HEAVY LOAD TIRE
To provide a heavy load tire which is improved in life performance by enhancing center wear resistance.SOLUTION: In a tire meridian cross section in a 5% inner-pressure state, curvature radii R of respective grounding-face profiles P of a center land part 3, an inside region 4a of a first middle blo...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
30.05.2023
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a heavy load tire which is improved in life performance by enhancing center wear resistance.SOLUTION: In a tire meridian cross section in a 5% inner-pressure state, curvature radii R of respective grounding-face profiles P of a center land part 3, an inside region 4a of a first middle block 4R, an outside region 4b of the first middle block 4R, and a first shoulder block 5R are stipulated. Also, a ratio (Wa/Da) of a groove depth Da and a groove width Wa of a center peripheral groove 8 is equal to or smaller than 0.25. Furthermore, a ratio (Lb/La) of a maximum length La of the first middle block 4R in a tire peripheral direction and a maximum length Lb in a tire axial direction is stipulated.SELECTED DRAWING: Figure 3
【課題】耐センター摩耗性能を高めてライフ性能を向上させた重荷重用タイヤを提供する。【解決手段】5%内圧状態におけるタイヤ子午断面において、センター陸部3、第1ミドルブロック4Rの内側領域4a、第1ミドルブロック4Rの外側領域4b、及び、第1ショルダーブロック5Rのそれぞれの接地面プロファイルPの曲率半径Rが規定される。また、センター周方向溝8の溝深さDaと溝幅Waとの比(Wa/Da)が0.25以下である。さらに、第1ミドルブロック4Rのタイヤ周方向の最大長さLaとタイヤ軸方向の最大長さLbとの比(Lb/La)が規定される。【選択図】図3 |
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Bibliography: | Application Number: JP20210188085 |