A shaft 6 includes a tip end Tp and a butt end Bt. If a shaft length is defined as Ls, a distance between the butt end Bt of the shaft and a center of gravity G of the shaft is defined as Lg, and a ratio of the distance Lg to the shaft length Ls is defined as a ratio of the center of gravity of the shaft, then the ratio of the center of gravity of the shaft is equal to or less than 47%. The shaft length Ls is equal to or less than 991 mm. If a forward flex is defined as F1 (mm) and a backward flex is defined as F2 (mm), a flex point ratio C1 of the shaft calculated by the following formula (1) is equal to or less than 39%:
C1=[F2/(F1+F2)]100](1).

In an example embodiment, a golf club shaft is disclosed that comprises: a grip portion and a central shaft. The central shaft comprises a plurality of holes capable of being removably filled by one or more weighted plugs. In various example embodiments, the weighted plugs may be any weight desirable to the golfer, and may be positioned at any location on the shaft where there is a hole to customize the weighting of the golf club. In such embodiments, the weighted plugs may be made of a high density material and may weigh above about 14 grams.

Described herein is a system of golf clubs having shafts with ascending weights (shaft weights that increase as shaft lengths decrease). The system of golf clubs can be manufactured by implementing a method called stepping, which allows the system of golf clubs with ascending weights to be manufactured with reduced quantity of inventory.

Described herein is a system of golf clubs having shafts with ascending weights (shaft weights that increase as shaft lengths decrease). The system of golf clubs can be manufactured by implementing a method called stepping, which allows the system of golf clubs with ascending weights to be manufactured with reduced quantity of inventory.

A sports product may include a support member and an impact region configured to impact an object. The impact region may be coupled to the support member. The sports product may also include a shear thickening material in at least one of the support member or the impact region. The shear thickening material may be configured to exhibit shear thickening behavior when an impact occurs between the impact region and the object.

A sports product may include a support member and an impact region configured to impact an object. The impact region may be coupled to the support member. The sports product may also include a shear thickening material in at least one of the support member or the impact region. The shear thickening material may be configured to exhibit shear thickening behavior when an impact occurs between the impact region and the object.

Embodiments of adjustable length golf clubs and methods of manufacturing adjustable length golf clubs are generally described herein. Other embodiments may be described and claimed.

Embodiments of adjustable length golf clubs and methods of manufacturing adjustable length golf clubs are generally described herein. Other embodiments may be described and claimed.

A golf club and/or shaft with improved weighting characteristic is disclosed. More specifically, the present invention discloses to a golf club and/or shaft wherein the improved weighting distribution stems from an increase in the mass of the golf club and/or shaft at a specific distance away from the butt end or proximal end of the golf club to help increase the feel and minimize the dispersion of the golf shot by fine tuning the pull and or draw tendencies of a golf shot.

A golf club and/or shaft with improved weighting characteristic is disclosed. More specifically, the present invention discloses to a golf club and/or shaft wherein the improved weighting distribution stems from an increase in the mass of the golf club and/or shaft at a specific distance away from the butt end or proximal end of the golf club to help increase the feel and minimize the dispersion of the golf shot by fine tuning the pull and or draw tendencies of a golf shot.