These days Mizuno is launching the new Mizuno JPX 921 irons, the ES21 wedges, and the JPX FLI-HI range of hybrids (to replace less predictable long and mid-irons).
I am particularly curious about the new Mizuno JPX 921 irons. In a previous post about Mizuno MP-20 HMB irons, I have already explained to you the benefits of Chromoly steel. So if you don’t mind here I will not repeat myself.
The new family comprises
- JPX921 Forged, integrating the power of Chromoly into a full-body Forged iron for the very first time,
- JPX921 Tour,
- JPX921 Hot Metal, and
- Hot Metal Pro, with each model, engineered to help enhance performance for particular swing types.
The following table will explain to you the differences and changes versus the previous Mizuno JPX 919 irons.
The JPX921 Forged offers the fastest ball speeds Mizuno has ever produced from a fully Forged iron.
The JPX921 Hot Metal and Hot Metal Pro represent the 3rd generation of Mizuno irons to be crafted from high-strength Chromoly 4140M.
Mizuno JPX 921 forged irons
The JPX921 Forged iron integrates the power of Chromoly into a full-body Forged iron for the very first time.
The integration of Chromoly 4120 allows for a clubface up to 0.5mm thinner which delivers the fastest ball speeds Mizuno has ever produced from a full-body Forged iron.
Additional perimeter weighting with toe bias creates a Stability Frame to maximize results from off-center strikes, while a 6.4% wider CNC back milled slot further increases stability.
Availability & pricing
- 4-GW RH, 6-GW LH – Combines with JPX921 Forged in SEL
- RRP: JPX921 Forged £150 / €195 / SEK 1,899 per iron
Mizuno JPX 921 Tour irons
The most chosen Mizuno model on the Tour among non-contracted professionals – the JPX900 Tour and JPX919 Tour were both played to win Major championships.
You will find Grain Flow Forged HD for the better feel in the Mizuno JPX 921 Tour irons just like in the Forged model.
The shorter irons feature a narrower sole for improved turf interaction while a thicker cavity pad throughout the set, evolving from Mizuno’s study of vibration patterns, produces a harmonic impact that can be felt for a fraction longer.
Availability & pricing
- JPX921 Tour £150 / €195 / SEK 1,899 per iron
- 4-GW RH, 6-GW LH – Combines with JPX 921 Forged in SEL
Mizuno JPX 921 Hot Metal irons / Chromoly 4140M
The JPX921 Hot Metal irons (see picture above) deliver Mizuno’s fastest ever ball speeds, a piercingly straight ball flight together with controllable landing angles.
The JPX921 Hot Metal represents the 3rd generation of Mizuno irons to utilize the resilience of Chromoly – R&D generally accepts that any new technology needs three generations to reach near-optimal performance.
The JPX921 features Mizuno’s most complex face geometry to date, to produce additional energy from the clubface; the Hot Metal Pro version offering a more compact profile with reduced offset.
The use of Chromoly 4140M and a re-engineered CORTECH face, now 0.2mm thinner across the center point, creates exceptional ball speeds.
These are further enhanced by the Seamless Cup Face featuring a variable thickness sole design that allows the leading edge to act as a hinge, generating greater flex.
Availability & pricing
- 4-GW / RH & LH
- JPX21 Hot Metal £120 / €155 / SEK 1,449 per iron
