| 摘要 |
Tyre (10) comprising a tread portion designed to be worn off during the life of the tyre having a radial thickness T, an outer edge (45) and an inner edge (46), the axial distance between the outer edge (45) and the inner edge (46) defining the axial width L of the tread, the tread comprising four adjacent portions (411-414) made of a four rubber compounds, wherein the rubber compounds making up the first and third portions are predominantly filled with carbon black filler, wherein the rubber compounds making up the second and fourth portion are predominantly filled with non carbon black filler, wherein the rubber compounds making up the first and third portions have a value for tan´ at 0°C, at a stress of 0.7 MPa, that is lower than that of the rubber compounds making up the second and fourth portion, and wherein the axial width of the first portion decreases and the axial width of the second portion increases as a function of the distance from the rolling surface of the tread when unworn. |
