Tire Tread for a Heavy Vehicle with Improve Resistance to Aggressive Effects

A tire tread () for a heavy-duty vehicle to improve resistance to attack by stones. The tread () in the new state having at least one complex cut () with, along a mean line (Lm), an alternation of external cavities (), opening onto the tread surface (), and internal cavities (), not opening onto the tread surface (), two consecutive cavities, respectively an external cavity () and an internal cavity (), being connected to each other by a connecting channel () of non-zero length, the height (H) of each external cavity () being at least equal to half the height (H) of the complex cut (), the height (H) of each connecting channel () being at most equal to one third of the height (H) of the complex cut ().