more comprehensive driving performance protection for the vehicle.
[0035] The first tread area 11 of this high-performance tire pattern features multiple first lateral grooves 31 spaced apart. The angle between the line connecting the two endpoints of each first lateral groove 31 and the center line CL of the tire tread is 14°-16°. Each first lateral groove 31 is a lateral groove composed of two parallel arc lines, with the radii of the two arcs differing by 34mm-36mm. One end of each first lateral groove 31 connects to an adjacent first longitudinal groove 21, and the other end extends towards the edge of the tire tread. A third steel sheet 43 is provided between adjacent first lateral grooves 31. The third steel sheet 43 has a curved structure, with one end connected to the adjacent first longitudinal groove 31 and the other end extending towards the edge of the tire tread. A fourth steel sheet 44 and a fifth steel sheet 45 are provided on both sides of the third steel sheet 43. Both the fourth and fifth steel sheets 44 and 45 have a wavy structure and are semi-closed.
[0036] The second tread area 12 of this high-performance tire pattern features alternating second lateral grooves 32 and third lateral grooves 33. The second lateral grooves 32 are located on pitch A and are in an inverted V-shape. The width of the second lateral groove 32 near the tread edge is greater than the width of the second lateral groove 32 near the tread centerline CL. The angle between the wider end of the second lateral groove 32 and the first longitudinal groove 21 is 67°-70°. The angle between the narrower end of the second lateral groove 32 and the second longitudinal groove 22 is 67°-70°. The included angle is 65°-67°; the two ends of the second transverse groove 32 are through-type, one end of the second transverse groove 32 is connected to the first longitudinal groove 21, and the other end of the second transverse groove 32 is connected to the second longitudinal groove 22; the third transverse groove 33 is located on pitch B and is a semi-closed structure, one end of the third transverse groove 33 is connected to the adjacent first longitudinal groove 21, and the included angle between the third transverse groove 33 and the first longitudinal groove 21 is 67°-70°; the other end of the third transverse groove 33 is a closed structure. A sixth steel plate 46 is provided between the second transverse groove 32 and the third transverse groove 33 within the same pitch. The sixth steel plate 46 is inverted V-shaped, and at least one seventh steel plate 47 is provided between adjacent sixth steel plates 46. The seventh steel plate 47 is wavy and is a semi-closed structure.
[0037] The third tread area 13 of this utility model's ultra-high performance tire tread pattern is alternately provided with multiple fourth lateral grooves 34 and fifth lateral grooves 35. From the center line CL near the tread edge towards the tread edge, the width of the fourth lateral grooves 34 gradually widens. One end of the fourth lateral groove 34 is connected to the adjacent second longitudinal groove 22, and the other end of the fourth lateral groove 34 is a closed structure. The closed end of the fourth lateral groove 34 is connected to the first steel sheet 41, and the other end of the first steel sheet 41 is connected to the adjacent third longitudinal groove 23. The included angle between the first steel sheet 41 and the third longitudinal groove 23 is 67°-68°. The fifth lateral groove 35 is a semi-closed structure. One end of the fifth lateral groove 35 is connected to the adjacent second longitudinal groove 22, and the other end of the fifth lateral groove 35 is a closed structure. Multiple straight steel strips are spaced apart between the fourth lateral groove 34 and the fifth lateral groove 35 within the same pitch. The straight steel strips include an eighth steel strip 48 located inside the tread centerline CL and a ninth steel strip 49 located outside the tread centerline CL. In a preferred embodiment, there are two ninth steel strips 49, which are arranged alternately with the eighth steel strip 48 on both sides of the tread centerline CL.
[0038] The fourth tread zone 14 of this utility model's ultra-high performance tire tread pattern is alternately provided with a sixth lateral groove 36 and a seventh lateral groove 37. The end of the sixth lateral groove 36 furthest from the tread centerline is connected to the adjacent fourth longitudinal groove 24, and the opening at the connection point of the sixth lateral groove 36 and the fourth longitudinal groove 24 has a first chamfer 51 and a second chamfer 52 with gradually changing widths on both sides. The other end of the sixth lateral groove 36 is a closed structure, and the closed end of the sixth lateral groove 36 near the tread centerline CL is connected to a second steel sheet. 42. The other end of the second steel sheet 42 is connected to the third longitudinal groove 23, and the included angle between the second steel sheet 42 and the third longitudinal groove 23 is 66°-67°; one end of the seventh transverse groove 37 is connected to the adjacent fourth longitudinal groove 24, and the opening at the connection end of the seventh transverse groove 37 and the fourth longitudinal groove 24 is provided with a third chamfer 53 and a fourth chamfer 54 with gradually changing width on both sides; the other end of the seventh transverse groove 37 is a closed structure; the included angle between the seventh transverse groove 37 and the fourth longitudinal groove 54 is 112°-113°. A tenth steel sheet 410 is provided between the sixth transverse groove 36 and the seventh transverse groove 37, and the two ends of the tenth steel sheet 410 are connected to the adjacent third longitudinal groove 23 and the fourth longitudinal groove 24 respectively, forming a through straight structure.
