Tire tread with blocks of at least one intermediate row having incision and blind longilinear cavity

Abstract

Tire tread () comprising a plurality of blocks (), each block () comprising a leading face (), a trailing face () and a contact face (), the leading face () making a mean angle αA greater than 0 degrees, the trailing edge () making a mean angle αF greater than 0 degrees, the angle αA of the leading face () being greater than the angle αF of the trailing face, each block () comprises an incision () extending into the thickness of the block, this incision () being delimited by opposing faces provided with blocking means () for blocking the relative movements of one of the said faces with respect to the other face in at least one direction, this incision () dividing the contact face () of the block into two parts with substantially equal surface areas, this tread being characterized in that the incision () is inclined by a mean angle β, measured with respect to the perpendicular to the contact face () in the same direction as the angle αA of the leading face and in that the volume of material contained between the leading face () and the incision () is less than the volume of material contained between the trailing face () and the same incision ().