GolfWRX Launch Report: Mizuno ST

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What you need to know: The product of Mizuno's Speed Technology (ST) Metalwood Project — four years of rapid-fire metalwoods development — 2023 Mizuno ST-Z 230, ST-X 230, and ST-PLTNM feature the centerpiece Cortech Chamber, within which a steel weight is positioned for increased ball speed and spin reduction. The technology extends to the ST-Z 230 fairway wood and hybrid as well.

Cortech Chamber: Through slot provides additional COR area by providing sole flex filled with elastomeric TPU material for additional flexure and face stress reduction. Inside the TPU is a stainless steel weight, which is positioned close to the clubface for increased speed and spin reduction. Also contributes to a solid feeling at impact.

SAT 2041 Forged Beta Titanium Face: More flexible and stronger than 6-4 titanium.

"Our player testing over the years shows that placing extra weight close to the face results in faster ball speeds and low spin rates," says David Llewellyn, Director of R&D for Mizuno. "We’ve been steadily working towards the CORTECH Chamber, which is incredibly effective at that job. Encasing the steel weight within the TPU Chamber means that we’re moving weight close to the face at the same time as creating an additional source of energy. Steel is twice the density of Titanium but won't weld directly, which is where the TPU has a second role."

Drivers

ST-Z

Availability: Right Hand – 9.5 and 10.5 degreesLeft hand – 9.5 degrees only

ST-X

Availability: Right Hand – 9.5, 10.5, and 12 degreesLeft hand – 9.5 degrees only

Fairway wood

Right Hand – 3 wood (15) and 5 wood (18)Left hand – 3 wood (15)

Hybrid

Availability: Right Hand – 2H (16), 3H (19), 4H (22) and 5H (25)Left Hand – 3H (19) and 4H (22)

Pricing

ST-Z 230 Driver / ST-X 230 Driver: $499.95ST-Z 230 PLTNM Driver: $549.95ST-Z 230 Fairway Woods: $299.95

At retail: February

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Scott

Jan 20, 2023 at 9:53 am

Fairways & hybrids are looking good. Shaft options are super limited – I guess that's a payoff for a less than premium price point. Heads up to anybody that plans on building a separate shaft – Mizuno's adapter has an off-center bore. If you find an adapter, it will look defective – that's the design.

Justin

Jan 19, 2023 at 8:02 pm

Maybe the best looking hybrid I’ve ever seen

Tom K

Jan 19, 2023 at 1:43 pm

Drivers from the different manufacturers all have similar designs.

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Driver: TaylorMade SIM2 (9 degrees @7.5 degrees)Shaft: Project X HZRDUS Black

4-wood: TaylorMade Stealth 2 Plus (16.5 degrees @17.25)Shaft: Project X HZRDUS Black 80 TX

Irons: TaylorMade P790 (2), Mizuno Pro 221 (4-9)Shafts: Project X HZRDUS Black 105 TX (2), True Temper Dynamic Gold Tour Issue X100 (4-9)

Wedges: Mizuno T22 (45-05S), Titleist Vokey Design SM9 (52-08F, 56-08M, 60-04L, 60-08M)Shafts: True Temper Dynamic Gold Tour Issue X100

Putter: TaylorMade Spider XGrip: SuperStroke Zenergy Pistol 2.0

Ball: Titleist Pro V1

Grips: Golf Pride ZGrip Cord

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Driver: TaylorMade M4 (9.5 degrees)Shaft: Fujikura Speeder 661 Evolution 2.0 Tour Spec X

3-wood: TaylorMade M4 3HL (16.5 degrees)Shaft: Project X HZRDUS Black 95 6.5

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Grips: Golf Pride Tour Velvet (standard size built up with 3 wraps of tape in the right hand, 2 wraps in the left and 2 way tape on all)

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Vokey describes the 64 W Grind

"The 64W is a unique wedge made for players who play in firm conditions, golf courses with elevated greens and tricky short-sided lies. This wedge is made for the player with quick hands who likes to see the ball elevate quickly, the fearless player who isn't afraid to attack any pin. The sole is a medium-width sole with slight camber and an effective bounce of 4°."

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