| 摘要 |
SHOULDER REINFORCEMENT FOR RADIAL PLY TIRE A radial ply pneumatic tire (1) has carcass plies (16, 17), folded axially around a pair of axially spaced apart bead cores (2). The crown reinforcement (5) has one belt ply (7) folded around at least two unfolded plies (8, 9) and a shoulder reinforcing structure (11) comprising a least three layers reinforced by textile cords, forming with an axial plane intersecting them, angles which are opposed. The layers have substantially the same width. In a preferred embodiment, the lateral extent (G) of the layers under the folded belt ply (7) ranges between B/4 and B/3, wherein B is half the lateral width of the folded ply and the lateral extent ( L) into the sidewall, beyond the edge of the folded ply, ranges between G and 2G. |
