Equipment
Mizuno JPX-900 Hot Metal and JPX-900 Forged irons
Along with the company’s new JPX-900 Tour irons, Mizuno will also launch its new JPX-900 Hot Metal and JPX-900 Forged irons, which will replace the JPX-850 and JPX-850 Forged irons.
Unlike Mizuno’s MP irons, which are blade and blade-like irons designed for better players, the JPX line of irons are designed to offer golfers more forgiveness and distance, packaged into slightly larger head sizes. Think of them as “tweener irons,” according to David Llewellyn, Mizuno’s Director of R&D.
As is expected from the JPX line, the new crop of JPX-900 Forged and Hot Metal irons focuses on playability and distance, but doesn’t ignore feel and sound in the design process. To accomplish the feat, each of the new offerings use special materials. The JPX-900 Forged irons are made with a special 1025E Grain Flow Forged steel that is infused with boron. The JPX-900 Hot Metal irons are cast from a metal called Chromoly 4140M, which you can learn more about below.
JPX-900 Forged irons
Along with being larger than Mizuno’s new JPX-900 Tour irons, the JPX-900 Forged irons have a chemical trick up their sleeves to offer greater forgiveness and more distance — a material called boron.
The company began using boron with its JPX-850 Forged irons, although two years after their release there is still lingering confusion among golfers as to how and why boron is actually used. Contrary to popular belief, boron is not used as a replacement for traditional steel in the design. Rather, a small amount of boron (30 parts per million, according to Mizuno) is mixed with the company’s Grain Flow Flowed 1025E steel to increase strength. This allows Mizuno to forge the faces of boron-infused thinner, leading to faster ball speeds without sacrificing durability.
Mizuno started experimenting with boron after seeing its success in the auto industry, where the material helped create auto parts with a higher strength-to-weight ratio to make stronger, more more fuel-efficient structures. Mizuno found that it translated well into iron making, helping them offer better distance and consistency. The difficult part about using boron, according to Llewelyn, was getting the mixture right so that the company’s irons would maintain their signature sound and feel.
“It took 5 years to figure out how to do it,” Llewelyn said.
The JPX-900 Forged irons, therefore, are the second-generation of JPX irons to use boron. To make the irons longer and more forgiving than their predecessors, Mizuno reshaped the pocket cavity of the irons to create a larger rebound area, giving them faster ball speeds on off-center hits.
Head sizing throughout the set has also changed; the longer irons have a longer blade length, while the shorter irons have a more compact look, with the “crossover” being at the 6-iron.

