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Mizuno JPX 900 drivers, fairway woods and hybrids

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In the golf equipment world, it’s rare for new releases and technologies to produce drastic distance gains in off-the-rack purchases, mostly due to limitations by the USGA. But where many new releases excel is in their increased adjustability, which allows golfers to fine-tune their clubs to fit their preferences and needs. That can create big distance gains, and a host of other benefits as well.

Mizuno is at the forefront of the custom-fitting movement with its JPX-900 drivers, fairway woods and hybrids, which were designed with focus on allowing golfers to optimize their swings and properly gap their clubs. That means golfers can get their games dialed in more than ever before.

Thanks to the added adjustability of the new JPX-900 driver, golfers can optimize spin rates, fine tune their visual preferences and help reduce their big miss. The new JPX-900 fairway woods have a central sliding weight that allows the clubs to perform as either a rocket launcher from the tee or high-ball hitting clubs that will stop shots abruptly on greens. The new JPX-900 hybrids have also undergone design changes to better fill a golfer’s yardage gaps, and look better, too.

Learn more about each of the new offerings below, and join the discussion about Mizuno’s JPX-900 clubs in our forums.

Mizuno JPX-900 driver

Mizuno_JPX_900_Driver

When designing the JPX-850 driver, which the JPX-900 driver is replacing, Mizuno “pulled out the stops,” says David Llewellyn, Mizuno’s Director of R&D. “We changed our attitude to make premium and aspirational drivers to match up with our irons.”

With a blue crown, adjustable center of gravity (CG) and adjustable hosels, Mizuno definitely broadened the scope of their drivers. Now, the company is expanding its technologies to cast an “even wider net,” according to Llewellyn, with a goal to “bring the most adjustable driver ever to the market.”

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To do that, Mizuno’s new JPX-900 driver offers an “Infinite Track,” which allows golfers to adjust center of gravity forward or rearward for trajectory and spin rate adjustments. It’s different from the familiar “Fast Track” of its predecessor, because there are no longer pre-determined spots on the track to put the weights; thus, the new track has infinite settings.

Also, like the JPX-850, JPX-900 drivers have two additional weight ports in their soles on the heel and toe of the clubs. They allow golfers to take one of the two weights and make the head either draw or fade-biased. The drivers also have adjustable hosels for lie angle and loft adjustments.

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Also new on the JPX-900 heads is VFA (visual face angle) adjustor that allows golfers to alter the soled face angle of a club, making it more open or closed at address. This is especially beneficial for gear heads who want their club head to look a certain way, or protect against missing shots a certain direction.

Not only is the 450-cubic-centimeter JPX-900 made to be more adjustable than ever, but it’s also designed to be more forgiving on off-center hits. This is accomplished through added technology you can’t see. With its new “CORtech” face design, Mizuno added support behind the face at the equator, but also vertically along the center of the face. This means that shots hit off center, or too high or too low on the face, will have additional forgiveness compared to their predecessors.

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The JPX-900 drivers are adjustable from 7.5-11.5 degrees in 1-degree increments. The stock shaft family is Fujikura’s Speeder Evolution II shaft, which has a counter balance design and comes in a variety of flexes and weights.

Why the Evo II? “With a linear bending profile, it’s perfect for a max-adjustable driver,” Llewellyn said.

Mizuno JPX-900 fairway woods

Mizuno_JPX_900_farirway_woods

Mizuno also implemented the new infinite-track technology in its JPX-900 fairway woods to allow golfers to fine-tune spin and trajectory, so whether your fairway wood is primarily used off the tee or from the fairway on approach shots, you can maximize its effectiveness.

Move the track forward and a JPX-900 fairway wood becomes a lower-spinning, lower-flying option from the tee. Move it rearward and it becomes a higher-spinning, higher-launching club with more forgiveness to give you a better chance of hitting and staying on the green with your long approach shots. With Mizuno’s infinite track, spin rates can change by 450 rpm, according to Mizuno’s testing.

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Also in the JPX-900 woods are a “Shockwave” sole, a waffle crown and a new head design. The Shockwave sole helps give the fairway wood a more forward CG, but is said to maintain high-COR on shots hit low on the face, which is a common spot for golfers to contact their fairway woods, especially when hit off the turf.

“The shockwave acts like an accordion, and concentrates weight forward and low on the face,” Llewellyn said.

