Connect with us



Shaft flex is one of those topics that can be quite confusing for many golfers. It seems that there are as many opinions on the topic as there are different shafts. Does shaft flex really matter? We wanted to approach the question a little bit differently.

In this video, we explain how the shaft in your driver can either be helping or hurting one key element of your drives.

Your Reaction?
  • 74
  • LEGIT11
  • WOW5
  • LOL2
  • IDHT5
  • FLOP5
  • OB2
  • SHANK36

Athletic Motion Golf is a collaboration of four of golf's brightest and most talented instructors who came together with the sole purpose of supplying golfers the very best information and strategies to lower their scores. At AMG, we're bringing fact-based instruction that's backed by research and proven at the highest levels on the PGA Tour straight to golfers through our website. Our resources will help you "clear the fog" in your game and understand the essentials of playing great golf.



  1. Dr. Golf

    Feb 13, 2018 at 7:00 pm

    Seven Dreams $1200 autoclave cured driver shafts are superior to the oven cured shafts because they suck out the excessive epoxy plastic that causes graphite shafts to be floppy and soggy in tip dynamic action and recovery.
    Steel shafts are still the gold standard for shaft consistency. Soon the debates about current graphite shafts will be moot as they are made obsolete by Seven Dreams graphite shafts.

  2. Adam

    Feb 12, 2018 at 1:17 pm

    A little defined problem has to do with the radial consistency of a shaft. I would never use one that varies more than 1% hard to soft plane. Yet, I have wondered, even if I position the head so that it moves exactly along the soft plane at impact, it moved through other planes on its way to impact. So, the head is twisting and turning in odd ways before impact. That can’t be good.

    • AMG

      Feb 12, 2018 at 8:08 pm

      You’re right on the money, it’s not bending in a consistent plane. Not comforting, lol

    • Dr. Golf

      Feb 13, 2018 at 6:53 pm

      The radial consistency of steel shafts is uniform, whereas it’s all over the place for floppy soggy graphite shafts…. all because of the excessive epoxy plastic and arbitrary layering that compromises radial action.
      $1200 Seven Dreams autoclave cured graphite shafts has superior radial consistency when compare to all the oven-cured shafts on the market now.

  3. Josh

    Feb 12, 2018 at 12:50 pm

    The video achieved what it was meant to. It showed us that the shaft is not straight at impact, and flex has an effect on speed. We learned that having the right flex matters. The question posed, “Does shaft flex make a difference?” was answered. Thank you AMG.

  4. Joro

    Feb 12, 2018 at 12:46 pm

    Having been in this business for over 60 yrs as a player, club maker and repairman, plus teaching I have found out no, not as much as the ego thinks.. Weight, flex, and length are not that much, of course the difference tween xx and R or reg.. is there, but between X and S, not much and of course the heavier the stiffer also. Knowing shafts, what the do and why is complicated, but not that difficult.

    Now Graphite is a different matter because there are not standards, one makers reg flex is another makers s and it has to be tried to be sure you get what you want. Weight is also a bug factor that too light can be too fast and hard to control. So with Graphite you have to careful and get fitted, although the shaft you hit well may not be the same they put in your clubs. Like I said, it varies and not as consistent as steel, and that is just part of it.

    • AMG

      Feb 12, 2018 at 7:14 pm

      Great points, Joro. Always good to leave the fitting with what you just hit the best.

  5. joe virdone

    Feb 12, 2018 at 11:59 am

    What were the clubhead speeds for the reg, stuff and X stiff demos…thanks.

  6. Reeves

    Feb 12, 2018 at 1:03 am

    I find at my level (15) that shaft flex can make a lot of difference..went from stiff metal iron shafts to regular iron shaft (same brand on Ping irons) can now get 4 and 5 irons up in the air…also with the driver I went from a regular graphite shaft to a tour stiff (Wilson Triton driver) and picked up 20 yards and a small draw where the regular shaft was a constant baby fade….

  7. TeeBone

    Feb 10, 2018 at 11:24 am

    I would like to have seen the final clubhead speed at impact numbers. There is other research that found that shaft flex had no significant impact on clubhead speed. Isn’t it possible to have different kick speeds with the same total speed?

    • AMG

      Feb 10, 2018 at 4:10 pm

      We posted the final head speeds in the comments section of the video. I don’t recall exactly what they were, but they’re in the comments if you’d like to see them.

