A pneumatic tire for vehicles which comprises a radial carcass and a breaker structure which is formed by at least two superimposed layers of cord fabric in which the cords are parallel to one another in each layer but are inclined with respect to the mid-circumferential plane of the tire in such a way that the direction of the cords in one layer crosses with the direction of the cords of the adjacent layer and an additional layer comprising a compound incorporating elongated particles of a material having a high modulus of elasticity but being resistant to compression, the longitudinal axes of the particles being oriented at an angle with respect to the mid-circumferential plane of the tire which is ranging between 60 DEG and 90 DEG .
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