The JPX-900 Forged ($1200) come stock with True Temper’s Project X LZ shaft, and will hit stores Sept. 16.
JPX-900 Hot Metal irons
In the new age of iron design, companies search for ways to make the faces thinner in order to produce faster, more consistent ball speeds. That’s how Mizuno stumbled upon 4140M Chromoly, a common scientific name for the mixture of chromium and molybdenum. Mizuno found that the material, which is used in aircraft tubing, firearm parts, bicycle frames and race car roll cages, had a two-fold benefit in iron design.
The way Mizuno heat treats the Chromoly allows the irons to be built with thinner and stronger faces, while still maintaining their bendable, loft-and-lie adjustable hosels. If you’ve equipment articles on GolfWRX in the past few years, we’re quite keen on the benefits of custom-fitting when making a club purchase, so this puts a smile on our face.
The Hot Metal irons also have a “cup face,” which makes the faces thinner and more flexible. What’s unique about Mizuno’s cup-face design is that it is created without the usual face weld. That works to raise coefficient of restitution (COR) to 0.828, according to Mizuno, just shy of the USGA’s legal limit.
The JPX-900 irons are also equipped with a triple-cut sole for better turf interaction from a variety of lies and “sound ribs” behind the top cavity for improved acoustics. The ribs are similar to what are used in metal woods, where they quiet the vibrations to improve the feel of the hollow, thin-faced clubs.
For golfers who prefer to purchase wedges that match their irons, Mizuno redesigned the JPX-900 Hot Metal wedges to maximize performance around their greens. The set’s gap, sand and lob wedges are made from X30 Stainless Steel — a soft and bendable material, according to Mizuno — with head shapes that are inspired by the company’s S5 wedges. Like Mizuno’s premium S5 and T7 wedges, the Hot metal uses the company’s Quad-Cut grooves for improve spin control, and the sole grinds are progressively shaped to suit the respective purposes of each loft.
Related: Click to See photos of Mizuno’s new wedges
JPX-900 Hot Metal sets (4-PW, GW) will come stock with Nippon N.S. Pro Modus3 Tour 105 steel shafts, and will hit stores on Sept. 16 for $900.
Related: See what GolfWRX members are saying about the clubs in our forums
Equipment
Why Rickie Fowler is switching to a shorter driver at the PGA Championship
In a golf world where players are looking to eke out every yard possible, usually by lengthening their drivers to add clubhead speed, there’s one player at the PGA Championship who’s going in the opposite direction. In fact, for Rickie Fowler, his goal off the tee is not about gaining extra distance or yards north to south, but rather about shrinking the misses from east to west.
Ahead of the PGA Championship and the week prior at the Truist Championship. Fowler mentioned to Cobra Tour Rep Ben Schomin that the driver didn’t quite swing feel the same as everything in the bag. As a result, and with Schomin’s suggestion to try and sync everything up with the big stick, Fowler decided to test out a shorter length shaft.
“He’s been at 45 (inches), and he’d been at 45 for a few weeks, 44 1/8 (inches) is really is where he is been living really for the most part, for the last couple of years, and is where he is been comfortable,” Schomin told GolfWRX. “It just felt like it was a little long and loose on him.”
Interestingly, Fowler ranks 40th in Driving Accuracy this year on the PGA Tour. It’s his most accurate season with the driver since the start of the decade. But sometimes for players, feel is more important than statistics.
“It was really more of a trying to get the swing to feel the fluidness from club to club to club to try to get it to feel the same,” Schomin added. “And so we took it down to 43 and a quarter, and it was a touch of a ball speed loss, just based on that overall club head speed. But honestly, he squared it up probably a little better. The right miss wasn’t nearly as far. So really, overall down-range dispersion tightened up a fair amount, and he felt confident in swinging it.”
The change in length had Fowler’s caddie, Ricky Romano, beaming at how well he had driven during Tuesday’s practice round at Aronimink. So much so, he was asking Schomin not to suggest changes anymore.
Fowler’s shaft-shortening is one of a few driver adjustments he’s made this season, and to Schomin’s credit, it’s thanks to the fact that he and the rest of the Cobra team had Fowler fit very well into three of the four heads in the Cobra OPTM lineup.
“He had three distinct drivers and the biggest decision was trying to decide which worked best at that time,” Schomin told GolfWRX previously. “He’s played the majority of the season with OPTM X, but has also played a couple of tournaments with OPTM LS. His overall driving stats have been good.”
At the RBC Heritage earlier this spring, Fowler switched drivers, changing from his Cobra OPTM X and into the Tour, low-loft Max K model that Gary Woodland used to win just a few weeks prior.
Now for the PGA Championship, Fowler’s back in the X head, but still using the UST Mamiya LIN-Q PowerCore White 6TX shaft, just a little bit shorter.
“Will he stay there? I’m not sure,” Schomin added. “Could we end up say at like 43 and 7.5 (of an inch). If it’s giving him the same feel of consistency through the bag, then I think we might end up just a touch longer. But if he likes where he is at, he’s confident where he is at, that’s really all that matters.”
If there’s more testing, though, just don’t tell his caddie.
Equipment
GolfWRX Launch Report: 2026 Titleist GTS drivers
What you need to know: As is customary for the Fairhaven-based company, Titleist officially announced today that its GTS drivers are headed to retail, following a successful tour release. The GTS2, GTS3, and GTS4 drivers will be available in golf shops June 11.
Since debuting at the Texas Children’s Houston Open, the new GTS lineup has quickly gained traction on the PGA Tour, with more than 50 players already making the switch to a GTS2, GTS3, or GTS4 driver. Among them are Justin Thomas and Jordan Spieth.

Justin Thomas’ Titleist GTS2 driver (Greg Moore, GolfWRX)
According to Titleist, the GTS series builds upon the performance foundation established by the GT Series, while introducing several major technological advancements, including a new Split Mass Frame construction, refined aerodynamics, and an updated Speed Sync face design.

