Pros: The Hi-Rev 2 adds approximately 250 rpm more spin than the original. The 610 is impressively stable and low-launching for high-spinning wedge shaft.
Cons: They’re $43.95 each. Shaft weight is based on flex.
Who’s it for: The 610 is for high-spin players who prefer a penetrating trajectory. The Hi-Rev 2.0 targets players looking for increased launch and spin from their wedges.
To understand the purpose of KBS’ new 610 and Hi-Rev 2.0 wedge shafts, it’s helpful to consider the unique role wedges play. Often referred to as “scoring clubs,” serious golfers know how important it is to be able to hit a variety of shots on multiple trajectories from 125 yards and in. To this end, KBS Shaft Designer Kim Braly developed two wedge-specific shafts, each of which offer particular launch and spin characteristics.
The 610 is a butt-stiff shaft that is engineered to produce a lower flight with slightly less spin (200 rpm more than KBS’ stock wedge shaft). It is available in three flexes/weights:
- 110 grams (Regular Flex)
- 120 grams (Stiff Flex)
- 125 grams (Stiff + Flex)
The Hi-Rev 2.0 is the second take on the popular Hi-Rev shaft. The original Hi-Rev produced a launch similar to the KBS’ Tour wedge shaft, but had a more active tip section for increased spin. In comparison, the Hi-Rev 2.0 is higher launching and higher spinning than the Hi-Rev. In testing, the Hi-Rev 2.0 exhibited approximately 700 more rpm of spin than the standard KBS Tour wedge shaft and 250 more rpm of spin than the Hi-Rev.
It is also available in three weights/flexes:
- 115 grams (Regular)
- 125 grams (Stiff)
- 135 grams (X-Stiff)
In both on-course and range testing, the Hi-Rev 2.0 and 610 held true to their stated performance characteristics.
On full shots with my 56-degree Callaway Mack Daddy 2 and 52-degree TaylorMade Tour Preferred wedges, the 610 felt suspiciously like the KBS Tour-V iron shaft. This isn’t surprising given the similarity in bend profile, step pattern and weight between the Tour-V and 610. The flight was a touch lower than my current wedges, but still plenty high enough to hold firm greens.
Where the 610 really earned its stripes was on partial and three-quarter shots. It was like tossing bean bags filled with lead. Shots from 40-to-60 yards often took a single hop and then stopped within 3-to-4 feet of the pitch mark. Several shots simply stuck like Nastia Liukin in the 2008 Olympics.
If you find yourself ripping wedge shots off greens or struggling to hit your wedges low enough, the 610 might be the cure to your ills.
I also tested a 56-degree Callaway Mack Daddy 2 wedge with the Hi-Rev 2.0 in stiff (125 grams). On full shots, it created a bit too much spin for my game, but shots from the rough and varied lies did have a bit more grip on them than I’m used to. On less-than-full shots inside 100 yards, the Hi-Rev was lively, and for a shaft with a more flexible tip section, it never felt loose or out of control. In fact, the increased launch and spin could become quite useful in firm courses and touch shots around the green.
As such, Braly expects nearly 20 percent of KBS tour players to fit into the Hi-Rev 2.0, with the other 80 percent or so opting for the 610.
The possibility of seeing both the 610 and Hi-Rev 2.0 as inline options from OEMs moving forward is certainly there, however, for the time being, they be available through certified KBS retailers and carry an MSRP of $43.95.
If there’s a subtext to this conversation it’s that wedges — because of the loft and USGA groove regulations — can only be tweaked so much by modifications to the head itself. By opening the conversation to include wedge specific shaft designs, Braly is trying to shift a paradigm and get players to place the same intensity on wedge fitting many do their longer clubs.
If you find yourself wishing you could stop wedge shots closer to the hole, wedge-specific shafts are a great place to start. Both the 610 and Hi-Rev 2.0 should be on your list of shafts to test.
