| 摘要 |
<p>PURPOSE:To make bead part endurance performance effective sufficiently even under severe conditions where repeated compressive deformation is received by specifying steel cord distance between a carcass body and a return part, and specifying the respective heights of the carcass body and the return edge. CONSTITUTION:A return part 3 is disposed unevenly with regard to a carcass body 2 so that steel cord distance between the carcass body 2 and the return part 3 may gradually reduce from an area adjacent to a bead core 1, where the cord distance is a maximum value, toward the outside in a tire diametrical direction to become a minimum value once, and gradually increases to become a maximum value once, and then gradually reduces to become the smallest value at the return edge. Besides, the start point of the minimum value and the maximum value, and the return edge, that is, the start point of the smallest value are positioned so that the height measured from a rim base line R may be within A, B, or H of respective expressions I with regard to the flange height FH of a normal rim.</p> |
