| 摘要 |
PROBLEM TO BE SOLVED: To provide a retread tire reduced in deterioration of durability even if the tire is repeatedly retreaded and having high durability after the tire is repeatedly retreaded. SOLUTION: A tire comprises: a carcass 2; a belt 3 and/or a cushion rubber 4; and a tread rubber 6, viewing from an inside of a tread center zone in the radial direction of the tire, in which a sulfur content in the belt rubber 3B used for the belt 3 and/or the cushion rubber 4 is 0.75 to 1.80 mass%. A retread tire comprises: a carcass 2; a belt 3 and/or a cushion rubber 4; and a retreaded rubber 7, viewing from an inside of a tread center zone in the radial direction, in which a sulfur content in a part 7' within 5 mm from the retreaded interface S of the retreaded rubber 7 is 0.75 to 1.80 mass% (1), and a sulfur concentration C (mass%) in the belt rubber 3B used for the belt 3 and/or the cushion rubber 4, and the number N of retreading are set to satisfy the relation expressed by an expression: C≤-0.015×N<SP>2</SP>+0.65×N+1.80 (2). COPYRIGHT: (C)2008,JPO&INPIT
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