Abstract: A collapsible tire for a passenger vehicle, comprising at least one carcass reinforcement optionally associated with an inextensible crown reinforcement, itself radially on the inside of a tread, two beads and two sidewalls, said beads comprising at least one inextensible circumferential reinforcing element called a bead wire, said bead wire defining, when free of any stress, a mean line forming a substantially circular closed curve in a circumferential plane, wherein the invention is characterized in that the bead wire of each bead is flexible, wherein after the tire has been collapsed, the mean line of the bead wire simultaneously defines a first curvature, and a second curvature, the first and second curvatures being connected together by a third connecting curvature, the projection of said first, second and third curvatures of the collapsed tire onto an axial plane defining the two-dimensional envelope by way of a total perimeter P of less than or equal to [3×(2H+A)], H being the height of the sidewall an

Abstract: A tire pressure observation method and computer readable medium is provided. Upon detection of an abnormal pressure condition, a tire pressure observation method provides for various maintenance actions. A computer readable medium may contain instructions for a tire pressure observation controller directing the controller to present messages at different stages of the maintenance actions to assist maintenance staff in properly performing the maintenance actions, for example, observing the tire pressure.

Abstract: The invention relates to a collapsible tyre for a vehicle, comprising at least one carcass reinforcement (5) surmounted radially from the outside by an inextensible crown reinforcement (4), itself radially on the inside of a tread (2), the said reinforcements (4, 5) each consisting of at least one layer of reinforcing elements, the said tread (2) being connected to two beads (6) by two sidewalls (8), the said beads (6) being intended to come into contact with a rim, each bead (6) comprising at least one circumferential reinforcing element (3) called a bead wire, the said bead wire (3) defining a mean line forming a substantially circular closed curve in a circumferential plane. The bead wire (3) of each bead (6) is flexible and comprises at least one concave part Pc of smaller radius Rc and of centre of curvature Cc. The invention also relates to a method of collapsing the tyre and to a use of the tyre.

Abstract: The invention is a collapsible tire assembly for a vehicle designed for traveling over terrain. In detail, the tire assembly includes a rim rotatably mountable to the vehicle. An outer tube expandable from a stored condition to an expanded condition is attached to the rim. The outer tube includes side portions and a center tread portion for making contact with the terrain when in the expanded condition. A mechanism is included for mounting the side portions of the outer tube to the rim such that the outer tube forms a chamber. An inner tube is mounted within the chamber expandable from a stored condition within the chamber to an expanded condition expanding the outer tube to the expanded condition such that the center tread portion is supported by the inflated inner tube and the tire assembly is suitable for moving the vehicle over the terrain.