| 摘要 |
The tire, comprising a crown with radially reinforced side walls and beads engaging with a wheel rim, has at least one bead containing additional reinforcement made from discontinuous elements (920, 921, 922) of length L0, located in circles (C, C1, C2) concentric with the tire's axis of rotation on the wheel rim. The circles have radii (R, R1, R2) measured from the axis of rotation, and each reinforcing element on circle C with radius R is coupled mechanically for lengths of L11 and L12 respectively with two other discontinuous reinforcing elements on circle C1 with radius R1, which is smaller than radius R mand immediately adjacent to circle C. The coupled length L11 is between 55 and 75 per cent of L0, while L12 is between 10 and 30 per cent of L0. Each reinforcing element (920) on circle C is also coupled mechanically for lengths L21 and L22 to two discontinuous elements (922) on circle C2, with L21 being equivalent to 20 - 40 per cent of L0, and L22 between 4 5 and 60 per cent of L0. |
