| 摘要 |
<p>A tyre (1), comprising - two toroidal bead portions (12), each housing an annular bead bundle (121); - a toroidal body ply (10), folded, at each of its transversal ending portions (101), about a respective bead bundle (121) forming a respective turn-up (14); - two bead fillers (20), one for each bead portion, each in contact with a respective bead bundle (121) and at least partly enclosed by a respective turn-up (14), which tyre (1) further comprises - two elastomeric crack control members (21), one for each bead portion (12), wherein each crack control member (21) extends at a body ply ending (101), externally to the respective turn-up (14), and each crack control member (21) is made by a couple of strips having a differentiated stiffness along their transversal section, with a lower stiffness at a first strip (201, 211) adjacent to the body ply ending (101) and a higher stiffness at a second strip (202, 212) in contact with the respective bundle (121), so that the first lower stiffness strip defines a preferential propagation path for any tyre crack originating at the body ply folded ending.</p> |
