Examples of golf club shafts and methods to manufacture golf club shafts are generally described herein. In one example, a golf club shaft includes a first tubular portion formed from a first material and coupled to a second tubular portion having a plurality of layers formed from a second material and a third material. A reinforcing member is disposed in at least one of the plurality of layers and is formed from a fourth material. The reinforcing member extends a length that is less than or equal to a length of the second tubular portion. The first, second, third, and fourth materials are different from one another. Other examples and examples may be described and claimed.

Examples of golf club shafts and methods to manufacture golf club shafts are generally described herein. In one example, a golf club shaft includes a first tubular portion formed from a first material and coupled to a second tubular portion having a plurality of layers formed from a second material and a third material. A reinforcing member is disposed in at least one of the plurality of layers and is formed from a fourth material. The reinforcing member extends a length that is less than or equal to a length of the second tubular portion. The first, second, third, and fourth materials are different from one another. Other examples and examples may be described and claimed.

A golf club head has a body defining a ball striking face. The body further has a rear portion comprising a plurality of side walls and a planar lower portion. The plurality of side walls extend downward from a top of the golf club head towards the planar lower portion. The body further comprises a cover extending over the rear. The body further defines a gap between the cover and the planar portion.

A golf club shaft system and golf club shaft possessing unique characteristics including flexural and torsional rigidity profiles.

A golf club shaft system and golf club shaft possessing unique characteristics including flexural and torsional rigidity profiles.

An elongate tubular shaft body having a stack of wrapped layers of fibrous reinforcement in a resin matrix, a portion of the stack of wrapped layers circumferentially surrounding a first surface part of a fibrous layer has a non-constant width which varies non-linearly with a change in radius of an inner elongate circumferential surface in the portion, and wherein the fibrous reinforcement has fibres that are, along the length of the elongate tubular body, constantly oriented with respect to a cylindrical coordinate system about the longitudinal axis of the elongate tubular body, the fibre orientation in any said portion being independent of the geometry of the inner and outer elongate circumferential surfaces of that portion.

This disclosure relates to dampeners for sporting equipment wherein the dampeners dampen or attenuate energy, such as vibrations or sound. The dampeners include polymeric compositions having butyl rubber polymers and, optionally, resins based on phenol-formaldehyde. The dampeners can be used in sporting equipment that requires attenuation and absorption of impact, vibration, and/or sound, and the dampeners may provide cushioning to the user.

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.

Provided is a golf shaft, capable of ensuring bending rigidity required for a golf club and providing good hit feeling in a composite shaft with 50 g-130 g. The golf shaft comprises an element tube made of metal, an outer layer made of a fiber reinforced plastic and covering an outer periphery of the element tube over an entire length of the element tube in an axial direction, an adhesive layer interposed between the element tube and the outer layer to bond between the element tube and the outer layer, wherein weight of a whole including the element tube, the outer layer, and the adhesive layer is 50 g-130 g, and weight of the element tube is 50%-90% of the weight of the whole.