| 摘要 |
A golf ball (1) comprises a large number of dimples (4) and a land portion (5) on a surface thereof. The dimple (4) is concaved from the surface of a phantom sphere shown in a two-dotted chain line. The dimple (4) includes an edge (E). The dimple (4) includes an outer region (6) on an outside of the edge (E). A mean value of a width (W) of the outer region (6) is 0.03 mm to 0.20 mm. A mean value of a ratio (W/d) of the width (W) of the outer region (6) to a maximum dimension (d) of the dimple (4) is 0.015 to 0.040. A mean value of an angle (a) formed by the outer region (6) and a maximum dimension line (T) is 1.0 degree to 15.0 degrees. The separation of air flowing into the dimple (4) can be suppressed by the outer region (6).
|
