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Wiz Golf Shaft Match (Beta) - Frequently Asked Questions


Frequently Asked Questions

1) What is this shaft profile about?

The shaft profile is the distribution of the stiffness over the length of a shaft. Every shaft is measured for stiffness at 5" interval starting at 11" from the tip. The average of the first two points is designated the Tip Flex, the second group of three points is designated the Mid Flex and the last group of two points is designated the Butt Flex.

Individual swing characteristics will cause the shaft to bend in different amount and over different areas of the shaft causing the shaft to arrive at impact in a different bending position.

Properly matching a shaft profile to your swing characteristics is important with respect to accounting for the bending feel some golfers are able to perceive from the shaft. Tom Wishon highlighted that bending feel is a very important aspect of feedback from the shaft because it affects the golfer's psychological perception of the club. If the shaft feels good to the golfer, their swing will be more fluid and consistent. If the shaft feels poor to the golfer, the golfer may react by changing their swing as if in an effort to make the shaft feel good, and in the process make more swing errors which will contribute to poor shotmaking results.

2) Who invented this method of matching?

Jerry Hoefling Sr.
AGCP Master of Golf Club Technology
AGCP Level 10 Certified
AGCP Charter Member
AGCP Lifetime Member
Qualification Review Board
ClubDoctor's Golf

Jerry Hoefling has been building golf clubs since 1981. In 1983 he went to Level One Club Making School and Level Two Advanced School in 1984 at the GolfWorks with Tom Wishon as his teacher. 1993 brought Jerry to Advanced Shaft Fitting at Dynacraft where he furthered his Golf Club knowledge. He became an Advanced Professional Clubmaker of the PCS in 1999. A year later he was at Dynacraft once again and then followed that up in 2001 with clubmaking and club bending classes at Mitchell. In 2002 he became a Master at GolfWorks and was awarded Regional Club Maker of the Year by the PCS. With Rifle certification and being awarded the Elmore Just Award from the PCS in 2003, Mr. Hoefling was well on his way to becoming a Master of Golf Club Technology.

In 2004 he was awarded the International Club Maker of the Year Award from the PCS and soon after became a Charter Member of the AGCP with the first Roundtable event held in Branson, MO at Hoot Gibson’s place. 2008 brought him Black Gold certification from True Temper as well as becoming a Master of Golf Club Technology. Now a lifetime member of the AGCP and constantly active within chat forums and e-mails, Jerry shares his knowledge with any who will ask.

With the help from his son-in-law and a few others, Jerry came up with the BMT Software that is offered through the AGCP website. Since 2001, he has been profiling shafts with 454g weights. With aid from Glen Tortick, Bob Uebelhor, and Tom Wishon, Jerry has made the BMT Software a hot commodity amongst clubfitters.

3) Who uses this method of shafting fitting?

While we do not have the exact no of clubfitters using this methodology, but a good number of clubfitters in AGCP do.

4) How do I measure my swing speed?
There are a couple of ways to find your swing speed (a.k.a club head speed).

The most accurate way is to use a launch monitor like Trackman or Flightscope. For a comparison of these launch monitors, you may want to have a read on John Graham's post here. PGA Tour only uses Trackman to provide shot data on the circuit. This speak of the accuracy of the technology used.

The second way is to use a little device called the swing speed radar. Although there are some good reviews, we are a little doubtful of the accuracy of the device. If you have one, we would love to test it out side by side with the Trackman

The third way is to use the Suunto G6 watch.

5) How do I measure my tempo?

Tempo is the time taken from the start of the swing to impact. For clubfitting purpose, we use the "adjusted tempo". This is basically the downswing time multiplied by 4. Why 4? John Novosol in his research of tour players' tempo found the similarity between all the tour players; They all have the same tempo and that the ratio of upswing time to downswing time is 3 to 1.

The most accurate way to measure a golfer's tempo is to use a high frame rate camera. A good camera will be something like the Casio FH20 that is capable of capturing video at 1000 fps. But for our use, 210 fps will be more than sufficient. After the capture, you can then use any application that allows you to view the frame count and you will be able to workout the downswing time. The application we use at WizGolf is V1 Home. To calculate the downswing time, all you need is identify the start of the downswing (say, frame no 500) and at impact (say, frame no 560). Is the camera used is shooting at 210 fps, the downswing time will be 0.29 sec (60/210). Thus the adjusted tempo will be 1.14 sec

The second way is to use a little device called the swing speed radar. The version with tempo will present you with your tempo as well, but we are not certain of its accuracy.

The third way is to use the Suunto G6 watch.

6) How do I know where I start my release?

When you start your backswing, there is an angle that is created between your club shaft and your forearms. As you transition from the backswing to the downswing and start to swing down towards the ball you'll be unhinging your wrists and releasing the club through the golf ball. When the unhinging start, this is the start of the release location.