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A “Waffle Crown” on the fairway woods refers to the multi-thickness design, which allows weight to repositioned for better forgiveness and lower CG while maintaining strength.

The JPX-900 faiway woods, which are available in 15, 18 and 21-degree stock heads, will come stock with a Fujikura Evolution II shaft and Golf Pride M31 360 grips. They will sell for $299.99 starting on September 16.

Mizuno JPX-900 hybrids

Mizuno_JPX_900_hybrid

For its hybrids, Mizuno focused on providing golfers with clubs that will bridge the gaps between their woods and longest irons. To accomplish that, Mizuno put emphasis on head shaping, which gives the clubs a more streamlined appearance that blends better with a golfer’s fairway woods and long irons

Each hybrid head (16, 19, 22, 25 degrees) was individually designed for the task, with the common goal of giving each club the right look at address. If you’ve ever looked at a high-lofted hybrid and shook your head — the leading edge seems to jut way too far in front of the hosel — you know the problem Mizuno was trying to fix. To solve the issue, Mizuno gave the hybrids a progressive amount of offset as loft increased, which gives the club faces a more traditional, iron-like look.

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In terms of tech, the hybrids were designed with a 1770 maraging steel face, a shockwave sole and a thicker sole-design than its predecessors for a lower CG.

The stock shaft in the JPX-900 hybrids is a Fujikura Pro available in 83X, 73S, 63R and 63R2, and the clubs will sell for $249.99 beginning on September 16.

Related: See what GolfWRX Members are saying about the new JPX-900 Drivers, Fairway Woods and Hybrids in our forum. 

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He played on the Hawaii Pacific University Men's Golf team and earned a Masters degree in Communications. He also played college golf at Rutgers University, where he graduated with a Bachelor of Arts in Journalism.

13 Comments

13 Comments

  1. Rich

    Sep 2, 2016 at 3:23 am

    Link to forum thread doesn’t work for me. Keeps saying error and that I don’t have permission to view that thread and I’m logged in. Please fix it.

  2. Mark

    Aug 30, 2016 at 9:49 pm

    How can a company that makes such gorgeous irons constantly get their woods so wrong? They look bling and Cobra ish and not in a good way. No wonder our local stockists stick to irons and wedges only.

  3. Dave R

    Aug 29, 2016 at 8:35 pm

    Mizuno are probably the best iron I have played, been a ping guy for years but switched this year and not looking back. Still play the g25 woods though hard to get rid of them.

  4. Jeff

    Aug 29, 2016 at 5:45 pm

    For $1200 the JPX 900 better go 325 yards right down the middle every time.

  5. Bigboy

    Aug 29, 2016 at 5:08 pm

    Stick to irons Mizuno.

    • DevilDog18

      Aug 29, 2016 at 11:46 pm

      Why not hit it first then judge in Bigboy

  6. Chance

    Aug 29, 2016 at 5:07 pm

    I loved the 850 and still do as I am gaming it. Never had the respect for Mizuno before I tried that driver. These look just as fantastic. Would love to try.

  7. Lester Diamond

    Aug 29, 2016 at 12:17 pm

    $300 for a fairway wood, and $250 for a hybrid? I also see there is no price listed for the driver.

    Shank.

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Equipment

Korea’s FreeFlex shaft proves that lightning strikes twice

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The biggest obstacle to success is said to be a closed mind. If past innovators had not been bold in trying new things and testing conventions, we may still be playing with featheries and hickory shafts. Thanks to their pioneering ways, the game was able to evolve into the wonder that it is today and I am grateful for all the advantages I have enjoyed.

According to a recent YouTube video uploaded on TXG, one such innovative product they have tested in recent years is the Autoflex shaft. Despite the shocking pink color and a high price tag, the whippy shaft from a relatively unknown Korean manufacturer has won over a significant number of golfers with its promise of distance and accuracy while going easy on the body. The shaft opened up a whole new shaft category by itself, and after almost three years it is still pretty much the only fighter in the ring.

So why haven’t more companies been entering this niche pioneered by Dumina? The market is clearly there. Surely, there must be other manufacturers capable of putting out their own versions? Is KHT really something that no one else can figure out? Whatever the reason, there hasn’t been any serious contenders making a run at the champ. Until now, that is.

The premium ultralight shaft category has a new entrant in FreeFlex shaft… from South Korea, where else?

