Tread (1) for a heavy-duty vehicle tire having a total thickness corresponding to the thickness of material to be worn away during running, this tread having, in the new state, a tread surface (10) intended to come into contact with a roadway when running, this tread (1) comprising at least one hidden cavity (2) intended to form a new groove opening onto the tread surface after a predetermined amount of partial wear, this hidden cavity (2) comprising two opposite lateral walls (21, 22) connected together by a bottom (23) radially towards the inside and by a crown part (24) radially towards the outside, the tread according to invention being characterized in that the crown part (24) of the hidden cavity is provided with a plurality of fine ribs (25) extending radially towards the inside of the hidden cavity (2) from the crown part (24) delimiting the hidden cavity.
BANDE DE ROULEMENT POUR PNEU DE VÉHICULE POIDS LOURD
TREAD FOR A HEAVY GOODS VEHICLE TYRE
LAUFFLÄCHE FÜR EINEN SCHWERLASTFAHRZEUGREIFEN
2020-09-02
Patent
Electronic Resource
French
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |