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.


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    Title :

    Tread Having Hidden Cavities


    Contributors:

    Publication date :

    2019-11-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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