| 摘要 |
PURPOSE:To heighten cornering power and obtain excellent steering performance by forming shoulder ribs at both end parts of a tire tread and providing a narrow width end part and a joint as well as narrow width slots at the shoulder end. CONSTITUTION:A narrow width end part 8 which is 2mm lower than a shoulder rib 5 is provided at the shoulder end part 7 of a shoulder rib 5 formed by the tread groove 4 of a tire, and the rib 5 and the narrow width end part 8 are connected by a steeply inclined joint 9. Slots 10 of 0.4-2.0mm in width crossing the joint 9 are numerously disposed in the peripheral direction. The slot 10 in the form of 'Z' or 'S' is formed of wing parts 11, 12 and an inclined part 13 connecting the wing parts 11, 12 at the angle of 20-60 deg.. The narrow width end part thus possesses sufficient rigidity in the axial direction so as to heighten cornering power as well as the tread is sufficiently connected between the narrow width end part 8 and the shoulder rib 5 so as to improve steering performance largely. |
