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GolfWRX Launch Report: Mizuno ST-Z 230, ST-X 230 drivers, fairway wood, hybrid

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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.

Mizuno ST-Z 230, ST-X 230: What’s new, key technology

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.

Additional model details

ST-Z 230

  • Billed as a “straight, stable, and low spinning” driver. Designed for stability on off-center hits.
  • Engineers focused on positioning CG location being as close as possible to the Z-axis or neutral axis for lower spin, straight performance, and higher MOI.
  • Forged SAT 2041 Beta Ti face, aided by the Cortech Chamber, enhances ball speed and reduces spin
  • 14-gram back weight
  • Shallower CG for a more penetrating ball flight

ST-X 230

  • Billed as a “more workable, mild draw-biased” driver
  • Higher spinning, higher launching than ST-Z 230
  • Deeper CG and shorter CG distance for a balance of workability in both directions
  • 14-gram heel weight
  • Toe side composite for shorter CG to shaft axis distance
  • More rounded, deeper profile

ST-X PLTNM 230

  • An ultra lightweight driver for slower swing speeds
  • High launching
  • Draw biased
  • The ST-X PLTNM is 30g lighter overall than any possible custom option of the ST-X 230
  • High spec Helium Platinum Shaft and lightweight grip

What Mizuno says

“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.”

More photos

ST-Z 230

ST-X 230

ST-Z 230 Fairway Wood

  • A mid-low spinning, high launching, adjustable fairway wood
  • Mid-sized and playable for all levels
  • High energy MAS1C steel face boosted by Mizuno’s Cortech Chamber
  • The carbon composite crown for a low center of gravity
  • Quick Switch hosel offers 4 degrees of adjustability

ST-Z 230 Hybrid

  • A mid-low spinning, high launching, adjustable hybrid
  • High energy MAS1C steel face boosted by Mizuno’s Cortech Chamber
  • Waffle crown, thick sole weight create a deep center of gravity for high launch
  • With respect to the CLK, the ST-Z 230 is slightly larger

Price, specs, availability

Drivers

ST-Z

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

ST-X

Availability: Right Hand – 9.5, 10.5, and 12 degrees
Left 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: $499.95
ST-Z 230 PLTNM Driver: $549.95
ST-Z 230 Fairway Woods: $299.95

At retail: February

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GolfWRX Editor-in-Chief

7 Comments

7 Comments

  1. Pingback: Mizuno ST-Max 230 driver: High-MOI addition to the ST 230 lineup - Fly Pin High

  2. Pingback: Mizuno ST-Max 230 driver: High-MOI addition to the ST 230 lineup – GolfWRX

  3. Pingback: GolfWRX Spotted: Costco Kirkland Signature irons on USGA ... - GolfWRX - MidHandicap

  4. Pingback: TOUR REPORT: Rickie's new Odyssey putter (and its fascinating story) - Fly Pin High

  5. 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.

  6. Justin

    Jan 19, 2023 at 8:02 pm

    Maybe the best looking hybrid I’ve ever seen

  7. Tom K

    Jan 19, 2023 at 1:43 pm

    Drivers from the different manufacturers all have similar designs.

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Whats in the Bag

Jason Day WITB 2024 (February)

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Driver: Ping G430 LST (9 degrees @10)
Shaft: TPT prototype

3-wood: TaylorMade SIM Max (15 degrees)
Shaft: Mitsubishi Kuro Kage 80 X

7-wood: TaylorMade Stealth (21 degrees)
Shaft: Mitsubishi Kuro Kage 80 X

Irons: TaylorMade P760 (4-PW)
Shafts: True Temper Dynamic Gold X Seven

Wedges: Titleist Vokey Design SM10 (52-08F, 56-10S), WedgeWorks (60-08A+)
Shafts: KBS Tour C-Taper 125 S+ (52), True Temper Dynamic Gold Tour Issue S400 (56, 60)

Putter: TaylorMade Itsy Bitsy Spider Limited

Grips: Golf Pride Tour Velvet Cord

Ball: Bridgestone Tour B X (with Mindset)

More photos of Jason Day’s WITB in the forums.

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Whats in the Bag

Byeong Hun An WITB 2024 (February)

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Driver: Titleist TSR4 (9 degrees)
Shaft: Fujikura Motore X F1 6 X

Hybrids: Titleist TSR2 (18 degrees), Callaway Apex UW (19 degrees)
Shafts: Fujikura Ventus Blue 9 X

Irons: Titleist U505 (1), Titleist T200 (3), Titleist T150 (4, 5), Titleist 620 MB (6-9)
Shafts: MMT Utility Iron 105 TX (1, 3), Project X 6.5 (4-9)

Wedges: Titleist Vokey Design SM10 (48-10F, 52-08F, 56-08M, 60-04T)
Shafts: Project X 6.5 (48, 52), Project X 6.0 (56), Dynamic Gold S400 (60)

Putter: L.A.B. Golf Mezz.1 Max

Grips: Lamkin UTx

Ball: Titleist Pro V1x

 

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Tiger Woods to put 2024 Bridgestone Tour B X golf ball in play at Genesis

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While we’re waiting for a look at Tiger Woods’ full WITB, we can report Woods will have a new golf ball in play when he tees it up at this week’s Genesis Invitational.

More specifically, TW is switching into the the 2024 Bridgestone Tour B X golf ball. Last time we saw Woods in action, at the 2023 PNC Challenge, the 15-time major winner still had the previous generation of the Tour B X in play. Prior to 2022, Woods had played the company’s Tour B XS ball, owing to his preference for more spin, but after a launch monitor session at home revealed 10 yards of additional distance with the Tour B X.

“I am always seeking more distance off the tee and more control around the green, that’s the Holy Grail, and what Bridgestone’s delivered with the new Tour B X,” Woods said. “I tell people all the time how important it is to get ball fit, and if you’ve been fit, to get fit again. Bridgestone re-fit me into the new Tour B X, and it’s got a little more pop off the tee and the control I need around the greens.”

Bridgestone will launch Tiger Woods Edition Tour B golf balls on February 16. The ball is the exact same model Woods plays (which, per Bridgestone, is the retail Tour B X) and features ‘Tiger” on the side stamp.

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