Here’s why Jordan Spieth switched into a new Fujikura Ventus TR Blue shaft at Pebble Beach
When Fujikura’s new Ventus TR Blue shaft launched in January 2022, we learned all about the updated construction and potential performance benefits compared to the original Ventus Blue. It was unclear at the time, however, exactly who would make the switch into the new TR design on the PGA Tour.
Well, we’re starting to get some answers.
Jordan Spieth, who’s been relatively slow to change into new products throughout his career, is among a handful of names making the change. Spieth conducted recent testing with a Ventus Blue TR 7 X shaft in his Titleist TS2 15-degree fairway wood, and he put it in play this week at the 2022 AT&T Pebble Beach Pro-Am.
Titleist Tour representative J.J. Van Wezenbeeck, who works closely with Spieth on his equipment, said that Spieth came to the Titleist Performance Institute (TPI) on Friday before the 2022 Pebble Beach Pro-Am for a check-up on his equipment. Since Spieth was previously playing Ventus Blue shafts in his Titleist metalwoods, he was intrigued by the new TR version.
As it turned out, Spieth found the new shaft to help with his transition and directional control.
“Coming from Ventus Blue, anytime they update a shaft you’re just intrigued on that, and he liked how [the Ventus TR Blue] loaded compared to the original Ventus Blue for him,” Van Wezenbeeck told GolfWRX on Tuesday. “He felt like when he mishit it, there was a little more control. So that was a good option for him…we did a little bit of internal work on the head to make sure there’s enough spin, because want to make sure his 3 wood doesn’t have too low of spin. He liked how the TR reacted on mishits where the spin didn’t drop, and it had more consistent spin from swing to swing.”
Due to a new Spread Tow fabric in the butt-end section, which is essentially a checkerboard pattern of woven material, the torque on the TR version is 10 percent stiffer in the mid-to-grip end of the shaft. As a result, Fujikura says the TR shaft is designed to improve stability and consistency compared to the original Ventus Blue.
Based on Spieth’s results with the TR shaft during testing, it seems Fujikura’s case holds water.
Pat McCoy, Director of Tour Operations at Fujikura, spoke with GolfWRX about the new shaft, and what players are seeing in their testing out on Tour.
“Compared to the original Ventus Blue, the TR has a stiffer mid-section and lower torque,” McCoy said. “Basically what the shaft does is it eliminates some of the dynamic loft. It eliminates some of the rotation. Obviously, the Ventus Blue was a very stable shaft and one of the best launching shafts we’ve ever had. And we just made it better.
“As far as ball speed and launch and spin, I’m not going to say it’s faster, but we have seen players who have achieved faster speeds with it. It provides more consistency and the ability to turn swing speed into ball speed better. And that’s it. It’s a little stiffer than the original Blue, and it’s a little bit weaker than the [Ventus Black]. It’s a ‘tweener. It gives you something in the middle, and depending upon loft and impact location, you get a better fit.”
The fairway wood shaft wasn’t the only potential change that Spieth will make in 2022, though.
In addition to putting the new Titleist Vokey SM9 wedges in the bag, Spieth is also considering adding another option to the top end of his bag.
Typically, Spieth changes between a hybrid and long irons, depending on course conditions. During the recent session at TPI, though, Spieth took a liking to Titleist’s U-505 wide-bodied driving iron. Ahead of the 2022 AT&T Pebble Beach Pro-Am, Spieth took a U-505 2-iron (Graphite Design AD-DI 105X shaft) out onto the course for testing.
“He’s experimenting with a U-505 this week (ahead of the event at Pebble Beach),” Van Wezenbeeck told GolfWRX. “He’s always gone between a hybrid and either a 2 iron, or a hybrid and 3 iron, and we brought out a 505 as kind of a third option on a week where he isn’t sure whether he should play an iron or a hybrid. The 505 being a wide body iron is kind of a blend between the two. And he was really intrigued with how high it launched on a standard shot, and he could flight it more off the tee, where as with a hybrid he can’t do.
