Mizuno are back for 2023 with the replacement to their ST-Z 220 range. The new ST-230 line includes three drivers, a fairway wood and a hybrid.
Mizuno ST-230: Driver Technology
The biggest tech change is the introduction of a new Cortech chamber. This is a stainless steel weight with elastomeric TPU that sits in the golf club’s sole.
The addition of a cortech chamber helps performance in a variety of ways. Firstly, it allows the sole to flex, creating an additional source of energy behind the club face.

The TPU material also provides sound tuning and vibration dampening to help create a more solid feel at impact. The central stainless steel weight also helps reduce spin.
There are three Mizuno 2023 drivers, the Mizuno ST-Z, ST-X and ST-X PLTNM. Let’s take a look at the differences.
Mizuno ST-Z 230 Driver
This is the lowest-spinning model in the Mizuno ST-230 series. It is designed to have a neutral and stable ball flight.

- RELATED: Mizuno ST-Z 230 driver review
“Tour tests for the ST-Z 230 have all been very consistent,” says Chris Voshall, Mizuno’s Director of Product. “Firstly, an appreciation that the look is familiar at address, then satisfaction at how much better it feels off the face. Ball speeds are up on average 1-3mph with spin rates dropping around 200 rpm.”
















