Method for forming a tyre for vehicle wheels tyre obtained by said method, said tyre comprising a carcass structure, an annular reinforcing structure associated with said carcass structure, a tread band in a position radially outside said carcass structure, and a pair of sidewalls in axially opposite on said carcass structure, where the manufacture of said crcass structure comprises at least the steps of: preparing of strip-like elements each comprising one or more elongated elements at least partially lined with at least one layer of elastomeric material, laying each strip-like element on a a toroidal support in a subetantially U-shaped configuration around the profile of the cross-section of said toroidal support in order to define two lateral positions which extends substantially in planes perpendicular to the geometrical axis of rotation of said toroidal support in positions spaced from each other in the axial direction, and a crown portion which extends in a radially external position between said lateral portions, said crown portions of each strip-like element being arranged side-by-side with respect to each other along the circumferential extension of the toroidal support, said method envisaging a step involving constriction of the end zones of each strip-like element, prior to laying thereof on said toroidal support.