The (100) comprising: - a carcass structure comprising at least one carcass ply (101), of a substantially toroidal shape, having opposite lateral edges associated with repective right-hand and left-hand bead structures; - a belt structure (105) applied in a radially external position with respect to said carcass structure; - a tread band applied in radially external postion with respect to said belt structure; - two sidewalls, each sidewall being applied laterally on opposite sides with respect to said carcass structure; said belt structure comprising: - at least one pair of lateral reinforcing layers (105e) substantially simmetrically arranged with respect to the eguatorical plane of said tire and applied in correspondence of the axially external portions of said tire belt structure, said lateral reinforcing layers being provided with reinforcing elements oriented in a substantially circumferential direction; a first belt layer (105a) applied in a radially external position with respect to said at least one pair of lateral reinforcing layers (105e), said first belt layer (105a) being provided with reinforcing elements parallel to one another and inclined with respect to the equatorial plane of said tire.
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