Ottophlex?

In the absence of established shaft makers, I did see a lot of individuals on various online forums trying to find their own version of a cheaper Autoflex. Affectionately dubbed as OttoPhlex, I have come across several impassioned posts where golfers have detailed their endeavors to find an effective replacement. To their delight, many have said their bargain shafts also produced noticeable distance gains while retaining accuracy.

That’s just awesome. I think it’s great that Autoflex generated such an interest in golfers to turn over every stone in our search for all the advantages we can get. One caveat, however, seems that an OttoFlex shaft that worked wonders for one guy sprayed the ball all over the place for another. Of the various OttoPhlex shafts I have seen online, I have yet to see a true contender that worked for a wider group of golfers like Autoflex.

In a way, Autoflex reminds me of Floyd Mayweather, Jr., the unbeaten boxing champ. Love him or hate him, one can’t deny that his boxing skills are effective. Similarly, whatever Korea Hidden Technology may be, it simply works and deserves its just dues.

One unique attribute to FF’s water color shaft is that no two shafts are the same.

A Korean Lightning Strikes Again

Now a promising new challenger has entered the ring to contend for the title of the ultra-light premium shaft. The contender, also hailing from South Korea, goes by the name of FreeFLexx (OttoPhlex was taken, obviously) and comes with an extraordinary spec sheet. And to save you readers some time, the shaft is nothing short of amazing.

Dr Seung-jin Choi, founder and CEO of SJ (Special Joy) Golf Engineering Lab, is a lifelong golfer/entrepreneur with an impressive resume and some pretty unconventional ways of thinking. With a PhD in materials engineering, he has over 30 patents in various fields, including materials engineering, architecture, and industrial design and 12 patents (and growing) in golf clubs and shaft design. His appetite for knowledge is only rivaled by his keen ability to adapt and apply them effectively to his research and inventions.

Ever since AF came on the scene, I’ve been waiting for other OEMs to offer similar tech and performance to the AF at a lower price tag so that it can be more accessible to a wider audience. Err… let me return to that idea later. 

When I first met Dr Choi, I thought I’d stepped into a golfer’s version of Dr Frankenstein’s laboratory. I’d love to mention some of the jaw-dropping golf innovations he is working on, but an embargo dictates otherwise. But I guarantee you will hear more of his mind-blowing creations soon. Just remember I said it here first.

Care for some ultra-light carbon putter shafts that can make any putter stand upright on its own? Then RolyPoly is for you. Just one of many zany things in the works at SJ Golf Lab.

Opening the box, I half-expected to see the color pink and breathed a sigh of relief at the sleek matte black carbon weave design. But aesthetics aside, the shaft had to first check all the requisite boxes for me to even consider it a true contender to the AF. After all, this weight class is not for just any AF wannabes or conventional senior-flex shafts.

To be clear, I am a big fan and user of AutoFlex shafts. But seeing the FreeFlex shaft check all the same WOW factor boxes gave me goosebumps. “Has AF finally found a match in the FF?

From Theory To Reality

According to Dr. Choi, FF technology is a totally different animal from KHT in concept and manufacturing method and is solidly rooted in measurable and verifiable science. It all began over two years ago with a single question, “Which part of the swing most determines the performance of a golf shot?”

After consulting hundreds of top amateurs and pros along with top professors in sports sciences, he determined that an effective downswing transition was key to long and accurate shots. This led to his next question, Can a shaft be made to provide golfers with a repeatable and effective downswing transition for better impact and ball control?”  With this specific goal in mind, Dr Choi embarked on his research, drawing on his 30+ years of golf experience and scientific background. To many people’s surprise, he was able to prove some pretty eye-opening facts along the way.

I’ve often said that some of golf’s commonly-held conventions should be re-examined lest we may have overlooked anything. With new materials and applications for its use being discovered each year, I definitely think new ‘breakthrough’ discoveries are possible. AF and FF are just the tip of the iceberg.

Before I begin, let me also state that I am an absolute novice when it comes to shaft engineering and manufacturing. I still don’t know what KHT is about, and I am just as ignorant about FreeFlex technology (FFT) as it, too, is veiled in secret and awaiting a patent. So bear with me as I try to explain the idea and innovation of FFT, as translated from speaking with the inventor.

