Abstract: Tire tread band having a tread surface having at least two wearing layers, a first wearing layer formed by raised elements each having a contact surface, having at least grooves of circumferential orientation, and intended to contact the road surface when new, and at least one wearing layer in contact with the road surface after the first layer has entirely worn away, and containing at least one channel extending in the circumferential direction, and opening onto the tread surface when the wearing layer that precedes it has completely worn away, each wearing layer distinct from the first wearing layer, having transverse incisions distributed in the circumferential direction, extending from a channel of the layer in a direction which is not circumferential, opening fully or partially into at least one other circumferentially oriented channel or groove, irrespective of the level of wear of the other wearing layer.

Abstract: Tyre tread band (1) having a tread surface (10) to come into contact with the road surface, this tread band comprising at least two wearing layers (C1, C2, C3) which are superposed in the thickness of the tread, this tread band (1) having a first wearing layer (C1) formed by a plurality of raised elements (21, 22) each comprising a contact surface, this first layer comprising at least grooves (20, 20?) of circumferential overall orientation, this first layer being intended to be in contact with the road surface when the tread is new, and at least one other wearing layer (C2, C3) coming into contact with the road surface after the first layer (C1) has entirely worn away, each other wearing layer comprising at least one channel (30) extending in the circumferential overall direction, each channel (30) opening onto the tread surface as soon as the said wearing layer is reached after the wearing layer that proceeds it has completely worn away, this tread band being such that each wearing layer (C2, C3), distinct