      Do you have a link you could share for that research? Would like to see how they did their tests.

      I don’t think it would be possible to only vary kick speed while keeping total head speed the same. It would be possible to do if the other variables changed. BUT… we haven’t tested it, just a hunch.

      • TeeBone

        Feb 11, 2018 at 11:37 am

        Sasho MacKenzie has several papers on this. See also Milne and Davis. And David Williams’ book. And probably others as well.

  8. CB

    Feb 10, 2018 at 9:13 am

    Really informative stuff! Very clearly explained and simplified for anybody to understand. Thank you very much!

  9. JE

    Feb 10, 2018 at 6:00 am

    Damn interesting stuff. Thank you!

  10. Chris

    Feb 9, 2018 at 10:28 pm

    If I knew nothing about golf and was trying to learn, this video would tell me that if I wanted to not lose Club Head speed with my 86mph driver swing, I need an x flex shaft.

  11. OB

    Feb 9, 2018 at 3:44 pm

    True Temper scientist-engineers determined three distinct shaft loading profiles. Double peak, single peak and ramp-up swing-shaft loading. TT designed 5-iron and driver devices that monitored the stresses in the shaft, called ShaftLab. It worked well until one of the many internal load sensors failed and it malfunctioned. It was discontinued.
    Nevertheless, ShaftLab defined swing loading profiles and shaft recommendations. What is shown in the video is slightly visually misleading because what we see as “deflection” is actually shaft tip droop and tip torque.
    Face-on “dead straight” does not show full shaft droop and torque twist. What we see is the dynamic alignment of the shaft axis to the clubhead eccentric sweet spot location.
    Shaft stiffness and droop is a function of swing speed. The clubhead “whipsnaps” through final release and into impact. If your swing speed is too low and your shaft is too stiff, it won’t droop and the reaction forces into your hands and arms are excessive.
    95% of golfers worldwide should be playing a woman’s A-flex shaft to get adequate droop and whipsnap… something most golfers never feel because their swing isn’t synchronized to the dynamic action of the shaft tip section and clubhead.
    It’s also why Tour and LD players have problems with inconsistent soggy floppy epoxy plastic graphite shafts. Steel shafts have the most consistent flex dynamics.

    • AMG

      Feb 9, 2018 at 4:39 pm

      GEARS captures both shaft deflection and droop separately. We show both sets of numbers for each shaft looked at in the video. These are not tip numbers, but overall numbers from the length of the shaft. But because the tip is the softest section of the shaft, more movement happens the closer down the shaft you look.

      The purpose of this video was not to show anything other than shafts do not all produce the same results, and that shafts are not straight at impact.

      If you really want to take a deep dive into all things deflection, drooping, and torque you would love the info from Fujikura’s Enso system. There is nothing else out there like it.

    • george

      Feb 10, 2018 at 1:50 pm

      When then there is a golf shaft for irons and woods that eliminates droop, twist
      and kick at impact; why would we ask golfers to synchronize their golf swings to each shaft in their bag?

      More droop, more twist and more kick make it impossible to time a solid impact on sweet spot, consistently.
      When there isn’t a solid impact and ball flight is erratic, should the golfer change his swing or change his shaft or clubhead?
      Its no wonder so many golfers quit this game.

      Moe Norman and Ben Hogan would not play with ‘licorice’ sticks. No one should.

  12. farmer

    Feb 9, 2018 at 2:39 pm

    There is no baseline information, other than the LD swing. Would be more informative if it was done on an Iron Byron, and captioned by various SS’s. Does not take into account the different flex patterns in shafts. So, nicely produced, but worthless.

    • AMG

      Feb 9, 2018 at 4:47 pm

      The problem for us using Iron Byron type robotics is that we work with real golfers and are much more interested in the human variances/influences on equipment. The OEM’s do a great job going down the robot testing road, we’re more interested in how the equipment works in the hands of a wide skill range of actual golfers.

      We didn’t include the baseline info because it really wasn’t necessary to answer the questions of does shaft flex make a difference and are shafts straight at impact.

  13. Steg0726

    Feb 9, 2018 at 12:13 pm

    Knowing the swing speeds and the other variables that involve the shaft loading and unloading needs to be present. Maybe adding info from a GC quad or even mizuno shaft optimizer would give some outlook on swing tendencies. Adding shaft specs as well.

