| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire that reduces air column resonance sound of a main groove without impairing drainage performance.SOLUTION: A tire 2 comprises: a tread 4; a pair of side walls 6; a pair of beads 10; a carcass 12; a belt 14; and a reinforcing rubber member 20 positioned outside in a radial direction of the belt 14. On a surface 22 of the tread, a main groove 24 that extends in a circumferential direction is formed. The main groove 24 comprises a bottom surface 24a facing outward in a radial direction. The reinforcing rubber member 20 is positioned inside in the radial direction of the bottom surface 24a of the main groove 24 and extended in the circumferential direction. A width Wc of an outer end in the radial direction of the reinforcing rubber member 20 is set to be smaller than a width Wb of the bottom surface in an axial direction of the main groove 24. A width in the axial direction of the reinforcing rubber member 20 is set to be larger from a width Wd of an inner end in the radial direction toward the width Wc of the outer end in the radial direction. A complex elastic modulus Eof the reinforcing rubber member is set to be larger than a complex elastic modulus Eof the tread. |
