The invention relates to a tread for a tyre of a heavy vehicle, having a wear material thickness PMU, and comprising at least two main grooves (3, 4) having a depth (P1) similar to, or equal to, the PMU, said main grooves (3, 4) defining a raised element (2); at least one secondary groove (5) having a depth P2 that is shallower than the depth P1 of the main grooves (3, 4), said secondary groove (5) extending in the raised element (2) and having a groove bottom (50), and each main and secondary groove being oriented in a main circumferential or near-circumferential direction corresponding to the mean direction of a flow of liquid in each groove; a plurality of incisions (6) formed in the raised element (2), each of said incisions comprising side parts (61, 62) formed either side of the secondary groove (5), said side parts (61, 62) being interconnected by a connecting part (63), and said connecting part (63) being formed radially towards the inside of the tread from the bottom (50) of the secondary groove (5). Said tread is characterised in that the connecting part (63) comprises an incision portion (630) oriented in the main direction of the secondary groove (5), i.e. forming a maximum angle of 30 DEG with the circumferential direction.
Evolving tread
2015-07-01
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |