MORE WORKABLE, MILD DRAW BIASED
A more rounded, deeper profile with weight located closer to the hosel – means slightly higher spinning and draw biased for the majority, but more workable for many elite players (especially in lower lofts).
Natural drawers of the ball may find more ball speed from the ST-X. Boosted by the CORTECH Chamber to be faster from the face, spin less and deliver an incredible, solid sensation at impact.


CORTECH Chamber
Mizuno’s CORTECH Chamber encases a 3 gram stainless steel weight with elastomeric TPU – taking stress from the clubface and creating an additional source of energy.


Shorter CG to Shaft Axis
Toe Side Composite with shorter CG to shaft axis distance.


Deeper CG
Design focus is a combination of deeper CG and shorter CG distance for a balance of workability in both directions while providing higher MOI and mid/low spin.
Specifications
| Model | Lie Angle (Std) | CC | Length | Shaft Flex | Hand |
| 9.5° | 59° | 460 | Custom | Custom | *RH/LH* |
| 10.5° | 59° | 460 | 45″ | L** ,A (sr), R | RH |
| 12° | 59° | 460 | 44″***/45″ | L, A (sr) | RH |
* Custom Only
** Ladies Driver available in Custom only
*** 44″ Ladies Driver
Shafts
UST Mamiya Helium Nanocore 40
Ultra High Performance lightweight golf shaft design, featuring our new Nanocore Technology for increased clubhead speed. Innovative materials and design profile stabilize shaft flexural and torsional characteristics in harmony with the ultra light weight design to optimize shaft performance and consistency with precise feel.Designed to keep torque low under the demands of today’s high-velocity swings, Kai’li White features an extremely strong MR70-reinforced tip to promote consistent center-face impact and tighter dispersion.
UST Mamiya Lin-Q Red 50
UST Mamiya engineers have created a new, higher performance LIN-Q shafts with increased strength and phenomenal feel. Incorporating M40X into the tip area provides significantly improved lateral stability to the shaft during the golf swing, thereby delivering increased energy to the golf ball at impact.
| Model | Flex | Shaft Weight | Launch | Spin | Torque |
| UST Mamiya Helium Nanocore 4F1 | Lady | 43g | High | High | 6.3 |
| UST Mamiya Helium Nanocore 4F2 | Senior | 45g | High | High | 6.3 |
| UST Mamiya Lin-Q Red 50 | Regular | 57g | Mid-High | Mid | 5.7 |
















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