| 摘要 |
A pneumatic tire comprises a tread reinforcing belt, and the belt includes a band composed of at least one helically wound rayon cord, wherein the rayon cord is composed of (1) a single bunch of filaments final-twisted together, or (2) 2 or 3 bunches of nontwisted filaments which bunches are final-twisted together, or (3) 2 to 3 strands final-twisted together wherein each of the strands is a bunch of filaments primarily-twisted together, and the final-twist number (turn/10 cm) and a total decitex value D (dtex) of the rayon cord satisfy the following conditions: 1840=<D=<5520; and 1.0=<NxD̂0.5x10̂-3=<5.3x10̂-4xD+0.41. |