2026 Titleist GTS drivers: What’s new, key technology
Split Mass Frame and thermoform body
At the center of the new GTS lineup is a redesigned internal structure: the Split Mass Frame. This technology works with a full-thermoform body made from Titleist’s Proprietary Matrix Polymer (PMP), a lightweight composite that enables engineers to reposition mass more efficiently throughout the head. Compared to the previous GT generation, GTS drivers feature nearly double the PMP material, increasing from 13 grams to 26 grams, while maintaining the sound and feel preferred by better players.
The weight savings from the thermoform construction allowed Titleist engineers to strategically separate mass placement inside the head. Specifically, more weight is pushed rearward to improve stability and forgiveness, while additional mass is positioned low and forward to optimize speed, launch, and spin.
In short, golfers are able to maintain ball speed and consistency across both centered and off-center strikes.

Faster aerodynamics
Titleist also refined the aerodynamic shaping of the GTS heads to help players generate more clubhead speed.
The tails of the new GTS2 and GTS3 heads have been raised compared to previous models, helping airflow stay attached to the crown and sole longer during the swing. According to Titleist, the improved airflow reduces drag and increases speed without affecting launch conditions or center of gravity placement.
Typically, aerodynamic gains can compromise forgiveness or launch characteristics, but the weight savings from the Split Mass Frame allowed engineers to preserve preferred CG locations.

New Speed Sync face
The new Speed Sync Face design is engineered to improve ball speed retention across a larger portion of the face. A reinforced perimeter structure helps maximize face deflection and COR on centered strikes, while the upper portion of the support ring is opened up to increase speed on high-face impacts, a common strike location for many golfers. The face also features a variable thickness design to preserve speed and performance across a wider impact area.
Expanded adjustability
Each GTS model includes a dual-weighting system to fine-tune launch, spin, and shot shape more precisely than previous generations. GTS2 uses interchangeable forward and aft weights, while GTS3 and GTS4 combine a rear weight with an adjustable forward track weight system.
Tour-inspired face graphics
The new lineup features redesigned high-contrast face graphics to improve alignment and framing at address, according to Titleist. Sharp visual lines are designed to make it easier to center the golf ball and to perceive loft more easily at setup.

Additional model details
GTS2

- The GTS2 is the most forgiving model, designed for golfers seeking maximum stability and consistent speed across the face.
- It produces high launch with mid spin and features a larger, confidence-inspiring profile behind the ball.
- Standard weighting includes an 11-gram forward weight and a 5-gram rear weight, with additional fitting configurations available.
GTS3

- The GTS3 is aimed at players who want more control over launch, spin, and shot shaping.
- Compared to GTS2, the GTS3 offers lower launch and spin while featuring a more compact profile and deeper face design preferred by many stronger players.
- The head features an adjustable forward-track weight system to further fine-tune center of gravity placement.
GTS4

- The lowest-spinning option in the lineup, GTS4 is built for golfers looking to reduce excessive spin and maximize total distance.
- Unlike previous “4” models from Titleist, the new GTS4 features a full 460cc profile that improves forgiveness and stability while retaining its low-spin DNA.
- Like GTS3, it includes a forward track weighting system for precise fitting adjustments.