“So on weeks he feels like there’s a lot of irons off the tee, he likes to play the iron. On weeks where there are a lot of shots into par 5s, he likes the hybrid. On weeks where there’s a little of both…he felt the 505 might be an option, so he was taking it on the golf course [on Tuesday] to see how it would react.”
While it’s unclear exactly when Spieth will break out the new U-505, it seems like it’ll certainly be in the rotation going forward. The Ventus TR Blue shaft, on the other hand, has already earned a starting spot in the bag this week.
These changes may seem minor to some, but it shows Spieth’s willingness to find small equipment tweaks to improve his game. For amateur golfers, use this as a lesson when gearing up for the new season. Go through your bag, test some of the new shaft and head options, and see where you can make improvements. Now is the perfect time to take inventory and get prepared.
MRC Shaft Shootout: Tensei CK Pro White, Kuro Kage XT and Diamana BF-Series
The Tensei CK Pro White is the latest release from Mitsubishi Rayon Composites (MRC), a low-launch, low-spin shaft with a multi-material design that the company says improves the performance and feel of the shaft. Whereas most golf shafts use between 3-6 different materials in their construction, the Tensei CK Pro White is made from 11 different materials, giving MRC engineers greater precision in the shaft’s design.
Like MRC’s Tensei CK Pro Blue shafts, which produce a slightly higher-launching, higher-spinning ball flight, the CK Pro White uses MRC’s Carbon Fiber DuPont Kevlar Weave in the handle section of the shaft. The company says it increases the strength and stability of that part of the shaft, leading to better feedback.
On the other end of the shaft, the tip section, MRC uses a boron-reinforced fiber. All low-launch, low-spin shafts have stiff-tip designs, but the addition of boron puts the Tensei CK Pro White in a class of its own when it comes to lowering launch angle and spin rate. The boron fiber also reduces torque, which can offer better energy transfer, more accuracy and better feedback — especially for skilled, high-swing-speed golfers.
Connecting and reinforcing those areas of the shafts is MRC’s low-resin content (LRC) prepreg. Prepreg is carbon fiber that’s been reinforced or “pre-impregnated” with resin, a glue that holds the material together when it’s formed into sheets and rolled into the form of a shaft. MRC says that its LRC has 15 percent more carbon fiber and 13 percent less resin than traditional prepregs, which allows MRC to make the Tensei CK Pro White stronger without adding extra weight to the shaft. MRC also uses high-modulus, 40-ton prepreg in the Tensei CK Pro White’s design, which like LRC is thinner, stronger and lighter than traditional prepregs.
In the EI chart below, you can see how the Tensei CK Pro White’s bend profile compares to the CK Pro Blue. The main differences are its slightly stiffer tip and mid sections, as well as its slightly softer butt section. That gives the CK Pro White a higher “kick point” than the CK Pro Blue. Generally, the higher the kick point of a shaft, the lower its launch conditions. That’s why the Tensei CK Pro White is a lower-launching, lower-spinning shaft than the Tensei CK Pro Blue.
Just how much lower launching and lower spinning is the Tensei CK Pro White than MRC’s latest premium driver shafts? I put it to the test against the company’s Kuro Kage XT and Diamana BF-Series, which like the CK Pro White are PGA Tour-quality shafts that sell for about $400 each. All three shafts tested were built to my spec: 70TX, tipped 1 inch at a finished length of 45.5 inches.
I tested the three shafts on Trackman 4 at the Launch Pad at Carl’s Golfland in Bloomfield Hills, Mich. After warming up, I hit 10 drives with each shaft, and whittled my shots down to the most similar five to help illustrate the differences. Premium balls were used for the test, and results were normalized.
As expected, the Tensei CK Pro White was the lowest-launching, lowest-spinning shaft in the test. That’s impressive in its own right, but what will really excite golfers when they try a Tensei CK Pro White is the shaft’s feel. It’s noticeably smoother than the MRC White Board shafts I’ve played in the past. You could likely duplicate the launch conditions of the Tensei CK Pro White with similar products from other premium shaft makers, but I’m not sure its smoothness can be replicated in the category. It’s something special, and I expect a lot of serious golfers with above average club head speeds will be willing to pay a premium for it.
