Golf club

1. A wood type golf club head comprising:

a golf club body defining an interior cavity including a sole, a crown connected to the sole by a skirt, and a hosel connected to at least one other feature of the golf club body;

a face connected to a front end of the golf club body, the face including a center of the face defining an origin of a reference coordinate system having an x-axis being tangent to the face and parallel to a ground plane when the golf club head is positioned at address, a y-axis being orthogonal to the x-axis and parallel to the ground plane, and a z-axis being orthogonal to both the x-axis and y-axis;

at least one protrusion extending above a portion of the crown, wherein the at least one protrusion is located entirely forward of a center of gravity (CG) of the golf club head and extends from the face;

wherein the at least one protrusion has a height measured in a direction parallel to the z-axis, a length measured in a direction parallel to the y-axis, and a width measured in a direction parallel to the x-axis;

wherein the golf club head has a vertical CG location (Δz) positioned vertically below the origin as measured relative to the ground plane, and a y-axis CG location (Δy) positioned rearward of the protrusion;

wherein at least a portion of the crown is located between a highest point of the at least one protrusion and a point at which a maximum crown height occurs; and

wherein said at least a portion of the crown is of a lower height than both the highest point of the at least one protrusion and the point at which the maximum crown height occurs as measured from the ground plane parallel to the z-axis.

2. The wood type golf club head of claim 1 , wherein the at least one protrusion is integrally formed with the golf club body and has a width as measured parallel to the x-axis of at least 30 mm; and

wherein the golf club head has a head length from a leading edge to a trailing edge no less than 73 mm, a maximum crown height of no less than 30 mm, and a volume of up to 200 cc.

3. The wood type golf club head of claim 2 , wherein the highest point of the at least one protrusion is about the same as the maximum crown height as measured from the ground plane parallel to the z-axis.

4. The wood type golf club head of claim 2 , further comprising a rearward mass pad located within the interior cavity and positioned rearward of the CG of the golf club head proximate a rear portion of golf club head;

the rearward mass pad further including a threaded aperture configured to retain at least a portion of a weight; and

wherein the threaded aperture is located on the sole and has a central axis that extends through the sole and crown of the golf club body.

5. The wood type golf club head of claim 4 , further comprising a second threaded aperture, wherein the first threaded aperture and the second threaded aperture are similarly sized such that the second threaded aperture is configured to at least partially retain the weight.

6. The wood type golf club head of claim 5 , wherein the second threaded aperture is located on the sole.

7. The wood type golf club head of claim 1 , wherein the at least one protrusion creates a step such that the crown steps down aft of the at least one protrusion.

8. The wood type golf club head of claim 1 , further comprising a forward mass pad located forward of the center of gravity of the golf club head.

9. A wood type golf club head comprising:

a golf club body defining an interior cavity including a sole, a crown connected to the sole by a skirt, and a hosel connected to at least one other feature of the golf club body;

a face connected to a front end of the golf club body, the face including a center of the face defining an origin of a reference coordinate system having an x-axis being tangent to the face and parallel to a ground plane when the golf club head is positioned at address, a y-axis being orthogonal to the x-axis and parallel to the ground plane, and a z-axis being orthogonal to both the x-axis and y-axis;

at least one protrusion extending above a portion of the crown, wherein the at least one protrusion is located entirely forward of a center of gravity (CG) of the golf club head and extends from the face;

wherein the at least one protrusion has a height measured in a direction parallel to the z-axis, a length measured in a direction parallel to the y-axis, and a width measured in a direction parallel to the x-axis;

wherein the golf club head has a vertical CG location (Δz) positioned vertically below the origin as measured relative to the ground plane, and a y-axis CG location (Δy) positioned rearward of the protrusion;

a removable shaft system configured to adjustably attach a golf club shaft to the golf club head, the removable shaft system comprising a sleeve configured to attach to the golf club shaft and a fastener to secure the sleeve to the golf club head;

a rearward mass pad located within the interior cavity and positioned rearward of the CG of the golf club head proximate a rear portion of golf club head; and

a forward mass pad located within the interior cavity and positioned forward of the CG of the golf club head proximate the front end of golf club head;

wherein at least a portion of the crown is located between a highest point of the at least one protrusion and a point at which a maximum crown height occurs; and

wherein said at least a portion of the crown is of a lower height than both the highest point of the at least one protrusion and the point at which the maximum crown height occurs as measured from the ground plane parallel to the z-axis.

10. The wood type golf club head of claim 9 , wherein the rearward mass pad further including a threaded aperture configured to retain at least a portion of a first weight.

11. A wood type golf club head comprising:

a golf club body defining an interior cavity including a sole, a crown connected to the sole by a skirt, and a hosel connected to at least one other feature of the golf club body;

a face connected to a front end of the golf club body, the face including a center of the face defining an origin of a reference coordinate system having an x-axis being tangent to the face and parallel to a ground plane when the golf club head is positioned at address, a y-axis being orthogonal to the x-axis and parallel to the ground plane, and a z-axis being orthogonal to both the x-axis and y-axis;

at least one protrusion extending above a portion of the crown, wherein the at least one protrusion is located entirely forward of a center of gravity (CG) of the golf club head and extends from the face;

wherein the at least one protrusion has a height measured in a direction parallel to the z-axis, a length measured in a direction parallel to the y-axis, and a width measured in a direction parallel to the x-axis;

wherein the golf club head has a vertical CG location (Δz) positioned vertically below the origin as measured relative to the ground plane, and a y-axis CG location (Δy) positioned rearward of the protrusion;

a removable shaft system configured to adjustably attach a golf club shaft to the golf club head, the removable shaft system comprising a sleeve configured to attach to the golf club shaft and a fastener to secure the sleeve to the golf club head; and

a weight attached to the golf club body, wherein the weight is selectively securable to the golf club body at a first position, a second position, and a third position;

wherein the first position is located heel-ward of the origin and the third position is located toe-ward of the origin, and the second position is located between the first position and the third position;

wherein at least a portion of the crown is located between a highest point of the at least one protrusion and a point at which a maximum crown height occurs; and

wherein said at least a portion of the crown is of a lower height than both the highest point of the at least one protrusion and the point at which the maximum crown height occurs as measured from the ground plane parallel to the z-axis.

12. The wood type golf club head of claim 11 , wherein the first position comprises a first threaded aperture, the second position comprises a second threaded aperture, and the third position comprises a third thread aperture, and the first, second, and third threaded apertures are similarly sized.

13. The wood type golf club head of claim 12 , wherein the first, second, and third threaded apertures are located on the sole.

14. The wood type golf club head of claim 11 , wherein the weight is a weight assembly having a mass between about 0.5 grams and 20 grams.

15. The wood type golf club head of claim 14 , wherein the first position and the third position are separated by a distance Lg that is at least 50 mm.

16. The wood type golf club head of claim 15 , wherein the weight assembly has a mass of at least 10 grams.

17. The wood type golf club head of claim 16 , wherein at least a portion of the at least one protrusion is angled with respect to the club head face.

18. The wood type golf club head of claim 17 , wherein the face is welded to the front end of the golf club body and the face has a variable thickness.

19. The wood type golf club head of claim 18 , wherein the at least one protrusion has a height of at least 0.5 mm and no more than 10 mm.

20. The wood type golf club head of claim 17 , wherein the crown of the golf club head having an apex and the at least one protrusion is positioned forward of the apex.