| 摘要 |
The invention concerns a mount rim (J) designed to form a running assembly with a tyre and an inflatable and inflated tread bearing support (3), and comprising on either side of an equatorial plane of the rim seat (10', 10'') sloping outwards and axially extended outwards by a projection or hump (11', 1''). The invention is characterised in that it comprises, axially inwards between each rim seat (10', 10'') for the tyre bead (20', 20'') and the equatorial plane (XX') at least a truncated seat (12', 12'') sloping outwards and designed to receive a bead (30', 30'') providing pneumatic bearing support (3) for the running tread. The running assembly is used either with a bearing support (3) in the form of a highly inflated doughnut-shaped membrane and preserving its shape and pressure in case the tyre is punctured, or with a bearing support (3) in the form of an expansible membrane in case the tyre is punctured completely filling the tyre cavity.
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