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Opinion & Analysis

The Wedge Guy: Understanding CG

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One of the most misunderstood concepts involved in golf club design is that of “CG,” or “center of gravity,” also “center of mass.” While this particular measurement of any golf club head can certainly offer insight into its probable performance, it is not the “be all, end all” with regard to any club’s specific launch or forgiveness attributes.

What “CG” specifically refers to is the exact center location of a club’s distribution of mass, which will generally coincide with that club’s “sweet spot”—but that’s not always true. There are lots of ways to manipulate or manage any club’s exact CG location, and therein lies a “Pandora’s Box” of misunderstanding.

Let’s start back in the very old days, when irons were single pieces of forged steel and woods were made of persimmon. Since there was no science inside the club, CG was essentially a result of how the clubhead is formed—its essential shape.

A typical persimmon driver head, for example, was sized to deliver its ideal weight without any additional weights added. The solid block of persimmon, with some kind of face insert and an aluminum soleplate was all you had to work with. So, the CG was located pretty close to the center of the clubhead from all three axes – vertical, front-go-back and heel-to-toe. If you remember, persimmon fairway woods were smaller and had a brass sole plate to add mass lower in the head and often a lead weight under the sole plate to move the CG even lower to help produce higher ball flights on shots hit from the turf, rather than off a tee.

Traditional forged irons up to the 1960s-70s typically had a CG very close to the hosel, a result of the mass of the hosel itself and the typical design that put “muscle” behind the impact area, and very little mass out toward the toe. An examination of worn faces on those old irons would reveal the wear very much toward the heel. I distinctly remember fighting the shanks back in those days, and that ugly shot usually felt very close to a perfectly struck one, rather than feeling as awful as it looked.

As metal woods and cavity-back irons became the norm, designers were able to move the CG ever lower in order to produce higher ball flight, and more toward the center of the face to put the CG further from the hosel. As technology has continued to be refined, the use of tungsten inserts has further allowed designers to position the CG exactly where they want it – typically lower in the club and more toward the center or even the toe of the golf club.

And therein lies a problem with pushing this insert technology too far.

There is no question that in addition to making contact somewhere close to the CG of the clubhead, ball performance is also a product of how much mass is directly behind the impact point. Let me offer this example of how important that can be.

Let’s assume two identically shaped cavity-back 7-irons – same size, face thickness, overall weight and a design that places the CG in the exact same spot in the scoring pattern. The only difference between the two is that one is a single piece forged or cast steel head, with the other being cast of aluminum, with heavy tungsten inserts in the hosel and toe areas to achieve the same overall weight and CG location.
Which do you think would deliver the more solid feel of impact and better transfer of energy to the ball?

Now, we could take that even further by cutting out the entire center of both clubheads and increase the mass or the weight of tungsten in the hosel and toe to bring each back up to weight. The CG location would not change, but there would be absolutely no mass at all where the ball impact location would be. That would not work at all, would it?

I’ve learned long ago that it’s not just about the location of the CG that makes a golf club perform, but also the amount of mass that is placed directly behind the spot on the face where impact with the ball is made.

Here’s a fun, “non-golf” way to embrace this concept.

Suppose we had a two-pound sledgehammer and another 2 lb piece of steel hammered into a large circular sheet 1/16” thick. And then suppose someone hit you on the head with the exact CG of each one – which do you think would hurt the most?

