A golf ball has a large number of dimples on a surface thereof. The golf ball meets the following mathematical formula (I): 1.320L11.420 (I), where L1 represents a ratio of a lift coefficient CL1 which is measured under conditions of a Reynolds number of 1.29010.sup.5 and a spin rate of 2820 rpm, relative to a lift coefficient CL2 which is measured under conditions of a Reynolds number of 1.29010.sup.5 and a spin rate of 1740 rpm.

A golf ball includes oval dimples arranged on the surface thereof. Each of the oval dimples has a long diameter DL and a short diameter DS in a planar shape thereof and further having a depth DPL on a first cross section of the oval dimple along the long diameter DL and a depth DPS on a second cross section of the oval dimple along the short diameter DS, the depth DPL being a distance taken on the first cross section along the long diameter DL from a first line connecting both ends of the first cross section of the oval dimple to a deepest point of a dimple bottom surface, the depth DPS being a distance taken on the second cross section along the short diameter DS from a second line connecting both ends of the second cross section of the oval dimple to a deepest point of a dimple bottom surface, a relationship between the depth DPL and the depth DPS being defined as a following formula (1):

DPS>DPL(1).

Each of the oval dimples further having a cross-sectional area DLA on the first cross section of the oval dimple along the long diameter DL and a cross-sectional area DSA on the second cross section of the oval dimple along the short diameter DS, the cross-sectional area DLA being surrounded by the first line connecting both ends of the first cross section of the oval dimple and the bottom surface thereof, the cross-sectional area DSA being surrounded by the second line connecting both ends of the second cross section of the oval dimple and the bottom surface thereof, a relationship between the cross-sectional area DLA and the cross-sectional area DSA being defined as a following formula (2):

DLADSA(2).

An object of the present disclosure is to provide a golf ball that has a small difference between a flight distance on driver shots by a golfer with a fast head speed and a flight distance on driver shots by a golfer with a slow head speed, and can reduce flight distance handicap. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer, and an outermost cover having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a base rubber, a co-crosslinking agent, and a crosslinking initiator, the base rubber contains a natural rubber, a total lower volume of the plurality of dimples is 365 mm.sup.3 or more, and an occupation ratio of a total area of the plurality of dimples in a surface area of a phantom sphere that is assumed to have no dimples on the outermost cover is 75% or more.

The present invention provides a golf ball in which dimples are formed on a ball surface, wherein when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted as ED1, ED2, and ED3, respectively, dimples with a cross-sectional shape satisfying the following condition (1):

[00001]$\begin{array}{cc}\mathrm{ED}1<\mathrm{ED}2>\mathrm{ED}3& \left(1\right)\end{array}$

account for at least 10% of a total number of the dimples, and further a ratio A1 of a lift coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm to a drag coefficient, a ratio A2 of a lift coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm to a drag coefficient, and a ratio A3 of a lift coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm to a drag coefficient are optimized.

An object of the present disclosure is to provide a golf ball that bends in a great amplitude on short iron shots and rolls in a short distance after landing. The present disclosure provides a golf ball comprising a spherical core, one or more intermediate layer positioned outside the spherical core, and an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a rubber component, a co-crosslinking agent, and a crosslinking initiator, the rubber component contains a natural rubber, the co-crosslinking agent contains methacrylic acid and/or a metal salt thereof, a total lower volume Vi (mm.sup.3) of the plurality of dimples is less than 365 mm.sup.3, and an occupation ratio of the dimples is 75% or more.

An object of the present disclosure is to provide a golf ball that rolls a short distance on fairway wood shots and has excellent controllability of a flight distance. The present disclosure provides a golf ball comprising a spherical core, at least one intermediate layer positioned outside the spherical core, and an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a rubber component, a co-crosslinking agent, and a crosslinking initiator, the rubber component contains a natural rubber, a total lower volume Vi (mm.sup.3) of the plurality of dimples is less than 365 mm.sup.3, and an occupation ratio of the dimples is 75% or more.

A golf ball includes a core and a cover, in which a large number of dimples are formed on an outside surface of the cover, the cover is formed using an ionomer resin as a chief material, an initial velocity of the ball is set within a predetermined range, a deflection when a predetermined load is applied to the ball is set within a predetermined range, a relationship of a ratio to a lift coefficient/drag coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm, a lift coefficient/drag coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm, and a lift coefficient/drag coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm is specified, and a volume occupancy ratio of the dimples is set within a predetermined range.

Provided is a golf ball including a core, an intermediate layer, and a cover. A relationship between surface hardnesses of an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression. With a ball initial velocity and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of coreweight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphereinitial velocity of core)(weight of intermediate layer-encased sphereweight of core)] be Miw, and a value of [(initial velocity of ballinitial velocity of intermediate layer-encased sphere)(weight of ballweight of intermediate layer-encased sphere)] be CViw, the following condition is satisfied:

[00001]$2500\mathrm{Ciw}+\mathrm{Miw}+\mathrm{CViw}2650,$

wherein a total volume of the dimples is from 306 to 363 mm.sup.3.

In a golf ball including a core, an intermediate layer, and a cover, the relationship of the surface hardness between an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression, and with an initial velocity of the ball and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of coreweight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphereinitial velocity of core)(weight of intermediate layer-encased sphereweight of core)] be Miw, and a value of [(initial velocity of ballinitial velocity of intermediate layer-encased sphere)(weight of ballweight of intermediate layer-encased sphere)] be CViw, the expression of Ciw+Miw+CViw is optimized, and a volume occupancy ratio VR of the dimples is set within a predetermined range.

An object of the present disclosure is to provide a golf ball that rolls in a lowered distance on fairway wood shots. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer covering the spherical core, and an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a base rubber, a co-crosslinking agent, and a crosslinking initiator, the base rubber contains a natural rubber, and an occupation ratio of a total area of the plurality of dimples in a surface area of a virtual sphere that is assumed to have no dimples on the outermost cover is 45% or more and less than 75%.