| 摘要 |
PROBLEM TO BE SOLVED: To improve operational stability and at the same time reduce tire pattern noise by specifying the range of the ratio of the rate of change of the length of a tire flat portion, which is represented by the ratio of the shortest length to the longest length of the flat portion in the circumferential direction, to the rate of change of a translot width, which is represented by the ratio of the shortest width to the longest width of the translot of the tire in the circumferential direction. SOLUTION: Among blocks 11A to 11E of a flat portion L1, it is preferable to define the ratio of the tire circumferential length or the shortest block 11E tire circumferential length Bss to the tire circumferential length B11 of the longest flat portion 11A as a flat portion length rate of change BR and set the flat portion rate of change to approximately 1.1 to 1.5. Regarding a translot 10A, the ratio of the tire circumferential width Gss, which has the narrowest tire circumferential width, to the widest tire circumferential width G11 of the longest translot is defined as a translot width rate of change GR. The ratio of the fiat portion length rate of change BR to the translot width rate of change GR (GR/BR) is regulated within the range of 1.2 to 1.5. |
