TREAD, THE ROLLING NOISE OF WHICH IS REDUCED

摘要

The invention relates to tire for a heavy vehicle, having a tread (1) including a plurality of circumferential grooves (43, 35) defining intermediate ribs (3) and two edge ribs (4, 5), each rib having a minimum width Ln, each circumferential groove including projections (46, 36) that are formed so as to project over at least a side wall delimiting said groove; a half-closed notch (37, 57) is provided opposite each projection, said notch having an axial length La equal to at most 60% of the minimum width Ln of said rib, and a width Le equal to at most the width Lr of the groove, wherein said notch is oriented so as to form, with the main direction of the projection with which said notch engages, a mean angle B equal to at least 10 degrees; each projection (46, 36) closes 30 to 75% of the surface of the section of the groove in which it is formed; and a functional clearance (J1, J2) is provided between the projection and the walls defining the half-closed notch.