Reversible tyre, particulary for bicycles, with two treads

Tyre, particularly for bicycles, comprising a casing (1) provided with a tread (8) and walls (2, 3) terminating in corresponding beads The tyre includes a further tread (9) attached to the casing (1) opposite the first tread (8), each of the said beads (4, 5) being constructed in a symmetrical position with respect to the median plane (P) of the corresponding wall (2, 3) so that the tyre can be fitted to the rim of the bicycle wheel in a reversed position for use of the said further tread (9).