| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a side wall rubber and to reduce rolling resistance without impairing durability. <P>SOLUTION: The tire 1 for heavy load has a carcass 6 having a carcass cord extending from a tread part 2 to a bead core 5 of a bead part 4 via a side wall part 3; and a belt layer 7 arranged outside in a tire radial direction of the carcass and inside of the tread part 2. The side wall part rubber 3g extending in a tire radial direction of the outer side of the carcass 6 in the side wall part 3 includes an inner rubber part 10 on a carcass side; and an outer rubber part 11 arranged on its outside and forming a tire outer surface. Further, the inner rubber part 10 has smaller loss tangent tanδ than the outer rubber part 11 and the difference is 0.010-0.035. Further, the inner rubber part 10 has smaller complex modulus of elasticity than the outer rubber part 11 and the difference is 0.5-1.4 MPa. <P>COPYRIGHT: (C)2007,JPO&INPIT |