    • AMG

      Feb 9, 2018 at 4:52 pm

      That information would absolutely be necessary to match a golfer to an optimally fit shaft. The questions we wanted to answer with this short video were way less ambitious.

      Is there anything specifically regarding shafts that you’d like to see looked at?

      • george

        Feb 10, 2018 at 11:43 am

        I would like to see how much each type of shaft decelerates at impact (Newtons Third Law)

  14. Jeff

    Feb 9, 2018 at 11:03 am

    How much does the golfer/ swing speed etc affect the results. Is the golfer that is swinging the x flex shaft more efficient??
    Just curious how the golfer affected the results

    • Jack

      Feb 9, 2018 at 11:20 am

      different golfers, good/bad techniques, hard to come away with anything from this video

      • Skip

        Feb 9, 2018 at 11:53 am

        agreed. there’s too many variables to really come away with anything definitive. Is there an ideal reaction of the shaft? Watching this, this long drive guy should be playing the X-Flex instead of the XX?

        • george

          Feb 9, 2018 at 3:32 pm

          to eliminate some variables such as droop, kick, twist and gear effect
          at the same time, try /test Nunchuk shafts

          video at,

        • AMG

          Feb 9, 2018 at 5:10 pm

          I doubt he’d be happy playing the X flex.

          We weren’t attempting for optimally match shafts to swings – you’re right, the number of variables for that would be staggering. Instead, we wanted to show how shafts can and do perform differently (many believe they don’t) and that shafts are not straight rigid rods at impact.

          Most highly informed golfers are not aware of how much a shaft can or does add/reduces speed to the overall motion. We thought that would be interesting to show as well.

      • Dan

        Feb 9, 2018 at 4:59 pm

        Are we to assume it was the same person with each shaft? If so then the video makes sense, if not complete nonsense.

    • AMG

      Feb 9, 2018 at 5:02 pm

      Very difficult to define efficient, but all 4 golfers are excellent players in their own class of skill level.

      The golfer has a huge affect on any non-robot shaft testing. We have seen swing speeds from high 80’s all the way up produce both positive and negative kick speeds.

      It’s interesting watching golfers respond to different shafts with strong feelings of love/hate, but with next to no fluctuations in the actual data. A “good feeling” shaft often trumps everything.

Leave a Reply

Your email address will not be published. Required fields are marked *


Barnbougle Dunes: World Class Golf



We arrived to Launceston Airport in Tasmania just before sunset. Located on the Northeast Coast of Australia’s island state, Tasmania, Barnbougle is almost as far from Sweden as it gets… yet it immediately felt like home when we arrived.

Launceston Airport, Tasmania. (C) Jacob Sjöman.

The drive from the airport was just over an hour, taking us through deep forests and rolling hills before we arrived to Barnbougle Golf Resort, which consists of two courses — The Dunes and Lost Farm — a lodge, two restaurants, a sports bar and a spa. Unfortunately, it was pitch black outside and we couldn’t see much of the two courses on our arrival. I would like to add that both Johan and I were extremely excited about visiting this golf mecca. We later enjoyed a tasty dinner at the Barnbougle Lost Farm Restaurant before we called it a day.

The locals at Barnbougle Dunes. (C) Jacob Sjöman.

The next day, we woke up early and got out to The Dunes Course as very first guests out. Well, to be quite honest, we weren’t actually the first out. There were a few locals — Wallabies, lots of them — already out on the course. The natural landscape at Barnbougle is fantastic and my cameras almost overheated with the photo opportunities. After two intense hours of recording videos and producing photos both from ground, we headed back to Lost Farm for a wonderful breakfast (and view). After our breakfast, it was time to try our luck.

“Tom’s Little Devil.” Hole No.7 at Barnbougle Dunes. (C) Jacob Sjöman.

Before describing our experience playing the courses, I would like to mention about Richard Sattler, a potato farmer and owner of Barnbougle. In the early 2000’s, Richard was introduced to U.S. golfing visionary Mike Keiser, who had heard about his amazing stretch of farmland in Tasmania and came down to visit. Mike convinced Richard that Barnbougle (which at that stage was a potato farm and still grows potatoes and raises cattle today) might be perfect for creating a top quality golf course.

