| 摘要 |
Pneumatic vehicle tire of the radial type for trucks, comprise a four-ply belt (3), wherein each ply (7, 8, 9, 10) contains steel cords as reinforcing elements, and the order of plies following the sequence RRLR or RRLL, the angle (α) of the steel cords (13) of the first ply (7) being 45° to 70°, the angle (ß, γ) of the steel cords (14, 15) of the second and third ply (8, 9) being 15° to 32° respectively, and the angle (δ) of the steel cords (16) of the fourth ply (10) being 15° to 22°, the fourth ply (10) being narrower than the remaining three plies (7, 8, 9). The pneumatic tire further has a tread (6) of the tread width B, which is radially outside the belt (3). Two shoulder covering strips (11, 12) are arranged one on top of the other in the radial direction and between the second (8) and the third (9) ply, these shoulder covering strips contacting each other and being reinforced by steel cords (17, 18). The steel cords (17) of the first radially inner shoulder covering strip (11) are arranged cross-wise with respect to those of the other shoulder covering strip (12) and to the steel cords (14) of the directly radially inner adjacent ply (8). The steel cords (17) of the first, radially inner shoulder covering strip (11) form an angle &egr; with the peripheral direction, and the steel cords (18) of the second, radially outer shoulder covering strip (12) form an angle ζ with &egr;<&bgr; and ζ<γ. |