The waggle test that put AF on the map can be seen in the FF as well

FreeFlex Tech – The New Secret Sauce?

Prototypes of the FreeFlex shafts were first launched in April 2022 exclusively in Korea and were tested extensively among the pros and the club fitting community. Soon, word of mouth began to spread among the pros, who were taken aback by the performance benefits of FF. More interestingly, the FF also came under scrutiny from the sports academia as well as the club fitters, most of whom were absolutely skeptical that the shaft can do what it claimed. And Dr Choi was more than happy to show the science and the research to back up his work with FreeFlex.

Having listened to the inventor, however, I can’t really fault them for being doubtful. After all, Dr Choi’s questions and unconventional thinking challenged many of the established notions that I also thought were rock solid. For example, can a single shaft exhibit two different flexes? That is, can one side can be stiff to promote accuracy while the other side is flexible to add an extra kick for more distance?

When everyone said that’s impossible, Dr Choi said “I’ll show you. Let me boot up my computer.”

“We have developed a unique shaft to which the pronate and supinate principles have been applied by considering not only the swing toque acting upon the shaft; but also in considering the warping moment and bending torsional moment to optimize Impact and MOI.” – Dr. Seung-jin Choi, inventor of FreeFlex Technology

Before all this, I thought I knew the relationship between a shaft’s flex and torque. Namely, a low torque corresponds to a stiff flex and vice-versa, and more flex may lend itself to more distance, but at the risk of less accuracy. Despite what I thought I knew, Dr. Choi informed me that this was not always the case. In fact, he found that torque and flex (CPM) can be independent of each other and that a 35g shaft with 170cpm can have a torque as low as 2.0. That’s even lower (and firmer feeling) than an extra stiff tour shaft!

In explaining how he can manipulate torque and flex in any combination desired, the actual math and science went straight over my head but I was offered a simpler explanation. Imagine that one side of the shaft has a limiter on it, while the other side has an accelerator. The limiter prevents the shaft from twisting and bending past a certain threshold to increase the chances of the shaft returning back to its original position for accuracy. In turn, the accelerator would activate on the downswing to increase club speed for added distance. As improbable as it sounds, this is the basis for FreeFlex.

But hey, we all know that anyone can talk the talk and all is for naught if it can’t perform. So can FF really put its money where its flex is?

Battle Of The Flexes

Over the past three years, many golfers have given testimony to the effectiveness of AF and I have also enjoyed my own AF to mostly good ends. While I’m not the foremost expert by any means, below is my own assessment of the similarities and differences that I have observed between AF and FF.

Overall, I found that FF not only was comparable to AF in both distance and accuracy, but it also offered three key differences which may be welcomed by golfers hesitating to pull the trigger on the pink bomber.

Observations

The first difference was the swing weight recommendation for both shafts. The AF 405 and FF 405 had similar weights (45g raw) and flex (190cpm), but the swing weight was totally different at C8 and D1.5, respectively.

From the beginning, AF shafts have frustrated many a golfer trying to get the swing weight down, since the average driver heads were too heavy. As a result, it required switching to lighter head weights or removing them altogether. In addition, certain brand club heads were not suitable for AF, and sometimes the overall driver build length had to become shorter as well. Needless to say, this irked a lot of players and golf fitters who had never encountered such hurdles in their drivers. It is a testament to AF’s performance that so many golfers have put up with it at all.

In comparison, the FF shafts seem more accommodating in this department. The recommended SW for the 38-series is at D2~D5, which should make club fitting all that much easier for a wider variety of driver heads.

FF shafts feature the weight, CPM, and torque. The bow and arrow symbolizes the idea of FreeFlex Tech, as the shaft reacts to even a small amount of energyacted upon it, much like a bow.

The second key differentiator between the two is swing mechanics. By nature, I am more of a swinger than a hitter, and AF suits my swing super well. With a slow and measured backswing and a smooth downswing transition, I have gained nearly 20 yards over my past conventional shaft. As such, many golfers have testified to benefit from slowing down and smoothing their transitions to unlock AF’s performance. However, for golfers with an aggressive or quick transition, the AF proved difficult to tame, which has led many to believe that AF is only suitable for smooth swingers.

