Solid golf ball

A solid golf ball comprising a solid core and a cover that encloses the solid core, the solid core having a multilayer construction which includes a center core and an outer core of at least one layer that encloses the center core, wherein

• the center core is formed primarily of a resin and has a diameter from 3 mm to less than 15 mm,
• at least one layer of the outer core is formed of a rubber composition based on polybutadiene, and
• the center core has a Shore D hardness at its surface which is higher than the Shore D hardness of an innermost layer of the outer core and has a specific gravity of 1.1 to 1.4,
• wherein said solid core has a rebound of at least 90 cm when dropped under gravity from a height of 120 cm, and
• wherein said center core has a natural frequency of at least 1,000 Hz.

A solid golf ball comprising a solid core and a cover that encloses the solid core, the solid core having a multilayer construction which includes a center core and an outer core of at least one layer that encloses the center core, wherein

• the center core is formed primarily of a resin and has a diameter of 3 mm to less than 15 mm,
• at least one layer of the outer core is formed of a rubber composition based on polybutadiene, and
• the center core has a Shore D hardness of 40 to 95 at its surface which is higher than the Shore D hardness of an innermost layer of the outer core,
• wherein said solid core has a rebound of at least 90 cm when dropped under gravity from a height of 120 cm, and
• wherein said center core has a natural frequency of at least 1,000 Hz.

A solid golf ball comprising a solid core and a cover that encloses the solid core, the solid core having a multilayer construction which includes a center core and an outer core of at least one layer that encloses the center core, wherein

• the center core is formed primarily of a resin and has a diameter of 3 mm to less than 15 mm,
• at least one layer of the outer core is formed of a rubber composition based on polybutadiene, and
• the center core has a Shore D hardness of 40 to 95 at its surface which is higher than the Shore D hardness of an innermost layer of the outer core,
• wherein the cover has a Shore D hardness of 40 to 75,
• wherein said solid core has a rebound of at least 90 cm when dropped under gravity from a height of 120 cm, and
• wherein said center core has a natural frequency of at least 1,000 Hz.

A solid golf ball comprising a solid core and a cover that encloses the solid core, the solid core having a multilayer construction which includes a center core and an outer core of at least one layer that encloses the center core, wherein

• the center core is formed primarily of a resin and has a diameter of 3 mm to less than 15 mm,
• at least one layer of the outer core is formed of a rubber composition based on polybutadiene;
• and
• the center core has a Shore D hardness of 40 to 95 at its surface which is higher than the Shore D hardness of an innermost layer of the outer core,
• wherein the cover has a specific gravity of 0.95 to 1.25,
• wherein said solid core has a rebound of at least 90 cm when dropped under gravity from a height of 120 cm, and
• wherein said center core has a natural frequency of at least 1,000 Hz.