Rolling assembly for a tire having beads with frustoconical bases which assembly includes a mounting rim with flat seats and annular adapters

A rolling assembly for a tire (P) having beads (3) with frustoconical bases, the tire being of standard dimensions without independent inner tube, intended to be used on a standard rim having frustoconical seats and rim flanges of a height H, comprising

• a service rim (J) formed primarily of two rim flanges of height H and a cylindrical rim face the diameter .phi..sub.JS of which is such that ##EQU3## .phi..sub.SE being the nominal diameter of the standard rim normally used for the tire (P), and K being the axial distance between the vertex of the rim flange and the end of the cylindrical rim base, while the width (W) of the rim (J) is between 1.05 and 1.10 times the width of the standard rim, and
• annular adapters (S.sub.1, S.sub.2) for insertion between the beads of the tire and the rim, each adapter (S.sub.1, S.sub.2) having an outer contour (4', 5', 6', 7', 8', 9') adapted to the contour (7, 8, 9) of the rim (J) on which it rests and to the contour (4, 5) on the base of the bead (3) of the tire (P) and being formed of a vulcanized elastomeric material (C) of an elastic modulus in compression at least equal to 8 MPa, which material is surrounded by a reinforcement (N.sub.90) formed of at least one ply of meridian cords or cables and reinforced by a mass (N.sub.o) of nonextendable cords or cables which are arranged circumferentially, this mass (N.sub.o), which is in the form of superimposed strips or "package" rings being located between the two quasi-vertical faces (56' and 89') of the adapter(S.sub.1, S.sub.2).