Terry Koehler is a fourth generation Texan and a graduate of Texas A&M University. Over his 40-year career in the golf industry, he has created over 100 putter designs and dozens of wedges. In 2014, he put together the team that reintroduced the Ben Hogan brand to the golf equipment industry with his TK 15 wedges and Ft. Worth 15 iron designs. Since receiving a U.S. Patent for his “Koehler Sole” in the early 1990s, he has been challenging “conventional wisdom” in the wedge category. In addition to inspiring multiple companies to emulate this sole technology, the performance of his wedge designs have stimulated all other companies to reposition some mass toward the top of the blade in their wedges. Terry is retired from his role as Chairman and Director of Innovation for Edison Golf, and remains active in the industry as an independent designer and consultant.  But his most compelling work is in the wedge category. Since he first patented his “Koehler Sole” in the early 1990s, he has been challenging “conventional wisdom” reflected in ‘tour design’ wedges. The performance of his wedge designs have stimulated other companies to move slightly more mass toward the top of the blade in their wedges, but none approach the dramatic design of his Edison Forged wedges, which have been robotically proven to significantly raise the bar for wedge performance. Terry serves as Chairman and Director of Innovation for Edison Golf – check it out at www.EdisonWedges.com.

8 Comments

8 Comments

  1. Reid Thompson

    Mar 4, 2021 at 12:51 pm

    I was kind of looking for if low CG creates low spin or the opposite.

    • Terry Koehler

      Mar 7, 2021 at 2:50 pm

      A low CG will tend to reduce spin and elevate ball flight.

  2. Jon

    Mar 4, 2021 at 7:19 am

    You’re correct… I believe they’ve gone from extreme perimeter weighting , thinking forgiveness to understanding that if you create more back spin with a lower center of gravity, you create less side spin. .. Therefore, more forgiveness than perimeter weighting.

  3. Martien Schwencke

    Mar 4, 2021 at 6:45 am

    The point of percusion is not always where the centre of grafety is.
    A good desined club the point of percusion is locaed in the middel of the face.

  4. T Carter

    Mar 3, 2021 at 1:12 pm

    Not saying any of these comparisons are wrong, they are just not porportional to the game of golf. Another comparison you could make is pounding fence posts. You could use a sledge hammer to hit the top of a post or you could use a post pounder which provides consistent results due to innovative shaping of metal. A sledge hammer could be more effective in the use of very skilled hands, but the pounder is much much much more user friendly and even professionals use them too for consistency.

    Also keep in mind that we are swinging golf clubs at a very high speed and everyone could use some forgiveness even though a perfect shot may not perform like a perfect shot with blades.

  5. Joe

    Mar 3, 2021 at 11:00 am

    The last comment in this article proves this guy has no understanding of engineering. This literally just reads like a marketing piece to explain why his wedges are better.

    • Raj lp

      Mar 3, 2021 at 11:12 am

      Care to explain?

    • Engineer

      Mar 3, 2021 at 5:39 pm

      Agree. This makes no sense. If that 1/16″ thick metal hit you in the back of the head it would feel the same, except that the metal flexes and the load is distributed. Look at track man if you think there’s some kind of difference. Track man doesn’t ask you if you’re playing a cavity back iron or a muscle back blade. It simply says, path + face angle = ball flight.

      Very little of this article is about cg.

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Opinion & Analysis

Brandel Chamblee PGA Championship Q&A: Rose’s huge McLaren risk, distracted LIV pros and why Aronimink suits the bombers

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PGA Championship week is here, and Brandel Chamblee did not hold back in our latest discussion ahead of the season’s second major.

In our 2026 PGA Championship Q&A, golf’s leading analyst made the case that PIF pulling LIV’s funding has left its players competing in a state of confusion, called Justin Rose’s mid-season equipment switch a huge risk at 45, and explained why Aronimink will be a bombers’ delight this week.

Check out the full Q&A below.

Gianni: With the PIF confirming that they’re pulling funding from LIV at the end of the season, what impact do you expect that to have on the LIV players competing at the PGA Championship?

Brandel: I would imagine that they have all been thrown into a state of confusion, and will be distracted, not knowing where they are going to play next year and not knowing exactly their road back to either the DP World Tour or the PGA Tour. Or in Rahm’s case, being tied to a sinking ship for the next few years, likely playing for pennies on the dollar in events that no one cares about or watches.

I doubt this would put him in the best frame of mind to compete at his highest level. Keeping in mind, however, that majors are the only time that LIV disciples get to play in events that matter, so never disregard the motivation they have to prove to the world they are still relevant.

