| 摘要 |
A golf ball with an enhanced Moment of Inertia is constituted by a core, a mantle or inner cover layer and an outer cover layer wherein the core is made smaller and lighter than is normal and the mantle is made heavier than is normal. Typical golf balls according to the invention comprise a core having a diameter of not more than 40 mm and a weight of not more than 44.5 g; an inner cover layer and an outer cover layer each having a thickness greater than .25 mm ; the weight of the core plus inner layer is more than 32.2 g ; and the whole ball weighs more than 45 g. A typical minimum value of Moment of Inertia is 0.390. The desired weight distribution is attained by incorporating a heavy filler.
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