Mizuno ST-Z 230 Golf Driver - Standard



An ultra-stable straight bias driver, crafted with a familiar look and character of the previous ST-Z. Upgraded with CORTECH Chamber technology to increase ball speed, reduce spin, and give a powerful, solid feel at impact!

Cortech Chamber

Explosive power! The slot design adds robust CORAREA, while dynamic TPU material optimizes sole flexure to reduce face stress. Plus, the sound-tuning/damping with the steel weight insert ensures an extra-solid feel for spin reduction.


More durable than 6-4 Ti, the Mizuno CORTECH Chamber powers a multi-thickness design that stands up to the hardest swings. UNIFIED SOLE COMPOSITE A single-piece carbon sole plate moves weight to outer limits for supreme stability.


Mass evenly distributed for an unstoppable, straight ball flight.


Lowered to the ground for increased low/mid spin and squared up for maximum accuracy.


4 degrees of adjustability.


Club Loft Range Lie
ST-Z 230 9.5° 7.5-11.5° 57.5-60.5°
ST-Z 230 10.5° 45" 45"
Dexterity: Right Hand
Loft: 9.5°
Shaft: Project X HZRDUS RDX Smoke Green 60G - 6.0
Dexterity: Right Hand
Loft: 9.5°
Shaft: Project X HZRDUS RDX Smoke Green 60G - 6.0

Product information


What happens if I can’t select the combination of head, shaft & grip I want?

Email us on hi@ninebyninegolf.com or call 020 3995 5638 we would be more than happy to discuss and prepare a custom quote.

I am purchasing from outside of the UK, what happens with TAX / Customs duty?

All orders show and charge TAX / Duties at checkout so there will be no additional payment required to the courier. Goods will be delivered duties paid (DDP)

Do you offer advice prior to purchase if I am unsure which product to choose?

We understand and recommend trying / having a fitting prior to any purchase but should this not be possible our team will be more than happy to help you through any purchase. Either via email or on the phone.

I paid for Express shipping on a custom order, why hasn't it shipped next day? 

Express shipping is the fastest possible shipping service, unfortunately it is not a way of getting your custom order built faster.

What if I can’t find an option I want on a drop-down menu?

If you can’t find a grip or shaft that you would like to order then please do reach out to us or place an order and leave a note on the order. One of our team will be happy to help you through the process. 

Nine by Nine Golf

Nine by Nine Golf is a supplier of high quality golf equipment. Golf is about performance and the brands we sell will help you achieve your highest performance on the course.

The Nine by Nine team has a long history with the game of golf as well as a deep knowledge and understanding of the technology and products on offer.

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