| 摘要 |
A pneumatic tyre comprises a carcass (6) comprising one ply of cords extending between bead portions (4) through the tread portion (2) and sidewall portions (3) and turned back in each said bead portion (4) from the axially inside to the axially outside of the tyre and wound around a bead core (5) so as to form a pair of wound portions (6b) and a main portion (6a) therebetween, wherein a radially outer part of the wound portion (6b), which is defined as extending axially inwards along the radially outer face (5a) of the bead core (5), has a certain length (L1) when measured along the radially outer face (5a) which is not less than 0.5 times the width (BW) of the radially outer face (5a), and an organic fibre cord layer (10) is disposed between the radially outer part (6a) and the radially outer face (5a) of the bead core, and a distance (t) between the cords (6c) of the radially outer part (9) and the radially outer face (5a) of the bead core in a normal direction to the radially outer face is in a range of from 0.05 to 1.0 times the section height (BH) of the bead core. <IMAGE> |
