摘要 |
The invention relates to a tyre including a radial carcass ply. The tyre comprises a crown ply capped radially with a tread connected to two beads by means of two sidewalls, said tread comprising at least two radially-stacked layers of elastomer blends and having a lower grooving rate in the centre than at the axially outer portions thereof. A first elastomer-blend layer of the tread is formed by a first elastomer blend forming a portion that extends at least in the area of the mid-plane and by at least two axially outer portions formed by a second elastomer blend, in which the first elastomer blend has a macro dispersion score Z above 65 and a maximum tan(δ) value, denoted tan(δ)max, below 0.150, and the elongation at break, according to a tearability measurement, at 100°C of the second elastomer blend has a value at least 10 % greater than the elongation at break value, according to a tearability measurement, at 100°C of the first elastomer blend. |