After an introduction to well renowned golf architect Tom Doak and the formation of a partnership with former Australian golf pro and golf architect Mike Clayton, the development of the Barnbougle Dunes Course commenced.

The walk between the 4th and 5th holes. (C) Jacob Sjöman.

Featuring large bunkers dotted between fun rolling fairways shaped from the coastal dunes, Barnbougle Dunes offers the golfer some tough challenges, in particular on the first nine. This is indeed a course that will entertain all kinds of golfers.

After our round, we looked back at some fantastic highlights such as playing the iconic 7th hole, a short par-3 called ”Tom’s Little Devil,” as well as the beautiful par-4 15th. We were just two big walking smiles sitting there in the restaurant to be honest. Lets also not forget one of the biggest (and deepest) bunkers I’ve seen at the 4th hole. The name of the bunker is “Jaws.” Good times!

As a small surprise for Johan, I had arranged a meeting after our round with Richard Sattler. Richard, ever the farmer, entered the car parking just in front of the clubhouse in a white pick-up van with a big smile un his face. We talked to Richard for almost 30 minutes. He is an extremely humble man and left such a warm impression on us. Richard explained the Barnbougle story: how it all began and the property today.

To me, this is a high-end golf destination offering something very unique with two world-class courses in Barnbougle Dunes and Barnbougle Lost Farm, both ranked in the top-100 greatest golf courses by Golf Digest and Golf Magazine (U.S.). With the courses located just next to each other, it’s probably one of the best golf resorts you can find down under and a golf resort that I would like bring my hardcore golfing friends to visit. Everything here is exceptional with the resort providing spacious rooms, comfy beds, good food and spectacular views.

(C) Jacob Sjöman.

Barnbougle Dunes is a real treat to play for any golfer and will leave you with a sweet golfing memory. Compared to the golf courses available on the more remote King Island, Barnbougle is accessible (given Tasmania is connected by better flight connections) and the hospitality and service at is much more refined.

The golf resort is one of the absolute best I’ve been to. I can also highly recommend playing Barnbougle Dunes; I had great fun and you can play it in many ways. Tomorrow, we will be playing and experiencing the other course at Barnbougle: Barnbougle Lost Farm, a Bill Coore/Ben Crenshaw course with 20 (!) holes.

Your Reaction?
  • 23
  • LEGIT0
  • WOW1
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK0

Continue Reading


Geoff Shackelford and Louis Oosthuizen join our 19th Hole podcast



Louis Oosthuizen and Geoff Shackelford join our 19th Hole this week. Oosthuizen talks about his prospects for the 2018 season, and Shackelford discusses Tiger’s setback at the 2018 Genesis Open. Also, host Michael Williams talks about the PGA Tour’s charitable efforts in the wake of tragic events in Parkland, Florida.

Listen to the podcast below on SoundCloud, or click here to listen on iTunes!

Your Reaction?
  • 3
  • LEGIT1
  • WOW0
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK5

Continue Reading

Opinion & Analysis

Fantasy Preview: 2018 Honda Classic



It’s off to Florida this week for the Honda Classic, as the lead up to the year’s first major continues. PGA National has been the permanent home of this event since 2007, and it has proved to be one of the most demanding courses on Tour since then. The golf course measures just under 7,200 yards, but it is the often blustery conditions combined with the copious amount of water hazards that make this event a challenge. There is also the added factor of “The Bear Trap,” a daunting stretch of holes (Nos. 15-17) that are arguably the most difficult run of holes we will see all year on the PGA Tour.

Ball strikers have excelled here in the past, with Adam Scott, Sergio Garcia and Rory McIlroy all boasting fine records at PGA National. The par-70 golf course contains six long Par 4’s that measure over 450 yards, and players will be hoping that the wind isn’t too strong — when it does blow here, the course can turn into a brute. Last year, Rickie Fowler posted 12-under par to win the event by four strokes over Morgan Hoffmann and Gary Woodland. It was the first time in the last five years that the winning score reached double digits.

