| 摘要 |
A self-supporting runflat tire comprises; a carcass consisting of a single ply of organic fiber cords extending between bead portions and turned up around a bead core in each of the bead portions from the inside to the outside of the tire to form a pair of carcass ply turnup portions and a carcass ply main portion therebetween; a belt disposed radially outside a crown portion of the carcass; a sidewall reinforcing rubber layer disposed inside the carcass in the said sidewall portion and having a crescent-shaped cross sectional shape; a sidewall reinforcing cord layer of aramid cords disposed in the sidewall portion along the axially outer surface of the carcass ply main portion; and the carcass ply turnup portion extending radially outwardly beyond a maximum section width point of the carcass and terminated before the axial edge of the belt. Preferably, the aramid cord has a cord structure of 800 to 2200 dtex/2 and a twist number of from 30 to 70 turn/10 cm cord length. The cord count is 35 to 65 ends/5 cm. |
