Mizuno ST-Z 240 Driver

Loft Options & Stock Shafts

Technology

Tour Driver

The ST-Z 240 is Mizuno's most aggressive tour driver, a 440cc head built for players who want to work the ball rather than keep it straight. Most modern drivers are engineered around forgiveness first. This one is not. Mizuno made it for golfers who want feedback and shot-shaping ability, and they accept that a mishit won't be quietly corrected.

The Z in ST-Z is about spin reduction, specifically zeroing it out. The compact head geometry pushes the CG forward and low, which flattens launch angle and cuts backspin. For a player with real clubhead speed, that means more roll and longer drives when contact is solid. It's a design philosophy that rewards precision over margin.

Adjustability rounds out the package. The hosel gives you roughly 1.5 degrees of loft in either direction, plus face angle changes to dial in shot bias. That matters at a competitive level where conditions vary and a player needs to fine-tune without pulling a different club out of the bag.

• Single-digit handicap players who shape shots intentionally and want a driver that responds accurately to swing changes rather than dampening them.
• High clubhead speed players, think 110 mph and above, whose current driver spins the ball too high and costs them distance on well-struck shots.
• Competitive golfers who work the ball off the tee and need a compact head that won't fight their natural shot shape.

Frequently Asked Questions

How does the Mizuno ST-Z 240 compare to the ST-Z 220?

The 240 is the smaller head at 440cc versus 460cc, so it trades some forgiveness for more shot-shaping response. If you hit it in the middle consistently, the 240 will reward you. If you want the same low-spin profile with a bit more margin on misses, the 220 is the more practical choice.

What shaft should I use in the Mizuno ST-Z 240?

Mizuno offers it with a range of quality aftermarket options in stiff, X, and TX flex depending on the build. The target player is generating serious speed, and under-flexing the shaft in a low-spin head will cost distance. Most fitters start at stiff or extra stiff and dial from there based on launch data.

Is the ST-Z 240 a good driver for higher handicap golfers?

No. The compact head and low-spin tuning punish off-center hits harder than a standard 460cc driver. A player with mid-range ball speed and inconsistent contact will likely hit it shorter and less straight than something with more built-in forgiveness. This club was designed for better players.

How much loft adjustment does the ST-Z 240 have?

The adjustable hosel covers approximately plus or minus 1.5 degrees from the base loft setting. Available base lofts are typically 8, 9.5, and 10.5 degrees. You can also use the hosel to shift face angle, which changes shot bias without altering loft.

Why does the ST-Z 240 produce less spin than most drivers?

The compact head moves the CG forward compared to larger 460cc heads, and that forward position reduces backspin at impact. The shallow face depth contributes as well. No exotic insert is doing the work here. It's the shape of the head, and it means players who generate their own spin through swing mechanics get a more honest read on the result.