A tire with improved performance in terms of grip on wet ground even when it is close to the legal wear limit. The tread comprises three layers of materials (M1, M2, M3), radially superposed: the layer (M1) is laid radially on the outside of the crown reinforcement. The layer (M2) is laid radially on the outside of the layer (M1), and the last layer (M3) intended to be in contact with the ground is laid radially on the outside of the layer (M2). The moduli of shear stiffness, G′M1), G′(M2), G′(M3), and the viscoelastic losses Tgδ(M1), Tgδ(M2), Tgδ (M3) of the materials of the layers satisfy the following relationships:G′(M1)/G′(M2) is within the range [7; 25];Tgδ (M2) and Tgδ (M3) are linked by the following relationship: (Tgδ (M2)−Tgδ (M3))/Tgδ (M2)≥30%Thickness of layer (M3)/Thickness of layer (M2) is within the range [3; 10].
Tire Comprising a Tread Optimized for Grip on Wet Grounds in the Worn Condition
2023-09-07
Patent
Elektronische Ressource
Englisch
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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