A straight bias driver with great stability on off centre hits. Similar in look and character to the previous ST-Z.

Boosted by the CORTECH Chamber to be faster from the face, spin less and deliver an incredible, solid sensation at impact.

THROUGH SLOT PROVIDES ADDITIONAL CORAREA BY PROVIDING SOLE FLEX

TPU MATERIAL ALLOWS SOLE FLEXURE FOR FACE STRESS REDUCTION

TPU MATERIAL PROVIDES SOUND TUNING/DAMPING FOR ENHANCED SOLID FEEL

INSERTED STAINLESS STEEL WEIGHT, IDEALLY LOCATED FOR SPIN REDUCTION

“Tour tests for the ST 230 SERIES have all been very consistent – relief that the look is similar at address. Then shock at how much better the new ST-Z 230 feels off the face. Ball speeds are up on average 2-5mph with a drop in back spin of around 200 rpm.”

CHRIS VOSHALL / MIZUNO GOLF

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.

Balanced Composite for neutral weight distribution

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.

MIZUNO ST-G 440CC DRIVER ON TEST

SPECIFICATIONS

SHAFT