Abstract: A golf ball has a plurality of minute projections 20 on a surface thereof. An average value Hav of heights H of these minute projections 20 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the minute projections 20 on these first zones is higher than an average value Hav2 of the heights H of the minute projections 20 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball has a large number of exposed portions 22 on a surface thereof. An average value Hav of heights H of these exposed portions 22 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the exposed portions 22 on these first zones is higher than an average value Hav2 of the heights H of the exposed portions 22 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is formed in a mold having support pins by injection molding. A ratio (V/S) of a volume V (mm3) of the cover 6 to an amount of compressive deformation S (mm) of the core 4 is not less than 1000 and not greater than 1900. The cover 6 has a shore D hardness of not greater than 62. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A total volume W of these dimples is not less than 490 mm3 and not greater than 620 mm3. A ratio (?/P) of a latitude ? (degree) of each support pin to a total cross-sectional area P (mm2) of the support pins is not less than 0.35 and not greater than 0.60.

Abstract: A golf ball includes a center, a mid layer, a cover and dimples. The cover has a Shore D hardness of 30-50. The golf ball has an amount of compressive deformation of 3.0-5.0 mm. The ball meets a mathematical formula (I): 0.80?((L1+L2)/2)?0.95??(I). L1 represents a ratio of a lift coefficient relative to a drag coefficient, the lift coefficient and the drag coefficient being measured under conditions of a Reynolds number of 1.290×105 and a spin rate of 2820 rpm. L2 represents a ratio of a lift coefficient relative to a drag coefficient, the lift coefficient and the drag coefficient being measured under conditions of a Reynolds number of 1.771×105 and a spin rate of 2940 rpm.

Abstract: A golf ball according to an aspect of the present invention is a golf ball having a large number of dimples, a surface of the golf ball is covered with a plurality of virtual flat surfaces each having a triangular shape, one or more dimples are arranged so as to correspond to each of the virtual flat surfaces, and an edge of each dimple is formed in a linear shape. Each dimple may have a triangular pyramid shape or a triangular frustum shape.

Abstract: A golf ball 2 has a plurality of dimples 10 on a surface thereof. Each dimple 10 has a center portion 16 and an edge portion 18. The center portion 16 has a bowl shape. The edge portion 18 has a ring shape. The edge portion 18 is smoothly continuous with the center portion 16. A cross-sectional shape of the edge portion 18 is a curved line that is convex outward in a radial direction of the golf ball 2. A ratio P1 of a number N1 of the dimples each having an edge portion 18 that is adjacent to another edge portion 18 such that the edge portion 18 shares a boundary line with the other edge portion 18, to a total number N of the dimples, is not less than 50%.

Abstract: A golf ball has a plurality of dimples on a surface thereof. Each dimple has a center portion and an edge portion. The center portion has a bowl shape. The edge portion has a ring shape and is smoothly continuous with the center portion. A cross-sectional shape of the edge portion is a curved line that is convex outward in a radial direction of the golf ball. A sum Vc of volumes of the center portions and a sum Vd of volumes of the dimples satisfy the following mathematical formula: (Vd?Vc)/Vc?2.15. A ratio of a number of the dimples, the center portion of each dimple having a circular contour and the edge portion of each dimple having a non-circular contour, to a total number of the dimples, is not less than 50%.

Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average pitch Pav of these minute projections 18 is less than 100 ?m. An average height Hav of these minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. The golf ball satisfies the following mathematical formula. Lav<3*Tav In the mathematical formula, Lav represents an average value of distances L between the minute projections 18 and other minute projections 18 adjacent to the minute projections 18, and Tav represents an average value of widths T of these minute projections 18.

Abstract: An object of the present invention is to provide a golf ball traveling a great distance on driver shots.

Abstract: A golf ball 2 includes a core 4 and a cover 6. An amount of compressive deformation Df of the core 4 is equal to or greater than 4.1 mm. A nominal thickness T of the cover 6 is equal to or less than 1.70 mm. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A value V calculated by the following mathematical formula is equal to or less than 290. V=N*So/Bb In the mathematical formula, N represents a total number of the dimples 8, So represents a ratio of a total area of all the dimples 8 relative to a surface area of a phantom sphere of the golf ball 2, and Bb represents an average (mm) of thicknesses B of the cover 6 immediately below deepest points of the dimples 8.

Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. The surface of the golf ball has a maximum height Sz of not less than 5 ?m and not greater than 200 ?m.

Abstract: A golf ball 2 includes a core 4, a mid layer 6 positioned outside this core, and a cover 8 positioned outside this mid layer. When a total thickness of the mid layer 6 and the cover 8 is denoted by L (mm), a Shore C hardness at a point A away from a surface of the core 4 toward a central point of the core 4 by 5L (mm) is denoted by Ha, a Shore C hardness at a point B away from the surface of the core 4 toward the central point of the core 4 by 2.5L (mm) is denoted by Hb, and a Shore C hardness at the central point of the core 4 and Shore C hardnesses of the mid layer 6 and the cover 8 are denoted by H0, Hm, and Hc, respectively; the golf ball 2 satisfies Hc?Hb>0, Hm?H0>0, and Ha?Hm>0.

Abstract: A golf ball (2) includes a core (4), an inner cover (6), a main cover (8), and an outer cover (10). X=Hc×Rc×0.05, S=Hs×Rc×0.05, M=Hm×Tm, I=Hi×Ti, O=Ho×To, and Q=(I+O)/2 that are calculated from a radius Rc of the core (4), a Shore C hardness Hc at a central point of the core (4), a Shore C hardness Hs at a surface of the core (4), a thickness Tm of the main cover (8), a Shore C hardness Hm of the main cover (8), a thickness Ti of the inner cover (6), a Shore C hardness Hi of the inner cover (6), a thickness To of the outer cover (10) and a Shore C hardness Ho of the outer cover (10), satisfy 15?M?S?100, 0.25<Q/M<0.5, ?10?I?O?30, and Q/X<0.8.

Abstract: A golf ball (2) includes a core (4), an inner cover (6), a main cover (8), and an outer cover (10). X=Hc×Rc×0.05, S=Hs×Rc×0.05, M=Hm×Tm, I=Hi×Ti, O=Ho×To, and Q=(I+O)/2 that are calculated from a radius Rc of the core (4), a Shore C hardness Hc at a central point of the core (4), a Shore C hardness Hs at a surface of the core (4), a thickness Tm of the main cover (8), a Shore C hardness Hm of the main cover (8), a thickness Ti of the inner cover (6), a Shore C hardness Hi of the inner cover (6), a thickness To of the outer cover (10) and a Shore C hardness Ho of the outer cover (10), satisfy 15?M?S?100, 0.25<Q/M<0.5, ?10?I?O?30, and Q/X?0.8.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average depth Fav of the dimples 12 and an average height Hav of the minute projections satisfy the following mathematical formula (1). Hav/Fav?0.050 ??(1) A ratio M (%) of a sum of areas of all the dimples 12 relative to a surface area of a phantom sphere of the golf ball and an average value Pav (?m) of pitches P each between a minute projection 18 and another minute projection 18 adjacent to this minute projection 18 satisfy the following mathematical formula (2). M/Pav>0.

Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is molded in a mold having support pins by injection molding. A ratio (K/S) of a surface hardness K of the core 4 to an amount of compressive deformation S of the core 4 satisfies the following mathematical formula. 13.0?K/S?24.0 The cover 6 has a hardness H of not greater than 62. A product (?*V) of a latitude ? of each support pin and a volume V of the cover 6 is not less than 300.

Abstract: A golf ball 2 has a core 4, an inner cover 6, a main cover 8, and an outer cover 10. A product TH2 of a thickness T2 (mm) and a Shore C hardness H2 of the main cover 8 and a product THs of a value of 5% of a radius (mm) of the core 4 and a Shore C hardness Hs at a surface of the core 4 satisfy the following mathematical formula. 15?(TH2?THs)?100 A product TH1 of a thickness T1 (mm) and a Shore C hardness H1 of the inner cover 6, a product TH3 of a thickness T3 (mm) and a Shore C hardness H3 of the outer cover 10, and the product TH2 satisfy the following mathematical formula. 0.25<((TH1+TH3)/2)/TH2<0.