The invention relates to a tyre of the heavy-duty vehicle type which is intended to be mounted on a 15° drop centre-type hollow rim. According to the invention, the two working crown layers (41, 42) are only present to form the crown reinforcement (4) over at least 40% of the width (L5) of the tread (5), the absolute value of the difference between the absolute values of the angles α2 and α1 being greater than 4°, α2 being greater than α1 in terms of absolute value, the mean angle α satisfying the relationship 20+164* exp(-L/100) < α < 23+164 exp(-L/100), and the reinforcing elements of the carcass reinforcement (2) being non-wrapped cords that exhibit, in the test known as the permeability test, a flow rate less than 20 cm3/min, a rubber compound being present within the cords.


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    Title :

    ARMATURE DE SOMMET DE PNEUMATIQUE CONSTITUEE DE DEUX COUCHES DE SOMMET DE TRAVAIL


    Additional title:

    TYRE CROWN REINFORCEMENT MADE UP OF TWO WORKING CROWN LAYERS
    REIFENKRONENVERSTÄRKUNG AUS ZWEI ARBEITSKRONENSCHICHTEN


    Contributors:

    Publication date :

    2023-05-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    French


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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