Vendor:Mizuno
Mizuno ST-Z 230 Driver
Fast, low-spin and straight. Made in Japan. The ST-Z 230 is Mizuno's straight-flying driver: high ball speed and low spin in a neutral, stable head built for golfers who want to swing hard without fearing the left side. Fitted with Japan-spec shafts and grip.
Why golfers love it
- CORTECH Chamber: a stainless-steel core molded into a TPU insert in the sole transfers impact energy back into the ball, boosting ball speed and widening the fast zone of the face.
- Forged Beta titanium face (2041Ti): about 17% stronger and 8% more flexible than standard 6Al-4V titanium. The variable-thickness CORTECH face keeps speed high even on off-center hits.
- Built to fly straight: a 14 g weight sits at the rear center, and carbon crown and sole panels push mass low and deep for a high-MOI, stable head. The "Z" stands for straight; its sibling, the ST-X, is the draw-bias model.
- Adjustable loft: 9.5° head adjusts ±2° (7.5° to 11.5°) with the included wrench.
- Premium Japanese build: head made in Japan, finished in Black IP with mirror and shot-blast detailing.
Specifications
| Loft | 9.5° (adjustable 7.5°–11.5°) |
|---|---|
| Lie | 57.5° |
| Head volume | 460 cc |
| Length | 45.5" |
| Shaft options | Diamana MM D (S, 62 g, torque 4.7, mid kick) – balance D4, approx. 309 g Tour AD GM D (S) – balance D3, approx. 299 g |
| Grip | Iomic Sticky 1.8, black (Mizuno original), M60, 44 g |
| Head materials | Body: Ti811 titanium (precision cast) Face: 2041Ti beta titanium (forged) Crown & sole: carbon CORTECH Chamber: stainless steel (SUS316) + TPU Weight: stainless steel (SUS304) |
| Finish | Black IP, mirror & shot |
| In the box | Driver, adjustment wrench, head cover |
| Origin | Made in Japan (head cover made in China) |
Mizuno ST-Z 230 Driver
Shaft: Diamana MM D (S) – 9.5°
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