Patent ID: 8820372

Claim:
A tread for a tire having an axis of rotation, the tread comprising: a plurality of grooves of depth H, each defined by two walls; a plurality of elements forming a relief and delimited by the walls of the grooves, each element comprising: a contact face that during running of the tire is in contact with the road surface, and lateral faces formed by walls of the grooves, and cutting the contact face along first edges, wherein a plurality of the elements of the tread further comprise at least one first incision of depth P, wherein each first incision: does not extend from a cavity within the element, opens onto the contact face, thereby forming second edges oriented parallel with one another and having an average orientation forming an angle at most equal to 45° with a direction of the axis of rotation of the tire opens onto two lateral faces of the element in which it is formed, thereby forming strips, each strip comprising: a length L, a width d, wherein d is less than L, a total volume Ve, and at least one cavity contained within the strip such that the cavity does not itself open onto any faces of the strip, and comprising a length Lc which is the largest dimension of the cavity, which is oriented in the direction of the length of the strip inside which it is formed, and which is between 10% and 90% of the length L of the strip, and comprising a sectional area in a sectional plane perpendicular to a transverse direction of the strip that is between 20% and 80% of the area of the section of the strip in which the cavity is formed, thereby substantially increasing contact pressures along the first and second edges.