Tyre for medium/heavy transport vehicles

Tyre for wheels of vehicles comprising a carcass structure including a central crown portion and two axially opposite sidewalls terminating in a pair of beads for attachment to a rim of a wheel;

• a belt structure coaxially associated with the carcass structure;
• and a tread band (1) extended coaxially about the belt structure, the said tread band (1) being axially extended between two opposite edges (A), each delimiting in an axially external position a corresponding shoulder portion, the said tread band (1) being provided with a raised pattern comprising a plurality of circumferential ribs (2, 4, 6) delimited by a corresponding plurality of circumferential grooves (3, 5), the said tread band (1) having on its cross section a radially external reference profile (7, 8, 20) comprising a first rectilinear segment (20) local to at least one circumferential rib (2) of the said shoulder portion, which extends axially outwards beyond the said edge (A) of the said shoulder portion, characterized in that the cross section profile of the said at least one circumferential rib (2) of the said shoulder portion is composed of a second rectilinear segment (9) rotated radially lowereds about a point lying on the said first rectilinear segment (20) in a position axially not internal to the said edge (A) of the said shoulder portion.

Tyre according to any claim from 8 to 12, characterized in that the circumferential shoulder groove (3) corresponding. in an axially internal position, to the said at least one circumferential shoulder rib (2) is of asymmetrical type.