What Titleist says
“When we talk about driver design, it’s never about the one feature or benefit — it’s about all of them,” said Stephanie Luttrell, Titleist’s Senior Director of Metalwood R&D. “Ball speed, forgiveness, spin stability, adjustability, exceptional sound and feel… these are all attributes that golfers care about. It’s our job to design a lineup that elevates performance across the board without sacrificing in key areas, and we feel we’ve done that with GTS.”
“We know that forward CGs drive speed with great launch and spin characteristics, but you need to be able to do that with an inertial stability that still preserves ball speed, launch and spin consistency on off-center hits,” Luttrell said. “We’ve never before been able to hit these CG positions and inertia properties at the same time, and we’re achieving that because of GTS’ construction.”
Club Junkie’s take
I feel like every time there is a new Titleist wood release, I figure they can’t outdo their previous driver. And every year, I am wrong and impressed with the performance. The GTS fits right into that narrative again, as I didn’t know where Titleist could go from GT, but they pushed the limits again, and my fitting proved the smart people there found ways to improve.
My past four Titleist drivers have been a 2 series as my swing typically requires a little height, spin, and forgiveness so I figured I would just get a new GTS2 and be on my way. During the fitting, I was impressed by the new GTS construction, its added PMP material, and the advanced adjustability on each model. My fitter, Joey, got to work putting together a GTS2 and we started there. The launch and spin were great, and the consistency on misses was very tight. My average ball speed with the GTS went up a little bit as the new Speed Sync face creates more speed away from the center.
Joey then built up a GTS3 in 11 degrees, but I figured this wouldn’t have the stability I needed for tight dispersion on my miss hits. That thought was quickly erased after a few shots, and I really liked the more center start line and reduced draw on the misses I was seeing. We tried a few different settings and shafts to dial in the details in order to get the best fit. Having a forward and rear weight in the head allowed Joey to set up the GTS3 with a heavier rear weight to keep the launch and spin up, while the Sure Fit hosel set flat created a more center start line for me. My misses were not nearly as far left, and I was really impressed with the consistency on the spin and launch when I didn’t hit it in the center.
Titleist again created a wood line in GTS that delivers improvements over previous drivers while keeping the traditional look and feel you expect. More adjustability, better off-center speed, and 3 drivers that are playable over a wider range of players should make these extremely successful in fittings.
Pricing, specs, availability
GTS2 lofts: 8, 9, 10, 11 degrees (RH/LH)
GTS3 lofts: 8, 9, 10, 11 degrees (RH/LH)
GTS4 lofts: 8, 9, 10 (RH/LH)
Featured shafts
- Project X Titan Black
- Mitsubishi Tensei 1K White
- Mitsubishi Tensei 1K Blue
- Mitsubishi Tensei 1K Red
Premium shafts
- Graphite Design Tour AD DI
- Graphite Design Tour AD VF
- Graphite Design Tour AD FI
Available for fittings and pre-sale now.
In golf shops worldwide beginning June 11.
Price: $699 (standard), $899 (premium)
Equipment
Titleist launches new GTS2 and GTS3 fairways
Titleist has today introduced its new GTS2 and GTS3 fairways.
Lower and deeper center of gravity (CG) positions, new adjustable heel-toe weights and advanced clubface innovations drive total performance in the two tour-proven models.
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RAT
Sep 15, 2016 at 8:10 pm
I LIKE THE LOOKS AND WOULD CONSIDER BUYING THEM . BUT THE PRICE IS TOO HIGH !! THAT’S THE PROBLEM WITH GOLF IT’S NOT REASONABLE PRICED !! THE FEWER THAT PLAY, THE COST GOES UP.THAT’S NOT THE WAY TO BRING IN NEW GOLFERS. DROP THE PRICE OF EQUIPMENT ,PLEASE,PLEASE… YOU WILL SEE MORE GETTING INTO GOLF. IT COST TOO MUCH!!!!!
Dutzow
Aug 30, 2016 at 2:05 am
Have the callway x2hots which I really enjoy. I don’t love the look however, and most of their recent offerings have looked even worse. Really enjoy the look of these though! Glad someone made an iron that wasn’t obnoxious!!
Bert
Aug 19, 2016 at 7:49 pm
Development may create costs but excessive cost create loss of sales. The industry needs a better price point. I just passed on Callaway Apex irons, yes like I them, but just can’t justify the extra cost for a “distance” change.
mr b
Aug 18, 2016 at 12:09 pm
did someone from mizuno beat your a$$ or something? you sure do have an inferiority complex for them
mr b
Aug 18, 2016 at 4:16 pm
same here. inferiority complex it is.
5kywalker
Aug 19, 2016 at 1:46 am
Smizzle, you seem to be the only one here with such a harsh view on these clubs. In essence, you just sound mental.
