A topic of discussion in the GolfWRX forums for months, Mizuno has announced the successor to the 22 series, its new Mizuno Pro 241, Mizuno Pro 243, Mizuno Pro 245, and Mizuno Pro Fli-Hi irons.

The continuation of the longstanding partnership between Mizuno engineers and the Hiroshima, Japan, Grain Flow Forging plant has produced what Mizuno calls “a revolutionary leap in golf club design.”

David Llewellyn, Director of R&D at Mizuno, spoke to this, “Other manufacturers have widely adopted Mizuno’s work to elevate the performance of elite player’s irons. What now sets Mizuno apart is the ability to apply precise manufacturing techniques learned at our long-standing forging plant in Hiroshima, Japan, to increasingly complex designs.”

Discussing the line, Chris Voshall, Product Director at Mizuno added, “Each model has become better at its specific job, more distinct, yet able to be blended when required.”

Mizuno Pro 241

Grain Flow Forged HD in Hiroshima, Japan (like all the 24 irons), Mizuno Pro 241 irons feature better turf interaction than their predecessors thanks to increased bounce (while maintaining the same sole camber). Additionally, the 241 irons feature more centered mass than Mizuno Pro 221 for enhanced feedback. Also contributing to enhanced feedback: Mizuno’s signature soft copper underlay (again, present in all 24 irons). The top line has been thinned and short irons are more compact.

Mizuno says (David Llewellyn): “With a muscle-back, the gains are in the details. The key to a visually appealing top-line might be a fraction of a millimeter, which can be lost or created in manufacturing. Working hand in hand with our forging plant for so many years allowed us to be incredibly precise in the engineering and craftsman’s stages of the Mizuno Pro 241.”

Finish: Full Satin Brush
Stock shaft: KBS Tour
Stock grip: Golf Pride MCC Teams Black/Gray
Set configuration: 3-PW, RH and 4-PW/LH

Mizuno Pro 243

4- through 7-irons are Grain Glow Forged HD from a single billet of 4120 Chromoly steel, while 8-GW are forged from 1024 Elite Mild Carbon steel. 4 through 7 irons feature a Flow Microslot for faster ball speeds and increased launch (thanks to more rebound area. The soles of the 243 irons are equipped with a Wrap Around Sole Grind for better turf interaction as well as increased bounce angle. The Soft Copper Underlay is again present as is the Full Satin Brush finish.

Mizuno says (Chris Voshall): “The Mizuno Pro 243 looks much more compact than its predecessor, even though the performance has stepped up. The long and mid irons are flying far enough that we’ve had to modernize the lofts in the scoring irons. Mizuno Pro isn’t stuck in tradition – we’re led by performance above what might be expected historically.”

Stock shaft: Nippon Modus3 115
Stock grip: Golf Pride MCC Teams Black/Gray
Set configuration: Available 4-GW, RH only

Mizuno Pro 245

Pro 245 2- through 8-irons — which are crafted from Gain Flow Forged 4135 Chromoly — feature Hollow Body COR construction for higher COR, higher MOI, and solid feel.

Mizuno is also keen to highlight the soft muscle-back feel produced by its Harmonic Impact Technology and the substantial amount of tungsten (47 grams) in the long and mid-irons for ease of launch. Engineers achieved lowest possible placement without contacting the sole for lower and deeper CG via Suspended Tungsten placement

Mizuno says (Chris Voshall): “There are some impressive ball speed gains in the Mizuno Pro 245, considering we’ve slimmed it down – especially in the longer irons. The biggest challenge for people now is telling this iron apart from the one-piece Mizuno Pro 241 muscle-back.”

Finish: Full Satin Brush
Stock shaft: True Temper Dynamic Gold Mid 115, 100
Stock grip: Golf Pride MCC Teams Black/Gray
Set configuration: 2-GW, RH and 4-GW, LH

Mizuno Pro Fli-Hi

Crafting the Fli-Hi from 4335 Hollow Body Construction heat-treated 4335 Nickel Chromoloy allowed Mizuno engineers to incorporate a faster multi-thickness face and off-set face weld

Internal tungsten weighting assists with ease of launch, and once again, attention has been paid to the sole of the club where increased bounce angle aids turf interaction.

Also notable: An offset face weld for greater shot shape adjustability.

Mizuno says (Chris Voshall): “The Fli-Hi has become a fixture on tour – not just with Mizuno’s contracted players. The new version is a little slimmer but does everything the original did, just better. It flights a little higher and goes further. All obvious improvements – just difficult to make.”

Finish: Black Ion
Stock shaft: Project X U 110 6.0, SteelFiber HLS 880 F4
Stock grip: Golf Pride MCC Teams Black/Grey
Set configuration: Available 2, 3, 4-iron, RH and LH

Pricing, availability

Pre-sale begins: January 8
At retail: January 25