Costco, the home of wholesale, is a wonderful place where you can buy a 12-pack of steaks, a year’s supply of ketchup, two pounds of cheese balls, refurnish your house and re-up your wardrobe… all in one trip. Now, you can also pick up two dozen, four-piece urethane golf balls for $30 at certain local Costco warehouses, or online.
The golf balls are branded with the Kirkland Signature name, which is Costco’s in-house brand that makes all sorts of things: alcohol, food, house supplies and much more. Costco says the Kirkland brand must be equal to or better than the national brands, and must offer a savings to Costco members. The $15-per-dozen Kirkland Signature golf balls are USGA conforming, and are produced by Nassau Golf Co. Ltd of South Korea.
Sounds good, but what are real golfers saying about the Kirkland Signature golf balls?
GolfWRX members, who are some of the most knowledgable golfers in the world, have not hesitated to weigh in on the Kirkland-branded balls, filling up a 31-page forum thread (and counting).
Related: Join the discussion here.
“Same driving distance, and flight pattern (as the b330rx),” Forum member Two_Putt said about the Kirkland Signature Balls. “I can’t check the ball on the green but I did notice that it didn’t run out as far. Overall in my opinion a great value and my new ball of choice.”
As you may know, another popular manufacturer making four-piece urethane golf balls is Titleist with its Pro V1x, which sell for about $48 per dozen. A few forum members took it upon themselves to test the “KSigs” against the Pro V1(x)’s. Some of their reports below.
Coreyhr: “Here’s my hot take on the Kirkland. I normally game a Pro V1x and that’s what I was comparing against on my Skytrak. The feel off the driver in my opinion is better than the ProV, seriously the best feeling ball off the driver I’ve ever hit. The irons however left a lot to be desired for me. They felt clicky off of long and mid irons compared to the ProV. I don’t quite understand why one feels so good but the other not so much. I hit enough shots that strike shouldn’t be the culprit. The Kirkland was 2-3 yards longer for me during a 6 iron comparison due to lower spin than a ProV. Launch and peak height were virtually identical. Launch with a driver however was actually about 2 degrees lower with the Kirkland interestingly enough. I won’t be putting the Kirkland in the bag during tournament play, but absolutely will use it for those afternoon rounds after work. This thing is a serious threat to the big boys in the market.”
“Lots of comparisons to the pro v1/v1x’s. There more similar to the project a’s in looks(almost identical), feel(tad firmer), and spin after playing them imo. When you put the $15 a dozen perspectives into consideration there isn’t any negatives that can really be justified I guess. Hopefully the price doesn’t jump $10 by spring but even then it would still be a great deal.”
tw_focus: “…Overall it’s a nice ball, BUT I think I will stick to ProV1s. I don’t spend a whole lot of money on golf balls (4x boxes of ProV1s during sale time have lasted me the season), the major cost / investment is my time. I don’t want to play with anything less than the best, and I think the Kirkland balls are slightly worse (though I admit a much better value).”
suprfli6: “Played 18 with one yesterday and it actually felt firmer off the driver than my usual Pro V1, but similar distances and spin with every type of shot I played. It was cooler than I’m used to so maybe that contributed to the feel difference. Too soon to tell for sure but personally it seemed to perform like a typical urethane tour ball so considering the price I’m optimistic.”
gripandrip: “Not like this will be a surprise, but I think I am a convert as well. Played two rounds this weekend, one on a links course in 25mph winds (on the shore of Lake Erie) and the other under normal conditions. No noticeable loss of distance, decent flight through the wind, acceptable spin on and around the greens. I am typically a Pro V1 player. Do these balls feel as good off my club as a Pro V in all instances? No. But close enough that I will probably change, for a while at least. However, I won’t be buying large quantities. If I bought 50 dozen balls, they would probably have to be cleaned out of my basement after I die. That’s a lot of balls.”
MarkCPA: “…Overall, I’m very impressed given the price of the ball. I saw no material differences in the K-Sig performance-wise vs. any other premium ball I’ve got good experience with including the TM TPX and the ProV1X. It has very good greenside control and is plenty long. I already placed an order for four dozen. I don’t see how anyone who wants a tour caliber ball but hates dropping $45+ on a dozen balls wouldn’t give the K-Sig a try.”
RSinSG: “…As I wrote earlier, I play ProV1x that I get for $20/dz from Golfballsdirect.com and to be honest I like the KSig’s as much if not a little better. I’m not saying they are a better ball than the ProV1 – only that I like them. If you’re on the fence try them. $15 a dz is a crazy good deal. I just ordered 3 more boxes before the free shipping ends.”
And remember, as per Costco’s policy, if you don’t like the product, you can always take it back for a full refund.
“I saw a lady return a jar of peanuts to Costco minus the jar,” forum member FiveSixAce said. “A gallon zip lock bag full of peanuts. They took it back.”
Tough to tell if he’s joking or not.
Korea’s FreeFlex shaft proves that lightning strikes twice
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.
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.
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.
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.
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.
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.
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.
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.
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.
Coolest thing for sale in the GolfWRX Classifieds (1/31/23): Bettinardi Hive BB0 putter
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
Modern Classics (Ep. 3): Testing the TaylorMade Rocketballz RBZ Tour from 2012
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?
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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