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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

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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Equipment

‘Engineered for extreme backspin’ – Mizuno unveils new S23 wedges

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Mizuno has today unveiled its new S23 wedges, which the manufacturer says are “comprehensively engineered for extreme backspin.”

The wedges are designed to combine the precision and playing profile of a player’s bladed wedge with the aggressive performance of a toe-weighted design and feature a centralized sweet spot for maximum control.

The S23 wedges showcase a shorter hosel and a heel-orientated cavity allowing greater mass to be pushed towards the toe. This creates a centred sweet spot, as opposed to a heel-side location in conventional wedges. 

The centred sweet spot is designed to contribute to longer impact time, less head deflection and higher spin from both full and partial shots.

“That check and spin you see from the pros isn’t purely because of newer grooves – most of us don’t have the consistency of strike to get that kind of action. For the vast majority, a centralised sweet spot makes it much easier to find and get that repetitive action.” – David Llewellyn, Director of R&D for Mizuno

The S23 wedges are One-piece Grain Flow Forged HD at Mizuno’s facility in Hiroshima, Japan – where Mizuno irons have been produced since 1968. They have a Tour-ready design with a player’s preferred, versatile look at address. But, with weight pushed to the toe, a partial heel cavity and a short hosel, they offer a centralised sweet spot designed to offer a more consistent strike and reliable high-spin numbers.

The wedges offer a loft-specific profile with stronger lofts featuring a tear-drop straight edge, flowing into a more rounded lob wedge, with grinds to suit throughout.

The precise grooves in the S23 wedges are quad-cut milled and loft specific, cut into Boron infused 1025 mild carbon steel for a longer effective lifespan. In addition, Mizuno’s HydroFlow Micro Grooves are laser etched to release moisture in a bid to reduce spin drop-off in wet conditions.

The S23 wedges come in either a white satin brush chrome or copper cobalt finish and will be in retail from February 2023 at a price of $160 per wedge.

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Titleist adds low-bounce T Grind to its Vokey Design SM9 family

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Titleist has today added the low-bounce T Grind to its Vokey Design SM9 lineup.

Previously available only as a WedgeWorks custom order, the T Grind will now be widely available in both stock and custom options as an extension to the existing SM9 family, being offered in SM9 58.04T and 60.04T models.

As a low-bounce wedge with a narrow crescent surface and wider back flange, the T grind is designed to allow for shot making under any condition. Compared to the L Grind, SM9’s other low-bounce option, the T Grind features a narrower forward sole and more aggressive heel, toe and trailing edge relief.

“Wedge play is an art, and the T Grind brings out the best in the artist. The leading edge stays low to the playing surface as the wedge is rotated, which allows the golfer to hit a variety of shots from tight lies. This is the wedge that really made Vokey Grinds an important part of our process – and is still a great option to this day.” – Bob Vokey

The new T Grind features a CG that has been raised vertically by adding weight to the topline design, where a tapered pad at the back of the toe helps align the CG properly without being visible from the playing position – promoting a more controlled ball flight and solid contact.

A new Spin Milled cutting process in the SM9 models – which includes tightening our allowable tolerances – produces consistently sharper grooves wedge after wedge in design for a higher, more consistent spin.

Specs, Availability & Pricing

  • Shaft: True Temper Dynamic Gold S200
  • Grip: Golf Pride Tour Velvet 360 White
  • Lofts, Bounce 58.04T RH/LH, 60.04T RH/LH
  • Color Codes: Tour Chrome, Brushed Steel, Jet Black finishes. Raw finish available for custom only.
  • Availability: March 10
  • Price: $179 (Steel), $195 (Graphite)
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Titleist introduces new Vokey Design SM9 lightweight options

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Titleist has just introduced their new Vokey Design SM9 Lightweight Options.

The Vokey Design SM9 wedges featuring lightweight steel and graphite shafts will be available beginning March 10, and aim to provide more in-store options for players with moderate swing speeds.

Plenty of golfers prefer lightweight shafts in their irons and this will give them the chance to have continuity throughout their bag and finding the right wedge to improve their wedge play.

“Every golfer has a unique swing and requires a unique wedge. Finding the right option for your swing type can allow you to hit any kind of wedge shot, in all conditions. Playing the right shaft can make a massive difference in performance.” – Master Craftsman Bob Vokey

Featured shafts for Vokey SM9 Lightweight include KBS Tour Lite 95 (wedge) and Tensei AM2 Red (regular, ladies). KBS Tour Lite is a lightweight steel shaft designed for players seeking additional spin and precision control in their wedge game, while Tensei AM2 Red is a graphite, high-launching shaft for players looking for more control from their scoring clubs.

Advanced Personalization and Custom Options: Vokey Design SM9 wedges feature a modern, clean look, which provides a canvas for customization. The WedgeWorks custom options include:

  • Six unique toe engravings
  • Stamping options | 10-character Straight/Freestyle stamping; 15 characters around the toe; and two lines of 10 characters each
  • Custom paint-filled | Loft, Bounce and Grind markings and BV Wings logo
  • SM9 wedges can also be custom ordered with an industry-leading selection of shafts, grips, shaft bands and ferrules.

Featured Shafts and Grips

  • Shafts: Lightweight Steel | KBS Tour Lite (wedge). Graphite | Tensei AM2 Red (Regular and Ladies)
  • Grip: Golf Pride Tour Velvet 360 White | Ladies: Golf Pride Tour Velvet 360 White Flat Cap U58R

Lofts, Finishes, Bounce: 

Available in three finishes – Tour Chrome, Brushed Steel, Jet Black

  • KBS Tour Lite 95 (Wedge): 50.08F | 52.08F |54.10S | 56.08M | 56.10S | 56.12D | 58.14K | 60.12D
  • Tensei AM2 Red (Regular): 50.08F | 52.08F |54.10S | 56.10S | 58.14K | 60.12D
  • Tensei AM2 Red (Ladies): 52.08F | 54.10S | 56.10S | 58.14K | 60.12D

Availability & Pricing: 

Vokey Design SM9 Lightweight wedges will be available globally beginning March 10. $179 (Steel), $195 (Graphite).

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