Gianni: Justin Rose switched to McLaren Golf equipment mid-season while playing some of the best golf of his career. What do you make of the change?

Brandel: I don’t really know what to make of Rose switching equipment. It seems a huge risk on his part, even though it is likely, in my opinion, that the clubs he’s playing are similar, if not the exact grinds, to what he was playing previously, with a McLaren stamp on them.

Having said that, at best, it is a distraction when he seemed to be as dialed in with his game as any 45-year-old could be and trending in the majors to perhaps do something that would definitely put him in the Hall of Fame. At worst, given the possibility that these clubs aren’t just duplicates of his old set stamped with McLaren on them, he’s made an equipment change that would take time, and 45-year-old athletes don’t have the time to do such things.

Gianni: Aronimink has only hosted a handful of professional events since it hosted the 1962 PGA Championship. What kind of test does it present, and does a course with less recent major championship history tend to level the playing field?

Brandel: Even though Aronimink has only hosted a handful of meaningful professional events, it has been fairly discerning in who can win there. When Keegan Bradley won the BMW Championship on the Donald Ross masterpiece in 2018, he was the 2nd best iron player on tour coming into that week. When Nick Watney won the AT&T at Aronimink in 2011, he was 2nd in strokes gained total coming into the week.

In 2020, Aronimink hosted the KPMG Championship, and Sei Young Kim won. On the LPGA that year, she was first in greens in regulation, putts per green in regulation, and scoring average on the way to being the LPGA player of the year. And then there is the 1962 PGA Championship won by Gary Player, who eventually became just one of a few players to win the career grand slam on the way to winning 9 majors. It is a formidable test, and if it’s not softened by rain, it will bring out the best in the upper echelons of the game.

Gianni: Is there a specific hole at Aronimink that you think will do the most to decide the winner?

Brandel: The hardest hole at Aronimink in each of the three tour events that have been played there since 2010 has been the long par-3 8th hole, with the par-4 10th being the second hardest, so most of the carnage will happen around the turn, but with the par-5 16th offering opportunities for bold plays and the tough closing holes at 17 and 18, the finish is likely to be frenetic.

Gianni: The PGA Championship has always sat in the shadow of the other majors. What does the ideal PGA Championship look like in your eyes, and what would it take for it to carve out its own identity?

Brandel: The PGA Championship, to whatever degree it suffers from the comparison to the other three majors, is still counted just as much when adding them up at the end of one’s career. Almost 1/3 of Nicklaus’ major wins were the five PGA Championships he won. Walter Hagen won 11 majors, five of which were PGA Championships.

Tiger Woods twice in his career won back-to-back PGA Championships, and those four majors count just as much as the other 11 he won. The PGA may not have the prestige of the other three, but it carries the same weight. Having said that, I preferred the identity that it had as the last major of the year.

Gianni: You nailed your Masters picks. Rory won, Scottie finished solo second, and Morikawa surged to a tie for seventh. Who are your top 3 picks for the PGA Championship and why?

Brandel: I am not a huge fan of majors played on golf courses that have been shorn of most of the trees, although I understand some of the agronomic reasons for doing so and of course the ease with which it allows members to play after errant drives. However, at the highest level, it all but eliminates any strategy off the tee and turns professional golf into an even bigger slugfest. That means that it will likely be a bomber’s delight this week, but fortunately, Scottie Scheffler is long enough to play that game and straight enough to play it better than anyone else.

The major championships give us very few surprises anymore, going back to the beginning of 2012, so the last 57 majors played, the average world rank of the winners has been better than 15th in the world. So look at the highest ranked and longest drivers who are on form coming into the PGA Championship who also have great short games as the surrounds at Aronimink are very challenging. That’s Scottie Scheffler by a mile and then McIlroy and Cameron Young with a far bigger nod towards DeChambeau than I gave him at the Masters.

