Golf club head with center of gravity adjustability that optimizes products of inertia

1. A wood-type golf club head comprising:

a metal body comprising a face, a rear portion, and a sole;

a composite crown;

a hollow tube positioned within the metal body;

a cartridge comprising a first material and a second material, the cartridge removably positioned within the hollow tube; and

at least one weight screw;

wherein changing the orientation of the cartridge within the tube changes the location of the center of gravity of the wood-type golf club head along a vertical Z axis;

wherein the products of inertia (Ixz and Iyz) of the golf club head have an absolute value below 100 g-cm 2 .

2. The wood-type golf club head of claim 1 , wherein the products of inertia (Ixz and Iyz) of the golf club head have an absolute value below 50 g-cm 2 .

3. The wood-type golf club head of claim 1 , wherein the body is composed of a titanium alloy material.

4. The wood-type golf club head of claim 1 , wherein changing the orientation of the cartridge within the tube changes the location of the center of gravity by no less than 0.050 inch along a vertical Z axis.

5. The wood-type golf club head of claim 1 , wherein changing the orientation of the cartridge within the tube changes the location of the center of gravity by at approximately 0.070 inch along a vertical Z axis.

6. The wood-type golf club head of claim 1 , wherein changing the orientation of the cartridge within the tube changes the location of the golf club head center of gravity by 0.068 inch to 0.085 inch along the vertical Z axis.

7. The wood-type golf club head of claim 1 , wherein the golf club head comprises an adjustable hosel.

8. The wood-type golf club head of claim 1 , wherein the golf club head comprises an adjustable plate on the sole.

9. The wood-type golf club head of claim 1 , wherein the tube is disposed closer to the face than to the rear portion.