| 摘要 |
<p>The invention concerns a tyre having at least a bead seat inclined outwards and a radial carcass reinforcement (1) wound in said bead around a bead core (2) starting from the rim to the tip of the bead B to form a turn-up (10) whereof the edge, viewed in meridian cross-section, is located on the radially outer surface (31) of an extruded profile (3) of rubber mixture, axially and externally adjacent to the bead core (2), and having, viewed in meridian cross-section, a water drop shape with an apex A located beneath the bead core (2) section, and a Shore A hardness greater than the Shore A hardness value(s) of the rubber mixtures (6, 7) located axially and radially above the bead core-extruded profile assembly. The invention is characterised in that the carcass reinforcement turn-up (10) is extended by a reinforcing frame (11) enclosing said profiled section (3), the turn-up (10) of the carcass reinforcement (1) and said reinforcing frame (11) overlapping over an axial distance 1 not less than the axial half-width of the bead seat (420), and the radial distance between the reinforcing elements respectively of the two reinforcements (10) and (11) being not less than 0.6 mm.</p> |
