Patent ID: 9713942
Date: 2017-07-25
CPC Classifications: B60C

Claim:
1. A tire with a radial carcass reinforcement, comprising: a crown reinforcement, itself capped radially by a tread radially capping the crown reinforcement and connected to two beads by two sidewalls, the tread comprising at least two layers of blended elastomeric compounds that are radially superposed and have a voids ratio that is lower in a central part than at axially outer parts, wherein a first layer of blended elastomeric compounds of the tread is made up of a first blended elastomeric compound forming a part extending at least into the region of the equatorial plane and of at least two axially outer parts formed of a second blended elastomeric compound, wherein the first blended elastomeric compound has a macro dispersion Z-value higher than 65 and a maximum tan(δ) value, denoted tan(δ)max, lower than 0.150 at 100° C., and wherein the second blended elastomeric compound has a maximum tan(δ) value, denoted tan(δ)max, lower than 0.130 at 100° C.