So please pipe down whilst the adults talk.
There’s a good lad.
Brian
Aug 17, 2016 at 1:53 pm
You have to be the least capable internet troll I’ve ever run across.
Mark Walgren
Aug 22, 2016 at 2:07 am
Oh come on. A very bold statement such as your original comment is bait. Explain yourself. Why do you say they steal so much?
Nolanski
Aug 22, 2016 at 12:31 pm
He’s been trolling hard for awhile now. Its best to just ignore him.
James Bond
Aug 17, 2016 at 9:17 am
Just stop.
Pub
Aug 17, 2016 at 10:38 pm
He was talking to you, varmint
Uncle Buck
Aug 17, 2016 at 4:24 am
Chromoly?? In the 70’s I had a bmx bike frame made of that! Next we’ll be wearing Angels Flight golf clothing and platform Farmalari’s!!
Pub
Aug 17, 2016 at 3:20 am
You didn’t. Nobody cares what you say, you’re just a pathetic varmint
KK
Aug 16, 2016 at 11:21 pm
Seems like great tech but I’m not sure anyone can match what Titleist has done with AP2, T-Mb and C16.
Leon
Aug 16, 2016 at 7:24 pm
Nothing particular innovative here. Just appearance change and minor tuning. The JPX 800 and 850 are all have 0.83 COR already, so no distance increase at all.
The only good part is the stock Project LZ shafts, which are better shafts than the crap DG S300, but they add the up charge into the total price. $1200 for a new set? Give me a break (it was $799, then $899, then $999, and now we have $1200, good for everybody)
Tom
Aug 16, 2016 at 11:23 pm
“Mizuno started experimenting with boron after seeing its success in the auto industry, where the material helped create auto parts with a higher strength-to-weight ratio to make stronger, more more fuel-efficient structures. Mizuno found that it translated well into iron making, helping them offer better distance and consistency. The difficult part about using boron, according to Llewelyn, was getting the mixture right so that the company’s irons would maintain their signature sound and feel.” That type of research and technology cost’s money.
Leon
Aug 17, 2016 at 10:55 am
The “boron” thing is more like minor tuning. The JPX 800 and later 850 (not pro version) cast steel iron have all reached the 0.83 COR upper limit with “ultra thin face”. The boron may make the face thinner but the elasticity is constrained to the 0.83 limit, so whether the face is thinner or thicker, as long as the COR is 0.83, the overall distance will be pretty much the same, no matter what materials they are using.
I like Mizuno’s club and am playing the MP 69 blades. The new irons look good, but performance wise, as long as you have been properly fitted, there is really no difference between newer or elder models.
Pub
Aug 17, 2016 at 3:17 am
They’re only matching everybody else’s prices. Not a big deal. It’s the state of things now.
doesnotno
Aug 17, 2016 at 8:43 am
“the crap DG S300”
Yup, there’s a shaft that will never catch on.
Brian
Aug 17, 2016 at 1:52 pm
Too bad the DG S300 wasn’t the stock shaft in the 850s.
Justin
Aug 16, 2016 at 5:55 pm
Is it just me or is does the new price for a set of irons seem to be around $1,200??? $999 was bad enough but now it’ll cost the average golfer about $2,640 for a full set excluding putter ($1200 irons, $500 driver, $300 3-wood, $250 hybrid, $130 wedge x3). I guess very few people go out and buy brand new everything all at once, but this pricing seems more and more outrageous each year.
Pub
Aug 17, 2016 at 3:19 am
Yeah it’s because they’re all offering so many kinds of shafts included in the price now, unlike 2 years ago when most of those were all uncharged to this price from the basic shaft option price. We’ve come a long way in getting so many shafts included in the one price
Steve
Aug 16, 2016 at 4:10 pm
Looks like the OEM’s are catching onto Hi-COR irons like Wishon did years ago.
golfraven
Aug 16, 2016 at 3:21 pm
Mizuno are building some great looking sets in recent seasons – worth considering.
Tom
Aug 16, 2016 at 1:33 pm
chromoly I like the sound of that. Sir 138 carries..you have 145 to the center ….Hand me my chromoly 9 iron……
Ryan
Aug 16, 2016 at 1:18 pm
Does this mean that Mizuno will no longer offer no up charge custom shafts? That was a big selling point for them this year.
Brian
Aug 16, 2016 at 3:06 pm
It seems that they’re hiding the upcharge in the base price
Chris
Aug 16, 2016 at 6:28 pm
Right. Still no upcharge shafts, but they included Recoil Graphite in at $900 as well as the steel prices so no more Orochi. It’s Recoil and PX Loading Zone for graphite. Chromoly’s are stupid long, too.
sumsum
Aug 17, 2016 at 7:37 am
Except they were the first to offer no upcharge shafts, so they aren’t baking it into the price, this is just the market now. At least Mizuno technology is reflective of actual innovative work that takes time and resources to develop new constructions and usage, like chromoly and boron. Development creates cost.