Connect with us


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



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


  • 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



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


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)


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


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

Your Reaction?
  • 69
  • LEGIT12
  • WOW13
  • LOL2
  • IDHT0
  • FLOP2
  • OB1
  • SHANK1

GolfWRX Editor-in-Chief



  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.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Whats in the Bag

Sam Burns WITB 2024 (April)



  • Sam Burns’ what’s in the bag accurate as of the RBC Heritage.

Driver: Callaway Paradym Triple Diamond S (9 degrees @10)
Shaft: Fujikura Ventus Blue 7 TX

3-wood: Callaway Paradym Ai Smoke Triple Diamond T (15 degrees @16)
Shaft: Fujikura Ventus Blue 8 X

Hybrid: Callaway Apex UW (21 degrees)
Shaft: Fujikura Ventus Blue 8 X

Irons: Callaway Apex TCB ’24 (4-AW)
Shafts: Project X 6.5 (4-PW), True Temper Dynamic Gold X100 Tour Issue (AW)

Wedges: Titleist Vokey Design SM10 (56-14F @55), WedgeWorks Proto (60-T)
Shafts: True Temper Dynamic Gold S400 Tour Issue (56, 60)

Putter: Odyssey Ai-One #7S

Grips: Golf Pride Tour Velvet Align

Ball: Callaway Chrome Tour X

Check out more in-hand photos of Sam Burns’ WITB in the forums.


Your Reaction?
  • 1
  • LEGIT0
  • WOW0
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK0

Continue Reading

Whats in the Bag

Will Zalatoris WITB 2024 (April)



  • Will Zalatoris’ what’s in the bag accurate as of the RBC Heritage. 

Driver: Titleist TSR2 (9 degrees, A1 SureFit setting)
Shaft: Fujikura Ventus TR Black 7 X (44.5 inches)

3-wood: Titleist TSi2 (15 degrees, A1 SureFit setting)
Shaft: Fujikura Ventus TR Blue 8 X

Irons: Titleist T350 (3), Titleist T150 (4-PW)
Shafts: Nippon N.S. Pro Prototype G.O.S.T. 10 ST X (3), True Temper Dynamic Gold Tour Issue X100 (4-PW)

Wedges: Titleist Vokey Design SM10 (50-08F, 54-10S @55, 60-04T)
Shafts: True Temper Dynamic Gold Tour Issue X100

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

Grips: Golf Pride Z-Grip Cord

See more photos of Will Zalatoris’ WITB in the forums.

Your Reaction?
  • 1
  • LEGIT0
  • WOW0
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK0

Continue Reading


New Level launches new 480-DB irons, blending performance and forgiveness



New Level has been making some really good golf equipment since the company started up in 2018. Offering irons that are more geared towards the better player, precision has been a fundamental philosophy for New Level in creating irons and wedges.

The 480 line of irons has been the flagship of the brand, and the newest member of that team is the 480-DB iron that is now open to pre-orders. A new cavity design is what the whole 480 line is about, and the 480-DB takes advantage of that with added ball speed and a larger sweet spot.

For players who require their irons to offer the best feel, rest assured the DB is a fully forged (from 1020 carbon steel) one-piece golf club. No multi-piece, hollow design with this iron.

While the 480-DB is the next generation of the popular 902-OS, New Level didn’t follow the current trend in golf by chasing distance with the new iron. They actually weakened the lofts on the 480-DB with the spec sheet showing a 33-degree 7-iron and 45-degree pitching wedge. These lofts allow the DB to have less offset while still offering consistent distance off the face.

A traditional design was also at the forefront of the new irons to make sure that golfers with an eye for detail can look down at them with confidence that they will perform under any condition.


A weight low in the back cavity will allow their master club builders to dial in the perfect weight for the golfer, no matter the length or shaft being used. New Level believes that the new 480-DB is one of the most forgiving one-piece forged irons on the market today. A pre-worn leading edge on the sole should get through the turf quickly and with reduced digging for better turf interaction.

You can pre-order the New Level 480-DB right now on the New Level website.

Pricing specs availability

  • Irons: 4-PW
  • Price: $149/oron
  • Availability: Pre-order

Your Reaction?
  • 18
  • LEGIT3
  • WOW2
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK0

Continue Reading