The invention relates to a tyre comprising a crown reinforcement formed of at least two dual layers (5, 7) of reinforcing elements which are parallel within a layer, distributed at a constant pitch, and crossed from one layer to the other, which do not have any free ends at their edges. According to the invention, in a radial plane, the surface density of reinforcing elements in a region delimited by the geometric centres of four reinforcing elements (12a, 12b, 13a, 13b) which are adjacent in twos, belonging in pairs to a dual layer (5, 7) and which form a quadrilateral (11), is greater at the centre of the tyre than it is at the ends of the dual layers.