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Club Junkie

A putter that I love and hate – Club Junkie Podcast

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In this episode of the Club Junkie Podcast, we dive into one of the most interesting flatstick releases of the year with a full review of the new TaylorMade SYSTM 2 putters. After spending time on the greens, I break down what makes this design stand out, where it performs, and why it has me completely torn between loving it and fighting it. If you are into feel, alignment, and consistency, this is one you will want to hear about.

We also take a look at some of the putters in play on the PGA Tour last week. From familiar favorites to a few surprising setups, there is always something to learn from what the best players in the world are rolling with under pressure.

To wrap things up, I walk through the process of building a set of JP Golf Prime irons paired with Baddazz Gold Series shafts. From component selection to performance goals, this is a deep dive into what goes into creating a unique custom set and why this combo has been so intriguing.

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Opinion & Analysis

From 14 handicap to pro: 4 things I’d tell golfers at 50

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This year my 50th birthday. Gosh, where has the time gone?

As a teenager in rural Missouri, some of my junior high and high school years felt interminable. Graduation seemed light years away. But the older I get, the faster life seems to fly by.

I’m also increasingly aware of my mortality. My dad died recently. Earlier this year, a friend and fellow PGA of America professional and I were texting about our next catch-up. The next message I received was news of his unexpected passing at 48. Shortly after, a woman I dated in college succumbed to cancer at 51.

Certainly, one can share perspective at any age. Seniors help freshmen, veterans guide rookies. But reaching this milestone feels like as good a time as any to do one of those “what would I tell my younger self?” articles.

I’ve had a uniquely varied career in golf. I started as a 27-year-old, average-length-hitting, 14-handicap computer engineer and somehow managed to turn pro before running out of money, constantly bootstrapping my way forward. I’ve won qualifiers and set venue records in the World Long Drive Championships, finished fifth at the Speedgolf World Championships, coached all skill levels as a PGA of America professional, built industry-leading swing speed training programs for Swing Man Golf, helped advance the single-length iron market with Sterling Irons®, caddied on the PGA TOUR and PGA TOUR Champions, and played about 300 courses across 32 countries.

It’s been a ride, and I’ve gone both deep and wide.

So while I can consult and advise from a lot of angles, let me keep it to a few things I’d tell the average golfer who wants to improve.

1. Think About What You Want

Everyone has their own reason for picking up a golf club.

Oddly, as a professional athlete, I’m not internally driven by competition. That can be challenging, as the industry currently prioritizes and incentivizes competition over the love of the game.

For me, I love walking and being outdoors. Nature helps balance my energy. I prefer courses that are integrated into the natural beauty of their surroundings. I’m comfortable practicing alone. I’m a deep thinker, and I genuinely enjoy investigating the game, using data and intuition to unearth unique, often innovative insights. I’m fortunate to be strong and athletic, so I appreciate the chance to engage with my abilities. Traveling feels adventurous. I could go on.

You don’t have to overthink it like I do. For you, it might be as simple as hitting balls to escape work, hanging out with friends, and playing loosely with the rules and the score.

The point is to give yourself permission to play for your own reasons, and let that be enough.

But if improvement is your goal, thinking about your destination—and when you want to get there—is important, because it dictates the steps you need to take. When I set out to go from a 14-handicap to the PGA TOUR as quickly as possible, the steps I needed were very different from those of a working golfer trying to break 90 in six months. That’s also different from someone who just wants a few peaceful hours outside each week, away from work or family.

None of these goals are better than the others, but each requires a different plan that you can work backward from.

2. There Are Lots of Things That Can Work

One of the challenges of golf is that, although there are rules for playing, there aren’t clear, industry-wide standards for how to best play the game. There’s a lot of gray area.

You might hear a top coach or trainer insist that a certain move is the best way to swing or train. Then you dig a bit deeper and, much to your confusion and frustration, another respected coach or trainer says something completely different. I don’t think anyone is trying to confuse you—at least I hope not. It’s just where the industry is right now.