MRC’s Kuro Kage XT uses a stouter iteration of the company’s famed “Blue Board” bend profile, and in that regard it’s quite similar to the Diamana BF-Series. That’s what makes the shafts a little higher launching and higher spinning than the Tensei CK Pro White. The Kuro Kage XT has a much different feel than both, however, due to its use of an elastic wire made of Titanium and Nickel that MRC calls “TiNi” wire.
Related: Learn more about the Kuro Kage XT
In the Kuro Kage XT, the TiNi wire is added to the bottom 13 inches of the shaft, where it adds stability, but it also serves another purpose. Its elasticity allows the bottom end of the shaft to better load and unload during the downswing to help improve energy transfer. That’s what gives the Kuro Kage XT its more active feel, at least compared to the boron-infused tip section of the Tensei CK Pro White, which by design offer no elasticity.
The Diamana BF-Series also uses boron in its tip section, and its combined with a new, aerospace-grade fiber called MR-70 to create what MRC says is a first-of-its-kind hybrid prepreg. MR-70, which is manufactured by parent company Mitsubishi Chemical, is 20 percent stronger and has 10 percent more modulus than similar fibers, MRC says. The handle section of the BF-Series is reinforced with MRC’s Pitch Fiber, which functions to boost energy transfer like the CK Pro White’s Carbon Fiber DuPont Kevlar Weave.
In terms of launch conditions, the best fit for me was the Diamana BF-Series. It launched the ball a little higher than the Tensei CK Pro White, and added a little spin to help keep my drives in the air. It was also easier to swing than the Tensei CK Pro White, helping me more easily hit a draw while offering an even smoother feel due to its less rigid tip and mid sections.
To recap, if you need to lower your launch conditions, the Tensei CK Pro White is one of the most intriguing new MRC options to help you do so. Need a higher ball flight? Try the Diamana BF-Series. And if you want a radically different feel, give the Kuro Kage XT a try.
Have a question? Let me know in the comments section below and I’ll do my best to answer as many as I can.
Weights and Flexes
- Tensei CK Pro White: 60 (R, S, TX), 70 (S, TX), 80 (TX)
- Kuro Kage XT: 50 (R, S, X, TX), 60 (R, S, X, TX), 70 (S, X, TX), 80 (S, X, TX)
- Diamana BF-Series: 50 (R, S, X), 60 (R, S, X, TX), 70 (S, X, TX), 80 (S, X, TX)
Review: KBS Tour FLT Shafts
Pros: FLT shafts use a flighted design, which helps golfers launch their long irons higher and with more spin. The FLT short-iron shafts provide a more penetrating trajectory for more control.
Cons: FLT shaft flexes correspond with weight, so golfers may not be able to match their desired shaft weight with their desired flex.
Who They’re For: Golfers who need more spin or more launch from their long irons to optimize their trajectory. Everyone from beginners to PGA Tour players can use the shafts effectively, but they’ll be most popular with golfers with moderate-to-slow swing speeds, or any golfer who generates low-spin launch conditions.
Selecting the proper iron shafts is one of the most important equipment decisions golfers make. It’s an issue of quantity. Most golfers carry about 7-8 irons in their bag, so if they choose the wrong iron shaft, they’ve made the game harder than it needs to be with half or more of their clubs.
The good news is that there’s a wider selection of quality iron shafts than there has ever been, with recent growth in models that are designed to help golfers hit their iron shots higher and farther, while still maintaining PGA Tour-quality consistency and feel.
KBS is one of the leading steel shaft manufacturers, and already offered a wide variety of models prior to its newest shaft launch. Company representatives felt KBS was lacking a product for a particular segment of golfers, however, so it developed its new FLT shafts.
