The importance of shaft fitting
Shaft fitting is an important component of any fitting, and something players should give considerable attention to when buying new clubs. Modern day shaft characteristics vary significantly in weight, flex, bend profiles and torque. The different elements of a particular shaft have a big influence on the delivery of the club head affecting both performance and consistency. Because each player’s swing characteristics are different it is safe to say no two players will respond the same to a particular shaft type.
So how does one determine what type shaft might be the best fit for them? Typically a starting point for a driver shaft is based on the player's swing speed and tempo. During the process the player will hit numerous shafts until we find the optimal one. The determining factors will be more consistent performance, increased distance and a tighter dispersion. The player's feedback about the shaft's feel and weight is also an important consideration.
Here are three reasons why a player should have his shafts fitted rather than buying clubs off the rack
Not all shaft flex codes are equal - Because there is no industry standard for flex codes one shaft company's "regular" may be another company's "stiff." Hence, two shafts with different flex codes may have a very similar flex. The only way to accurately compare the overall stiffness or "static flex" of two shafts is to use a shaft deflection board or shaft frequency meter.
I want the same shaft in my new irons - Keep in mind just because a shaft worked well with one set of irons doesn't guarantee it will perform equally in a different model set. The properties of the head (such as weight mass and center of gravity) can differ considerably from model to model. The way a shaft responds to a club head will depend on the design aspects of the head itself.
I already know what shaft I need - Players often presume they need a particular shaft because that is what they have always used. Keep in mind tour players spend a lot of time at equipment companies testing shafts in order to optimize their performance. Players are sacrificing performance and consistency by not taking advantage of the same opportunity. Comparing shafts in a fitting environment and measuring their performance is the best way to find a player's optimal shaft.