Abstract: The invention provides for a heavy truck tire tread (2) having a longitudinal direction (X), a lateral direction (Y) and a thickness direction (Z), said tread comprising: longitudinal grooves (20) separating longitudinal ribs; a pair of opposing tread edges (21, 21?) spaced apart along the lateral direction; a pair of shoulder ribs (22, 22?), each shoulder rib being adjacent to a respective tread edge of said pair of tread edges; wherein the shoulder ribs are solid ribs comprising lateral full depth sipes (23, 23?) running at a sipe angle (?) relative to the lateral direction (Y) and; wherein an average sipe angle (?A) over a center portion of said shoulder ribs is greater than 30° in absolute value.