FLT shafts ($31.95 each) have a flighted design, which helps certain golfers optimize the performance of each iron their bag. The long irons shafts have progressively softer tip sections, which helps golfers increase their launch angle and spin rates with those clubs. For the right golfer, the design will help them hit their iron shots farther, and stop shots on the green more quickly. In the short irons, where height and spin are easier for golfers to generate, the FLT shafts are stiffer, which creates the flatter trajectory most golfers prefer with their scoring clubs. The crossover point between the higher-launching long irons and lower-launching short irons is the 7 iron.
Like all KBS shafts, FLT models have a constant weight, which means that long iron shafts and short iron shafts will be roughly the same weight through the set. Shaft weight is dependent on flex, however, as softer-flex models are lighter than stiffer-flex models. So if you’re looking for a really heavy, regular-flex shaft or a really light, extra-stiff-flex shaft, these aren’t for you.
Keep in mind that KBS shafts do not have reinforced tip sections like many other iron shafts, which gives them a slightly higher balance point and can decrease swing weight by 1-2 points. I personally like the feel of KBS shafts and their slightly higher balance point, but some golfers won’t.
For this review, I tested the new FLT shafts head to head against KBS Tour shafts of the same flex and weight (130X) in 4 irons, 6 irons and pitching wedges. Each of the shafts were installed in Callaway’s Apex Pro ’16 irons, and were built to my specifications (standard grips, standard length, 1-degree strong lofts, 1-degree flat lie angles).
I performed my testing at the Launch Pad at Carl’s Golfland in Bloomfield Hills, Mich., where I hit the 4 irons, 6 irons and pitching wedges on Trackman IV with premium golf balls. I hit 3-6 solid shots with each iron, and then removed the outliers from the final data in an attempt to compare only the most similar strikes. Results were normalized.
As you can see from the data, there was a significant difference in the flight of the 4 irons with the two different shafts, but less of a difference with the 6 irons and pitching wedges.
As expected, the FLT shafts caused 4 iron shots to launch higher (0.8 degrees) and with more spin (729 rpm) than the KBS Tour shafts. I’m not a low-spin player, which is one of the target audiences for this shaft, so the added launch and spin of the FLT shafts caused my 4 iron shots to fly shorter. Golfers who launch their irons too low or with too little spin, however, will likely see a distance increase when using the FLT shafts.
As I moved closer to the short end of the set, the two shafts started to perform more similarly. Theoretically, the 6 iron shots with the FLT shafts should have launched slightly higher and spun more than 6 iron shots with the KBS Tour shafts, but I actually saw a slightly lower launch angle (0.5 degrees) with the FLT. The spin was higher, though, by 211 rpm. With the pitching wedges, the results were again quite similar. The FLT launched 0.9 degrees higher, but actually spun 271 rpm less than the KBS Tour shafts.
Stepping back from the numbers, I was impressed with how similar the feel was between the KBS Tour and FLT shafts. Yes, I could feel that the FLT shafts were more active in the tip with the 4 irons, but they felt nearly the same in the 6 irons. By the time I got to the pitching wedges, the two shafts were indistinguishable. The KBS Tour is considered one of the better-feeling iron shafts currently available, so KBS’ ability to replicate that feel in the FLT will be a plus for the majority of interested golfers.
Looking more broadly, trends in shaft design tends to go hand-in-hand with trends in club head design, and the FLT shafts are no exception. Equipment manufacturers continue to strengthen the lofts of their distance irons; they have to in order balance the launch equation, as their faster ball speeds create a higher launch angle and more spin.
While the improvements to iron design have allowed golfers to hit their mid and short irons farther, many golfers continue to struggle to hit their long irons high enough or consistently enough for them to be effective. And based on my testing results, it’s clear that the FLT shafts can make long irons more playable for certain golfers, and maybe even keep long irons in a golfer’s bag that might otherwise be kicked out for higher-flying hybrids or fairway woods.
As always, I recommend that golfers get properly fit for iron shafts, which means visiting a reputable club fitter in your area. So if you’re in the market for new irons or iron shafts, you can get started by going through KBS’ Online Fit System, which upon completion lists KBS-certified dealers in your area.
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