Do you know your
Find the perfectly matched shaft in 3 swings
Just ten years ago the most complex shaft choice a serious golfer had to make
was ‘Stiff or regular?’ Now the massive growth of custom fitting has thrown up
so many options that the average player has more ways to get it wrong than
Faced with this problem, Mizuno has developed a cutting edge technology that takes shaft -
fitting to a whole new level. In creating Swing DNA a unique system that identifies the unique
blueprint in every swing - Mizuno has addressed the most critical element of the entire custom
Specially-created software sifts through the mass of shaft options to select the optimal match,
based on Swing DNA recorded by Mizuno’s Shaft Optimizer. What was once a time-
consuming and inaccurate process is now one that is immediate, consistent and widely
On traditional custom built sets shaft recommendations were based on the theory that fast
swingers required stiff shafts, while everybody else was a regular. Twenty years on the
Mizuno range of custom iron shafts has evolved to more than 50 options, with only a few
State of the Art Facilities able to take advantage.
“What’s the right shaft? Is the most common question people have when they
visit our National Fitting Centres. The development of lightweight steel like
the Dynalite Gold XP and Tour promoted shafts like the Project X and KBS
means we’ve a lot more tools to work with – but it leaves most people more
confused.” Mark Duncombe, European Tour Technician
Mizuno’s new Shaft Optimizer changes everything. A real golf club with specially developed
strain gauges and microprocessor, the Shaft Optimiser records the individuals Swing DNA
from just 3 real shots. Combined with exclusive Mizuno software the unique DNA is used to
narrow down a baffling prospect of more than 50 shafts to the very best match – with 2 back
up suggestions to test against.
The Shaft Optimizer is unique in the amount of information it records. Club head speed and
tempo might typically determine the ideal flex and weight of the shaft, but with so many
variables to consider - weight, flex, kick point, tip softness – much more hard data is required
to accurately determine a player's optimum shaft. The Shaft Optimizer also measures shaft
toe down, shaft kick angle and release factor readings in order to build up the player’s unique
“Identifying the complete Swing DNA Blueprint is hugely important because
two players with identical speeds can need completely different shafts to
maximise their flight. Players who release the club early, for example, need a
different bending profile to those who favour a late hit. Their swing speeds
might be the same, they might even need the same flex, but fitting them for
the same shaft could be disastrous.”
Theory vs Reality
Mizuno’s (Swing DNA) process incorporates an interchangeable shaft system so that the
recommended shaft / head combination can be tested as confirmation.
Offering a choice of head weights – standard, lighter and graphite-weighted each test iron is
designed to feel and play exactly like Mizuno’s final production models. To ensure that the
extra weight of the specially-made titanium adaptor didn’t impact on the club’s playing
properties, 8 grams of mass was removed from the hosel of the test head. Any combination
of shaft and head screwed together during the fitting process, will have the weight, feel and
performance of a final production iron.
“A player can go to any of Mizuno’s (Swing DNA) Fitting centres around the
country and be fit to the perfect shaft within 15 minutes. The fitter can apply
their skills to the more constant components– length, lie angle, grip size,
knowing that our (Swing DNA) Fitting System will look after the engine if the
club – the shaft.” Mark Duncombe
For a list of Mizuno (Swing DNA) Fitting centres visit
SWING DNA – What’s the blueprint?
Clubhead speed: How fast the clubhead and shaft are moving during the swing.
Tempo: How quickly a player transitions from the backswing to the downswing.
Shaft Toe Down: A measure of the bowing of the shaft in a downward
direction during the downswing.
Shaft Kick Angle: The amount of shaft forward bending during the
Release Factor: How and when the clubhead and shaft are releasing
during the downswing.