Patent ID: 7201672

Claim:
A multi-piece solid golf ball comprising; a solid core and a cover consisting of inner and outer layers surrounding the core, the outer cover layer having a surface formed with a plurality of dimples, a product of the Shore D hardness of said inner cover layer multiplied by the Shore D hardness of said outer cover layer and a proportion V R (%) of the total of the volumes of dimple spaces each defined below a plane circumscribed by the dimple edge to the overall volume of a phantom sphere given on the assumption that the golf ball surface is free of dimples satisfying the following relationship: the product of Shore D hardnesses of inner and outer cover layers: 2,000 to less than 2,500 V R : 0.77 to 1.03%, and the number of said dimples being 370 to 450, and said dimples including at least three types of dimples which are different in at least one of a diameter, a depth, and a value V O which is the volume of one dimple space defined below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom, wherein the dimples of the largest type have the diameter of 3.7 to 4.5 mm, the depth of 0.15 to 0.25 mm and the V o value of 0.38 to 0.55, and their number is 5 to 80% of the total dimple number.