| 摘要 |
Pneumatic tire tread (10) has at least three rows of blocks (4, 4') formed by circumferential (12) and transverse (13, 13') grooves, each block having a contact face, front, rear and side faces and a predetermined length, volume and center of gravity. Pneumatic tire tread (10) has at least three rows of blocks (4, 4') formed by circumferential (12) and transverse (13, 13') grooves, each block having a contact face, front, rear and side faces and a predetermined length, volume and center of gravity. Each of the blocks in the two outer rows has a contact surface with two convex sections and a flat section, meeting at lines (21', 23') between its front and rear faces and offset towards the front face of the block. Each of the blocks in the middle row has an upper surface with adjoining concave (111) and convex (113) sections, meeting at a line (22) offset towards the rear face. The line (22) lies along the point of contact between the tread block and a virtual cylinder with its axis concentric with the axis of the tire's axis of rotation. The center of gravity of each block in the outer rows is offset to the rear of its central point, and in the middle row forward of its central point. |