[0039] The fifth tread zone 15 of this high-performance tire pattern features multiple eighth lateral grooves 38 spaced apart. These eighth lateral grooves 38 are centrally symmetrical to the first lateral grooves 31, meaning they are obtained by rotating the first lateral groove 31 180° around the tread centerline CL. One end of each eighth lateral groove 38 connects to an adjacent fourth longitudinal groove 24. A fifth chamfer 55 and a sixth chamfer 56 are located on both sides of the eighth lateral groove 38 near the fourth longitudinal groove 24, forming a lightning bolt-shaped structure. The other end of the eighth lateral groove 38 extends towards the tread edge. A through eleventh steel sheet 411 is positioned between adjacent eighth lateral grooves 38. The eleventh steel sheet 411 has a curved structure, with one end connected to an adjacent fourth longitudinal groove 24 and the other end extending towards the tread edge.
[0040] This invention also provides a tire with the aforementioned ultra-high performance tire tread pattern on its tread. Through an asymmetrical dual-pitch design, the inner tread blocks, with a smaller area and larger groove area (using the center line as the decomposition point), increase the tire's drainage performance on wet roads and improve its wet-weather performance. The outer tread blocks, with their larger area, increase the tire's contact patch during cornering, improving grip. Furthermore, the inner tread grooves mostly employ smooth curves and dynamic wave lines, increasing the groove area while also providing a sense of speed and visually stimulating drainage. The outer tread patterns are mostly composed of straight lines, giving a robust visual impression. Combined with the chamfered design of the outer lateral grooves, this increases the tire's contact patch and enhances handling performance.
[0041] The above-described embodiments only illustrate several implementation methods of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A high-performance tire tread pattern, characterized in that: The tread pattern of ultra-high performance tires is distributed along the tire circumference in pitch lengths, including pitch A and pitch B. Using the tread centerline as the dividing line, each pitch is divided into an inner tread area and an outer tread area. Specifically, the inner tread block area of pitch A accounts for 66%-68% of the total area of the inner tread area of pitch A, and the outer tread block area accounts for 70%-72% of the total area of the outer tread area of pitch A. Similarly, the inner tread block area of pitch B accounts for 68%-70% of the total area of the inner tread area of pitch B, and the outer tread block area accounts for 70%-71% of the total area of the outer tread area of pitch B.
2. The ultra-high performance tire tread pattern according to claim 1, characterized in that: Ultra-high performance tire tread patterns include multiple longitudinal grooves extending circumferentially along the tread. These longitudinal grooves divide the tread into five tread zones from the inside out: the first tread zone, the second tread zone, the third tread zone, the fourth tread zone, and the fifth tread zone. The width of the first tread zone accounts for 19%-20% of the tire's tread width (TAW), the second tread zone accounts for 13%-14%, the third tread zone accounts for 12%-13%, the fourth tread zone accounts for 13%-14%, and the fifth tread zone accounts for 18%-19%.
3. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The longitudinal groove includes a first longitudinal groove disposed between the first pattern area and the second pattern area, a second longitudinal groove disposed between the second pattern area and the third pattern area, a third longitudinal groove disposed between the third pattern area and the fourth pattern area, and a fourth longitudinal groove disposed between the fourth pattern area and the fifth pattern area; wherein the width W1 of the first longitudinal groove, the width W2 of the second longitudinal groove, the width W3 of the third longitudinal groove, and the width W4 of the fourth longitudinal groove satisfy W2=W3>W1>W4, and (W1+W2+W3+W4)=TAW×(22%-23%).
4. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The first patterned area has multiple through first transverse grooves spaced apart, and a through third steel sheet is set between adjacent first transverse grooves. A fourth steel sheet and a fifth steel sheet are set on both sides of the third steel sheet respectively.
5. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The second tread area is provided with multiple alternating second lateral grooves and third lateral grooves. The second lateral grooves are in the shape of an inverted V, and the width of the second lateral groove near the edge of the tread is greater than the width of the second lateral groove near the center line of the tread.
6. The ultra-high performance tire tread pattern according to claim 5, characterized in that: A sixth steel sheet with a zigzag structure is set between adjacent second and third transverse grooves, and multiple seventh steel sheets are set between adjacent sixth steel sheets.
7. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The third tread pattern area has multiple fourth and fifth lateral grooves alternately spaced, and multiple straight steel pieces are staggered between adjacent fourth and fifth lateral grooves. The end of the fourth lateral groove near the center line of the tread is connected to the adjacent longitudinal groove through the first steel piece.
8. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The fourth tread pattern area is provided with alternating sixth and seventh lateral grooves, and a tenth steel plate is provided between adjacent sixth and seventh lateral grooves. The end of the sixth lateral groove away from the tread centerline is connected to the adjacent longitudinal groove, and the opening of the connection end between the sixth lateral groove and the adjacent longitudinal groove is provided with a first chamfer and a second chamfer with gradually changing width on both sides. The other end of the sixth lateral groove is connected to the adjacent longitudinal groove through a second steel plate. The end of the seventh lateral groove away from the tread centerline is connected to the adjacent longitudinal groove, and the opening of the connection end between the seventh lateral groove and the adjacent longitudinal groove is provided with a third chamfer and a fourth chamfer with gradually changing width on both sides.
9. The ultra-high performance tire tread pattern according to claim 2, characterized in that: The fifth tread pattern area is provided with multiple eighth transverse grooves at intervals, and an eleventh steel sheet is provided between adjacent eighth transverse grooves. The end of the eighth transverse groove near the center line of the tread is connected to the adjacent longitudinal groove, and the openings at the connection end of the eighth transverse groove and the adjacent longitudinal groove are provided with a fifth chamfer and a sixth chamfer on both sides.
10. A tire, characterized in that: Includes a tread, on which the ultra-high performance tire pattern as described in any one of claims 1-9 is provided.