A golf club head with an adjustable weight assembly that includes a pair of stacked, rotatable circular plates with through-slots and a slidable weight that can move within the slots and clamp the plates together so that they are reversibly fixed to a body portion is disclosed herein. The plates are preferably composed of a lightweight material such as composite, and are located on the sole so that the weight assembly is visible to a user. The plate and slidable weight combination and allows for an increased range of personal performance customization by way of adjustability and interchangeability without using up available discretionary mass in the golf club head.

A golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.

A golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.

The invention described herein is an iron-type golf club head having an optimized mass distribution while also having the aesthetics of a full muscle-back iron. The iron-type golf club head comprises a main club head body, a lightweight, back-cavity insert, and a void within the lightweight, back-cavity insert configured to receive a CTP weight capable of adjusting mass characteristics of the iron-type golf club head.

The invention described herein is an iron-type golf club head having an optimized mass distribution while also having the aesthetics of a full muscle-back iron. The iron-type golf club head comprises a main club head body, a lightweight, back-cavity insert, and a void within the lightweight, back-cavity insert configured to receive a CTP weight capable of adjusting mass characteristics of the iron-type golf club head.

Golf clubs having weighting systems with movable weights are disclosed. In one embodiment, the golf club head includes: a main body having a periphery; and a weighting system including a movable weight, wherein the weighting system is configured to allow the weight to move between: a first position inward of the periphery of the main body; and a second position wherein at least a portion of the weight is located outward of the periphery of the main body. In other cases, the movable weight need not be movable to a position that is outward of the periphery of the main body.

Golf clubs having weighting systems with movable weights are disclosed. In one embodiment, the golf club head includes: a main body having a periphery; and a weighting system including a movable weight, wherein the weighting system is configured to allow the weight to move between: a first position inward of the periphery of the main body; and a second position wherein at least a portion of the weight is located outward of the periphery of the main body. In other cases, the movable weight need not be movable to a position that is outward of the periphery of the main body.

Golf club heads including a striking face with a variable thickness, a shell including a crown, and an internal weight pad located on a lower portion of the shell. The center of gravity depths of at least two golf club heads in a set satisfy the equation: D=a−b*LA, with 19 mm<a<22 mm and b=0.36 mm/degrees, and the at least two golf club heads have a difference in loft angle LA of at least 5 degrees. A moment of inertia about a vertical axis through the center of gravity of each of the at least two golf club heads is at least 2900 g*cm.sup.2. In one aspect, a striking face has a center region having a first thickness T1, an intermediate region having a second thickness T2, and a perimeter region having a third thickness T3, with T2<T1<T3.

Golf club heads including a striking face with a variable thickness, a shell including a crown, and an internal weight pad located on a lower portion of the shell. The center of gravity depths of at least two golf club heads in a set satisfy the equation: D=a−b*LA, with 19 mm<a<22 mm and b=0.36 mm/degrees, and the at least two golf club heads have a difference in loft angle LA of at least 5 degrees. A moment of inertia about a vertical axis through the center of gravity of each of the at least two golf club heads is at least 2900 g*cm.sup.2. In one aspect, a striking face has a center region having a first thickness T1, an intermediate region having a second thickness T2, and a perimeter region having a third thickness T3, with T2<T1<T3.

Embodiments of golf clubs with adjustable loft, lie, head mass and methods of manufacturing golf clubs with adjustable loft, lie, and head mass are generally described herein. Other embodiments can be described and claimed.