| 摘要 |
<p>A pneumatic radial ply runflat tire (1000) for a vehicle has a tread (1012), a carcass (1022) comprising at least one radial ply (1030) and two sidewalls (1016) each reinforced by a circumferentially disposed crescent-shaped wedge insert. Each insert has an elastomeric porous section (1042) embedded in an elastomeric stiffer layer (1044) of the insert (1040). When the tire is normally inflated, the porous section (1042), and hence the insert as a whole, is flexible, thereby providing comfortable driving characteristics. Under runflat (deflated tire) conditions, the pores in the porous section (1042) collapse, and the porous section (1042) stiffens, and hence the insert as a whole becomes stiff enough to support the load of the vehicle. <IMAGE></p> |