Selected Tournament Odds (via Bet365)

  • Rickie Fowler 8/1
  • Rory McIlroy 10/1
  • Justin Thomas 11/1
  • Sergio Garcia 18/1
  • Tyrrell Hatton 28/1
  • Tommy Fleetwood 30/1
  • Gary Woodland 30/1

Previous champions Rickie Fowler and Rory McIlroy are sure to be popular picks this week, but it’s Justin Thomas (11/1, DK Price $11,300) who I feel offers slightly more value out of the front runners. Thomas has begun the year well, finishing in the top-25 in all four events he has played. The numbers show that his game is getting better all the time. His iron play has steadily improved, picking up more Strokes for Approaching the Green week by week. Last week he gained six strokes approaching the green at the Genesis Open, which was fourth in the field.

At the ball strikers’ paradise, Thomas fans will be glad to know that he ranks fourth in the field for Ball Striking over his last 12 rounds. He is also ranked fourth for Strokes Gained Approaching the Green and second in Strokes Gained Total. Comparatively, neither Fowler nor McIlroy rank inside the top-50 for ball striking and the top-40 for Strokes Gained Approaching the Green over the same period.

Thomas’ accuracy on his approaches has been sensational lately. He leads the field in Proximity to the Hole for his past 12 rounds, and on a golf course that contains many long par 4’s it should play into Justin’s hands, as he’s been on fire recently with his long irons. He is third in the field for Proximity on Approaches Between 175-200 yards, and second in the field for Approaches Over 200 yards in his last 12 rounds. Thomas has a mixed record at PGA National, with a T3 finish wedged in between two missed cuts, but I like the way his game has been steadily improving as the season has progressed. It feels like it’s time for the current PGA Champion to notch his first win of the year.

On a golf course where ball striking is so important, Chesson Hadley (55/1, DK Price $7,700) caught my eye immediately. The North Carolina native has been in inspired form so far in this wraparound season with four finishes already in the top-5. The way he is currently striking the ball, it wouldn’t be a major surprise to see him get his fifth this week. Hadley is No. 1 in the field for Strokes Gained Approaching the Green, Strokes Gained Tee-to-Green and Ball Striking, while he is No. 2 for Strokes Gained Total over his last 24 rounds.

Having taken last week off, Hadley returns to a golf course where he has finished in the Top-25 twice in his three visits. Yet there is a sense that this year he’ll be aiming even higher than that. Chesson is fifth in this field for Proximity to the Hole from 175-200 yards and fourth overall over the past 24 rounds. With that level of accuracy on such a tricky golf course, Hadley will be confident of putting himself in position to claim win No. 2.

My next pick was a slow sell, but with the number so high I couldn’t leave him out. Adam Scott (55/1, DK Price $7,700) has been struggling for some time now. He has slipped out of the World’s Top-50, changed his putter from the short putter to the long putter and back again over the winter break, and he doesn’t have a top-10 finish on the PGA Tour since the FedEx St. Jude Classic last summer. Despite all of this, I don’t feel Scott should be as high as 66/1 with some bookmakers on a golf course where he has excelled. To put it in perspective, Scott is the same price to win this week in a modest field as he is to win The Masters in April.

There are also signs that Scott blew off some of the rust last week in LA. The Australian was 12th in the field for Strokes Gained Approaching the Green, which indicates that things might slowly be coming around for a man who is known for his prodigious ball striking. Scott’s achilles heel is the flat stick, and I wouldn’t expect that to change this week. He’s been very poor on the greens for some time now, which must be incredibly frustrating for a man who gives himself so many looks at birdie. But average putters have performed well at PGA National in the past, where it seems that excellent ball striking is the key for having a good week. Scott won here in 2016, and on his two other visits to PGA National in the past five years he twice finished in the top-15. If he can continue to improve his iron play the way he has been, I feel he could forge his way into contention.

My long shot this week is Sean O’Hair (200/1, DK Price $6,800). The Texan hasn’t done much so far this year, but he is making cuts and he arrives at a course that seems to bring out the best in him. O’Hair has five top-25 finishes in his last seven appearances at PGA National, which includes a T11 at last year’s edition. At 200/1 and with a DK Price of as little as $6,800, there is little harm in taking a chance on him finding that form once more this week.

Recommended Plays

  • Justin Thomas 11/1, DK Price $11,300
  • Chesson Hadley 55/1, DK Price $7,700
  • Adam Scott 55/1, DK Price $7,700
  • Sean O’Hair 200/1, DK Price $6,800
Your Reaction?
  • 2
  • LEGIT1
  • WOW0
  • LOL0
  • IDHT0
  • FLOP0
  • OB0
  • SHANK3

Continue Reading