A golf club head includes a first portion joined to a second portion to at least partially define an interior club head volume. The first portion includes a wall defining an outer boundary of the club head volume, and a support rib extending from the wall to operatively stiffen the first portion. The second portion of the golf club head can engage the support rib, and the support rib can be adhered to the second portion to join the first portion and the second portion.

Described herein is a golf club head that includes a body with a sole portion, a crown portion, a skirt portion, a forward region, and a rearward region. The golf club head also includes a face portion including a striking face with a maximum height from the ground plane of at least about 50 mm. A volume of the golf club head is at least about 370 cm.sup.3. The golf club head has a total club head mass between 190 grams and 210 grams, and the mass of the club head located above half of the peak crown height is less than or equal to 77 grams, and the percentage of the mass above half of the peak crown height is less than or equal to 39% of the total mass of the golf club head.

A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Golf club heads with improved aerodynamic properties. In an example, the golf club head has striking face; a sole connected to a bottom side of the striking face; a crown connected to a top side of the striking face. An aft slice of the golf club head includes a rearmost point, a toe-side aft slice on a toe side of the rearmost point, and a heel-side aft slice on a heel side of the rearmost point. The heel-side aft slice has a volume greater than a volume of the toe-side aft slice. The aft slice is defined as a portion of the golf club head to a rear of a slice line and between an outer perimeter of the golf club head and an offset perimeter slice curve.

Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: a shaft adapter, a collet, a ferrule, and a club head having an interior chamber. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts.

According to one aspect of the present invention there is provided an adjustable connector including at least two parts, each having a main body with a bore having a longitudinal axis therein, wherein an external surface of the main body of a first part is configured to bear against an internal surface of the bore of a second part when the first part is at least partially inserted into the bore of the second part to form a connection, characterized in that the positioning of the bores with respect to the main bodies is such that when the parts are connected to each other, rotation of one part with respect to the other changes the inclination of the longitudinal axes of the bores with respect to one another.

Disclosed are systems and methods of adjusting the playing orientation of the head of a golf club. An adjustment to the axis of the shaft in reference to the vertical plane is constrained within minimum and maximum limits, so as to conform to current and proposed changes to the United States Golf Association (USGA) rules of play. The fine adjustment within these constraints cannot be readily made, and all adjustable parts are firmly fixed, so there is no reasonable likelihood of them working loose during a round. The adjustments to the club are designed such that during a stipulated round, the playing characteristics of a club cannot be purposely changed by adjustment or by other means.

Disclosed herein are embodiments of iron-type golf club heads that comprise weight reducing features in the topline region of the club head that facilitate changing the Z-up location of the club head. In some exemplary embodiments, the body comprises a weight reducing feature in a topline weight reduction zone of the club head that extends over the entire face length from the par line to the toe portion ending at approximately the Z-up location of the iron type golf club head. The weight reducing feature results in a mass savings of about 2 g to about 20 g, and a Zup shift of about 0.5 mm to about 2.0 mm.

A golf club comprising: (a) a head having a face configured to make contact with a golf ball; (b) an extended portion extending from the head free of obstructing the face; and (c) a hosel movably secured to the head, wherein the hosel is configured to rotate relative to the head, or vice versa; wherein the rotation of the hosel relative to the head, or vice versa, changes the golf club between a left-handed position and a right-handed position.