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General Golf Club Information

Shaft Information (Flex, Model and Specifications)

Selecting the proper shaft for your golf clubs is both important and a bit complicated. For woods such as drivers, fairway woods, and hybrids, graphite shafts are typically the only option available, and for good reason. Graphite is lighter, stronger, and helps launch the ball higher and farther when swinging golf clubs with larger heads designed for distance. However, once you get into the realm of irons and wedges, you'll need to chose between both steel and graphite options, depending on your swing speed and ability. Steel will typically be stiffer and offer stronger golfers better distance and trajectory control, while graphite is lighter, allowing slower swing speeds or golfers who hit a low ball the ability to hit higher, softer landing shots at the green.

Next, you need to select an appropriate stiffness, or flex. The most common options are regular, stiff, x-stiff, uniflex, women's and senior. Each offer different features and benefits that will enhance the game of different swing speeds and skill levels. After flex, there are also a wide variety of manufacturers and models, all offering differences in performance and specifications. Below, we'll break down the process step-by-step, and make recommendations on how to select a shaft option that will work best for your game.

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When purchasing a golf club, be it a driver, hybrid, or set or irons, selecting the proper shaft flex becomes essential. Flex refers to the shafts ability to bend as the force of the golf swing is applied. If a shaft bends too much, it can lead to a loss in control and accuracy, while if a shaft doesn't bend enough, it can result in a too low trajectory, a loss of distance, and a harsh feel at impact. Choosing the correct shaft flex will help golfers maximize distance and accuracy when correctly paired with their swing speed.

Golfers with higher swing speeds (typically 90mph and higher) should consider stiff or extra-stiff shaft offerings in order to utilize a slightly lower, more penetrating launch angle to maximize distance. While stiff is a common selection for stronger, more accomplished golfers, the jump to X-Stiff is usually only reserved for the top percentage of swing speeds and is typically recommended by a golf instructor or teaching professional.

Golfers with lower swing speeds should consider Regular, Senior, Uniflex or Women’s flex in their shafts. These more flexible shafts will help slower swingers get the ball in the air easier, leading to greater carry and distance. Regular is the standard option for most amateur golfers and will appeal to a great deal of swing speeds and skill levels. Senior flex is more flexible than regular, and is designed to help slower swing speeds gain distance and trajectory. The same goes for women's flex, which is designed for most women golfers and even more flexible than the senior option. Uniflex, or “R-S” is a flex that falls between regular and stiff. Uniflex is great for athletic beginners or fast swing speeds that aren't quite fast enough for the stiff flex. More often than not, a golfer will experience a decrease in performance and results with a too stiff flex more than an overly flexible option. So when in doubt about which shaft most appropriately fits your swing, it's best to err on the side of the more flexible, easier to control shaft flex.

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Shaft Model

There are a wide variety of golf shaft manufacturers out there, and each manufacturer produces many different shaft models for a large range of skill levels and desired features. The majority of golf clubs come available for sale with stock options, shaft models that the club company has paired with their product for an optimal performance blend. Some clubs are available with multiple stock options to chose from, while just about every golf club can be customized with after-market shaft options available through special order (sometimes up-charges may apply). More experienced and skilled golfers may benefit from custom shaft offers, utilizing the technology to reduce spin, lower trajectory, or account for unique swing characteristic. For most beginning and intermediate golfers, stock options are generally acceptable choices and there's little need to worry about custom shaft options. Beyond different manufacturers and models of club shafts, there are also a selection of shaft specific terms that are useful to know and understand.

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The weight of the shaft will have the greatest affect on the overall weight of the golf club as a whole. A lighter shaft will result in a club that is easier to swing, increasing swing speed and for many golfers, increasing distance. Many manufacturers have recently begun to utilize more lightweight clubs and shaft technology in order to provide a distance benefit to average golfers. However, a club shaft that is too light can result in a performance decrease for golfers with stronger swing speeds or quick tempos, with the shaft bending and twisting too much throughout the golf swing, causing inconsistent, off-center impact and a loss of distance and accuracy.