You have to be careful with advice from tournament pros, too. They might be great at scoring, but they’re also human and sometimes just as susceptible as amateurs to believing things that don’t really move the needle. Tour players might describe what they feel, but that’s not always what they’re actually doing when assessed with technology.

I recently ran a test on my YouTube channel (which connects to my GolfWRX article “How to use your hands in the golf swing for power and accuracy”), and, interestingly, two of the most commonly taught hand actions produced the worst results in the test.

Coaches can certainly help. If you find someone you connect with to help navigate, that’s great. But there are many ways to get the ball in the hole. In the current landscape, you may need to seek multiple opinions, think critically, and use your own intuition to discern what seems true and whose advice resonates with you.

I’d recommend seeking someone who is open-minded and always learning, because things constantly change. Absolutes like “correct” or “proper” should raise a red flag. AI can be useful, but it tends to confidently repeat popular advice, so proceed with caution.

3. Get Custom Fit

If you’re serious about becoming a better player, getting custom fit is hugely important. There’s no sense fighting your equipment if you don’t have to. Most better players get fit these days and, if they don’t, they’re usually skilled enough to work around clubs that aren’t ideal.

If you plan to play for a long time, it’s worth spending a little more upfront to get something that truly fits you and your game, rather than continually buying and discarding equipment.

Equipment rules haven’t really changed significantly since the early 2000s. To stay in business, manufacturers keep pushing those limits. If you pull a bunch of clubs and balls off the rack and test them, you’ll find differences. I’ve tested two new drivers and seen a 30-yard total distance gap. Usually, the issue isn’t bad equipment; it’s that the combination of components simply isn’t the best fit.

It’s like wearing a new pair of floppy clown shoes. Sure, they’re shoes—but you won’t sprint your best in them compared to track shoes that fit perfectly.

Be wary of what’s called custom fitting, too. Sometimes the term is used as a marketing strategy rather than an actual fitting. In some retail settings, fitters may be incentivized to steer you toward higher-priced components. That doesn’t automatically mean it’s not the best fit, but you should be aware of potential biases.

I learned a version of this lesson outside of golf. Years ago, I bought a tennis racquet at a big box store from a seemingly knowledgeable employee who thought it would suit me best. The racquet gave me tennis elbow, and I spent months recovering with rest and acupuncture. The next season, I invested more time and money to find what actually fit me, and I walked away with something amazing that I still play with years later.

So if you’re going to get fit, be smart about it.

Find someone you believe has deep knowledge—possibly with certifications, but not necessarily. Make sure there’s a wide inventory across many brands. Check recent reviews for the individual fitter if possible. Make sure you trust that the fitter has your best interests at heart. If they’re wearing a hat or shirt with a specific brand’s logo, proceed with caution. Unless you specifically want a certain brand or look, be wary of upsells, especially if two options perform nearly the same.

Also, while golf is called a sport of integrity, there’s a thread of manipulation in the industry. I once drafted an equipment article for an industry magazine, structured just like one of their previous popular stories, with matching word count and great photos. The assistant editor loved it; it was useful to readers and required little work on his part. But the editor-in-chief nixed the story. When I asked why, I was told it was because I wasn’t an advertiser. It turned out the article I’d modeled mine after was a paid ad cleverly disguised as editorial content.

I really dislike games, clickbait, and fear-based manipulation. I hope this changes, but golfers deserve to know it exists.

4. Distance and Strategy Matter

There’s a real relationship between how far you hit the ball and your scoring average, even at the PGA TOUR level.

I experienced this early in my pro career. I started as a power hitter, swinging in the high 120s and breaking 200 mph ball speed with a stock driver.

Back then, some instructors advised swinging at 80%, so I tried slowing down for more accuracy. That worked fine on shorter, tighter courses. But on longer setups, I was coming into greens with too much club, and par 5s stopped being

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