Tire for heavy vehicles

A tire having a radial carcass reinforcement intended to be fitted on vehicles bearing heavy loads, the tire comprising:

• a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one layer to an adjacent layer at circumferential direction angles of between 10° and 45°;
• a tread radially topping said crown reinforcement, said tread being joined to two beads by means of two sidewalls;
• wherein a ratio of a thickness of a crown block at one shoulder end to a thickness of the crown block in a circumferential median plane is greater than 1.00 and less than 1.20;
• wherein a ratio of an axial width of said tread to a maximum axial width of the tire is greater than 0.89;
• wherein a ratio of a height H of the tire on its rim to a maximum axial width S of the tire is less than 0.60;
• wherein said thickness of a crown block at one shoulder end is defined by a length of an orthogonal projection of said one shoulder end on a radially innermost layer of rubber mix of the tire from said one shoulder end on an outer surface of the tire to said radially innermost layer of rubber mix;
• and
• wherein said one shoulder end is defined, in a zone of a shoulder of the tire, by the orthogonal projection orthogonal to an outer surface of the tire of an intersection of a first tangent to a surface of an axially outer end of the tread and a second tangent to a surface of a radially outer end of a sidewall.