| 摘要 |
Winter tyre includes a tread band on which a plurality of grooves, blocks and sipes of complex shape are provided, wherein the complex shape of the sipe is defined by a first protuberance having a vertex at a first depth from the tread surface. The vertex is connected to a sipe reference plane via a first connecting surface facing toward a radially outer side of the sipe and a second connecting surface facing toward a radially inner side of the sipe, the first connecting surface being inclined with respect to the plane of reference at an angle of between about 50° and about 90°, and the second connecting surface being inclined with respect to the plane of reference at an angle of between about 0° and about 50°. |