FreeFlex, on the other hand, claims that its shafts can be swung effectively regardless of the type of downswing transitions. From my own limited testing with three friends in this regard, I can say that FF did fare better than AF for hitters with a more aggressive swing. More specifically, FF shafts were noticeably more resistant to the left side and kept hard hooks to manageable draws to keep the ball in play more often. Dr. Choi also added that the shaft is less prone to break, as it uses higher grade carbon content over its counterpart.The third big difference noted by most testers is that the FF shaft feels more stable throughout the swing. Keep in mind that feel is subjective, and “stable” here is only referring to the feel and not the actual shot result. From my experience, the AF shaft is soft and malleable on both the backswing and the downswing, which took me a few weeks to get used to and trust that the head will return to square.

In contrast, FF has the same low CPM but the shaft is noticeably firmer especially on the downswing, giving a feeling of stability. I was better able to feel where the club head was at all points of the swing, and that gave me a slight edge in confidence on the money shots. 

The three aspects were the biggest differences that were reported by FF users, and I can also agree on the observations. On a Trackman, my current AF was on average longer by 2m with a 4% smaller dispersion, while the longest single drive by each shaft favored the FF at 239m to 231m.

What gave me pause was that while AF has been my trusted gamer for the past 2+ years, I only hit the FF a couple of times since receiving it. And despite the short duration and novelty, FF performed just as well for me as AF, with the alluring promise of further fine-tuning and additional improvements to be had. Welcome to the weight division, FF.

Measurements on the butt end makes it convenient to trim the shaft to desired length.

Price And Availability

Unfortunately, FreeFlex tech shafts are currently available in Korea for the time being, though an English website is in the works at www.freeflexshaft.com for February. According to the company, offline retailers and custom fitters will soon be available to offer FreeFlex in three color options; matte carbon black, glossy carbon blue, and a one-of-a-kind custom watercolor design. 

All these ultralight and performance-enhancing factors do not lend themselves to low pricing either. The retail price of the FF driver shaft is set at $650, and while it is much higher than most premium shaft offerings on the market, it is nearly 20-percent less in comparison to the Autoflex at $790.

Aside from multi watercolor, FF comes in matte and glossy carbon weave tinged in blue color that looks amazing outdoors

For a limited time starting in February, SJ Golf is also taking applications from professional golfers and reviewers to test the FreeFlex demo shafts. Applications and inquiries can be sent to [email protected] and the company will notify the results individually. 

And there you have it. The FreeFlex shafts have arrived to join the party and I can’t wait to see who else joins this exclusive club. It would be great to see who rules this ultra-lightweight division, but no matter who is crowned champion, it will be us golfers who will be the ultimate winners.

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Coolest thing for sale in the GolfWRX Classifieds (1/31/23): Bettinardi Hive BB0 putter

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At GolfWRX, we are a community of like-minded individuals that all experience and express our enjoyment of the game in many ways.

It’s that sense of community that drives day-to-day interactions in the forums on topics that range from best driver to what marker you use to mark your ball. It even allows us to share another thing we all love – buying and selling equipment.

Currently, in our GolfWRX buy/sell/trade (BST) forum, there is a listing for a Bettinardi Hive BB0 putter

From the seller (@Tyrick24): “Bettinardi Hive BB0 – $1500 or trade. Indoor rolled only. Bettinardi SS Pistol GT 1.0. 35″. Lie 68*. Loft 2*.”

To check out the full listing in our BST forum, head through the link: Bettinardi Hive BB0 putter

This is the most impressive current listing from the GolfWRX BST, and if you are curious about the rules to participate in the BST Forum you can check them out here: GolfWRX BST Rules

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Modern Classics (Ep. 3): Testing the TaylorMade Rocketballz RBZ Tour from 2012

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GolfWRX recently launched a new 8-part video series, called “The Modern Classics,” in partnership with 2nd Swing Golf. Throughout this video series, GolfWRX’s Head of Tour Content, Andrew Tursky, tests out 8 legendary used golf clubs that are still being played on Tour today. How do the older, less expensive products compare to modern technologies?

In the first two episode’s Tursky tested out TaylorMade’s Tour Preferred MC 2011 irons, and Adams Idea Pro hybrids from 2006.

For episode 3, we highlight the TaylorMade Rocketballz RBZ Tour 3-wood, which first hit the market in 2012. The fairway woods are currently available for $84.99 on 2nd Swing’s website.

Check out the video at the top of the page for more on the product, design, and how it stands up in testing against a modern 3-wood.

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