| 摘要 |
A safety device and a tubeless tire construction comprising a tubeless tire having beads the thickness of which is equal to e and an integral height H and a safety ring supported by a rim having a width equal to L. The dimensional relationships between the safety device and the tubeless tire are calculated so that: the width L' at the top of the safety ring is such that: L-3e</=L'</=L-e, and the height H' of the safety device is such that: <IMAGE> the rigidity R of the safety ring is such that: 750 Kg/cm</=R</=1050 Kg/cm, and the weight of the safety ring, expressed as a percentage of the weight of the tire, and its SHORE A hardness correspond so that, when the latter is between 70 and 80, the weight is between 60% and 70% of the weight of the tire.
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