Patent ID: 7380577

Claim:
A tread of rubber mix for a tire, the tread comprising: a tread pattern formed by a plurality of elements in relief, each element in relief comprising a first contact surface for contacting a road during travel, and two lateral faces, and an inserted element arranged in a groove formed by two neighboring elements in relief and comprising two lateral faces facing the respective lateral faces of the neighboring elements in relief, and a second contact face, wherein said second contact face is offset radially towards the inside of the tread relative to the first contact faces of the neighboring elements in relief so as to be able to be in contact with the roadway during travel, wherein the inserted element is connected to the neighboring elements in relief by a plurality of connecting bridges of rubber mix which have an average length L, wherein the connecting bridges between the inserted element and each neighboring element in relief define a plurality of wells having an average length D, the average length L of the connecting bridges being between one and six times the average length D, the length D and the average length L being measured in a direction parallel to a trace on the rolling surface of the lateral faces of the inserted element, and wherein each connecting bridge comprises only one outer surface which connects to and constitutes a continuation of the second contact surface of the inserted element.