| 摘要 |
PURPOSE:To relax stress concentration in a cushion rubber layer in an effective manner, by making up cushion grooves on both sidepieces of a tread rubber layer in the circumferential direction of a tire. CONSTITUTION:A recapped tire 1 is formed by sticking a pre-vulcanized tread rubber layer 2 to a case body 4 into an unit body while interposing a cushion rubber layer 3 in between, and cushion grooves 8 where an upper lip 6 and a lower lip 7 are closed up in time of tire grounding are made up on both sidepieces of the tread rubber layer 2 in the circumferential direction. As the cushion grooves 8 are provided on both the sidepieces 5, the stress to be transmitted from the direction of tread grounding is relaxed by dispersion along the grooves so that stress concentration on both ends 3a of the cushion rubber layer 3 can be obviated effectively. |