The amount of torque in the shaft of a golf club refers to the shafts resistance to twisting, particularly during a golfers’ downswing. Expressed in degrees, a shaft with a lower torque is more resistant to twisting, while a higher Torque is less resistant. Golfers with fast swing speeds, quick tempo, and aggressive downswings will benefit from a shaft with lower torque that will keep the club head square through impact, not allowing the strength of the golfers swing to twist the clubface open or closed. Golfers with slower, less aggressive swings will want to stick with a regular, standard torque in their shafts, as using a shaft with too low torque could result in lower ball flight and inconsistent feel, even on pure shots.

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Kickpoint, also referred to as flex point, bend point, or bend profile, is the point on a particular golf shaft where it exhibits the greatest amount of flex. A shaft said to have a low kickpoint would bend more towards the lower tip of the shaft, while a mid-to-high kickpoint would bend higher along the shaft, depending on specifications. The lower the kickpoint is on the shaft equates to how high a ball flight that particular shaft will promote. Golfers looking for help getting the ball airborne should consider a lower kickpoint than golfers who desire the lower, more penetrating ball flight created by a higher kickpoint.

Forgiveness / MOI

A major performance benefit of many golf clubs is their ability to produce straight, accurate shots. Straight golf shots don't lose distance due to excess side spin on the golf ball, distance traveled laterally and not up the fairway, and also avoid penalty strokes and course hazards. Forgiveness in a club head, also known as a “High MOI” is what helps correct for a less than stellar impact position and allows golfers to keep their shots straight despite off-center contact of a twisted club through the hitting zone.

A property of physics, moment of inertia, (or MOI) applies to how difficult it is for any particular object to rotate around its own axis. To understand this, think about two wheels, equal in weight but different in size. The larger wheel, with its total mass spread farther from its rotational axis, is more difficult to rotate, giving it a larger moment of inertia than the smaller wheel.

A high moment of inertia in a clubhead allows for more forgiveness on off-center hits, less sidespin on shots, and reduces clubhead twisting on contact. When the clubhead makes contact with the ball, and especially when contact is made on the heel or toe of the face outside of the clubhead’s sweet spot, the clubhead will attempt to rotate around its vertical axis, and twist in the player’s hands. A high MOI makes this rotation more difficult, keeping the clubhead square, and promoting straighter shots, even on mis-hits.

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Center of Gravity

A quick and easy way to think about center of gravity is this: The lower the CG, the higher the ball flight. More technically, the center of gravity within an object is the intersection of all possible balance points and where the total weight of the object is concentrated. Within a clubhead, this point can be measured in three different ways: Vertically from the sole to the top of the club, horizontally from the hosel of the club to the opposite edge, and in terms of depth within the clubhead from the face.

The height and depth of a clubs CG is what most directly influences ball flight. A low center of gravity, further back from the face of the club, will promote a higher trajectory than a high center of gravity located closer to the face. Horizontal CG affects shot shaping and shot accuracy. A horizontal CG closer to the shaft of the club will help close the clubface on downswing, promoting a right-to-left ball flight and/or reducing a slice/fade. In contrast, a horizontal CG further towards the toe of the club will keep the clubface open on downswing, leading to a left-to-right ball flight and/or help to reduce a hook/draw.

Coefficient of Restitution (COR)

The higher the Coefficient of Restitution, or COR, of a golf club, the hotter the face will be, resulting in distance gains. COR is a measurement of the amount of energy either lost or retained when two objects collide, i.e. a clubhead and a golf ball. This measurement is presented as a number between 0.000 (all energy is lost in collision) and 1.000 (a perfect collision in which all energy is transferred from one object to the other). Currently, the USGA has placed a maximum limit on COR in golf clubs at 0.830, allowing a maximum of 83% energy transfer from club to ball at impact.

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