Tire having a reinforced lower zone

A tire for a motor vehicle comprising:

• two beads intended to come into contact with a mounting rim, each bead comprising at least one annular reinforcing structure, each annular reinforcing structure having a radially innermost point;
• two sidewalls extending the beads radially outward, the two sidewalls meeting at a crown comprising a crown reinforcement having at least one ply provided with crown reinforcing elements, the crown reinforcement being furthermore surmounted by a tread;
• at least one carcass reinforcement extending from the beads through the sidewalls as far as the crown, the carcass reinforcement having a plurality of carcass reinforcing elements and being anchored in the two beads by a turn-up around the at least one annular reinforcing structure, so as to form in each bead a main strand and a turn-up strand;
• and
• a stiffening reinforcement arranged in at least one sidewall, the stiffening reinforcement having a radially inner end and a radially outer end, the stiffening reinforcement being formed of a plurality of stiffening elements oriented at an angle less than or equal to 10° relative to a circumferential direction of the tire,
• wherein each turn-up strand of the carcass reinforcement extends radially outward as far as an end situated at a radial distance DRE from the radially innermost point of the at least one annular reinforcing structure of the bead, the radial distance DRE being greater than 20% and less than or equal to 95% of a radial height H of the tire,
• wherein the carcass reinforcement comprises crossed reinforcing elements oriented at an angle of between 70° and 80° relative to the circumferential direction and non-crossed reinforcing elements oriented at an angle of approximately 90° relative to the circumferential direction, the crossed reinforcing elements of the carcass reinforcement being radially inside the radially outer end of the stiffening reinforcement,
• wherein the crossed reinforcing elements of the carcass reinforcement are arranged so as to form a portion of the main strand that is adjacent to the turn-up strand or both the turn-up strand and a portion of the main strand that is adjacent to the turn-up strand,
• wherein when the crossed reinforcing elements form a portion of the main strand and the turn-up strand, the crossed reinforcing elements of the turn-up strand are oriented at the same angle with respect to the circumferential direction from the radially inner end of the turn-up strand to the radially outer end of the turn-up strand,
• wherein when the crossed reinforcing elements form a portion of the main strand and the turn-up strand, the crossed reinforcing elements of the main strand are oriented at angles that are opposite to angles of crossed reinforcing elements of the turn-up strand relative to the circumferential direction, and
• wherein the stiffening reinforcement is arranged such that a radial distance DRR between the radially inner end and the radially outer end is at least equal to 10% of the radial distance DRE from the turn-up strand of a corresponding sidewall.