The only and most accurate way to identify where a golfer start his release is to use a high frame rate camera. A good camera will be something like the Casio FH20 that is capable of capturing video at 1000 fps. But for our use, 210 fps will be more than sufficient. The application we use at WizGolf is V1 Home.

The other way to estimate the release location is to use a swing trainer like Swing Rite. From the area where you hear the click, minus 2 o'clock, that is where you would have start your release.

The downswing usually happens in less then 0.3 sec. Never guess/trust your naked eye to see where the release starts.

7) How do I know what shaft weight should I be using?
A change in the total weight of the equipment will generally has effect on your swing speed and club path. These are general tendencies, there are golfers who swing fast with heaver shelf and vice versa. The only way to know how your body will react to the weight change is to test it out and use an accurate launch monitor to check for these data.
8) Can I use this system to match iron and wedge shafts?

No. This system is only good for drivers and woods.

9) Is matching the shaft to my swing the only important aspect?

No. The golf club is a system of components. This includes the head, the shaft, the grip and many other specifications, e.g. length, loft, swing weight/MOI etc etc. We believe all of the components of the club and how they work together are important.

Wishon in his clubfitting book, challenges that he is able to build a club which you can hit with credible result for both distance and accuracy using a very poor shaft for you to use. Conversely, he can use a shaft which you know from your experience is a very good fit for your swing and build a club that gives a poor shotmaking outcome that you will not want to hit the club more than one time.

Bottom line is all components must be matched to you and built to specifications that is best for you.

10) How accurate is this method of selecting shaft?

Clubfitters using this methods estimated it to be around 85-95% fit. The challenge is always about measuring those parameters accurately. This method of matching allows mechanics to produce, feel reproduce. There is always this 5-15% of people that fall outside the norms. This is what makes the world so interesting right?

11) What are the typical swing speed of the pros?

PGA Tour Professionals
Club Club Speed (mph) Attack Angle (deg) Ball Speed (mph) Smash Factor Verticl Launch (deg) Spin Rate (rpm) Max Height (yds) Land Angle (deg) Carry (yds)
Driver 112 -1.3 165 1.49 11.2 2685 31 39 269
3-wood 107 -2.9 158 1.48 9.2 3655 30 43 243
5-wood 103 -3.3 152 1.47 9.4 4350 31 47 230
Hybrid 15-18* 100 -3.3 146 1.46 10.2 4437 29 47 225
3 iron 98 -3.1 142 1.45 10.4 4630 27 46 212
4 iron 96 -3.4 137 1.43 11.0 4836 28 48 203
5 iron 94 -3.7 132 1.41 12.1 5361 31 49 194
6 iron 92 -4.1 127 1.38 14.1 6231 30 50 183
7 iron 90 -4.3 120 1.33 16.3 7097 32 50 172
8 iron 87 -4.5 115 1.32 18.1 7998 31 50 160
9 iron 85 -4.7 109 1.28 20.4 8647 30 51 148
PW 83 -5.0 102 1.23 24.2 9304 29 52 136

LPGA Tour Professionals
Club Club Speed (mph) Attack Angle (deg) Ball Speed (mph) Smash Factor Verticl Launch (deg) Spin Rate (rpm) Max Height (yds) Land Angle (deg) Carry (yds)
Driver 94 3.0 139 1.47 14.0 2628 25 36 220
3-wood 90 -0.9 132 1.47 11.2 2705 23 39 195
5-wood 88 -1.8 128 1.47 12.2 4501 26 43 185
7-wood 85 -3.0 123 1.45 1.7 4693 25 46 174
4 iron 80 -1.7 116 1.45 14.3 4801 24 43 169
5 iron 79 -1.9 112 1.42 14.8 5081 23 45 161
6 iron 78 -2.3 109 1.39 17.1 5943 25 46 152
7 iron 76 -2.3 104 1.37 19.0 6699 26 47 141
8 iron 74 -3.1 100 1.35 20.8 7494 25 47 130
9 iron 72 -3.1 93 1.28 23.9 7589 26 47 119
PW 70 -2.8 86 1.23 25.6 8403 23 48 107

Courtesy of Trackman

12) What are the tempo and rhythm of tour pros?
Average 1.07 0.25 0.81 0.26      
Firstname Lastname Tempo Rhythm Backswing in sec Downswing in sec Notes USPGA ranking in Sep 2005 EUPGA ranking in Sep 2005
Annika Sorenstam 0.90 25.9% 0.67 0.23 female 1 1
Tiger Woods 107 25.0% 0.80 0.27 2002 1 99
Tiger Woods 1.20 25.0% 0.90 0.30 1997 1 99
Se Ri Pak 1.33 22.5% 1.03 0.30   2 99
Vikay Singh 1.10 27.3% 0.80 0.30 righthanded 2 13
Vikay Singh 1.00 30.0% 0.70 0.30 lefthanded 2 13
Ernie Els 1.10 27.3% 0.80 0.30   3 9
Phil Mickelson 1.07 25.0% 0.80 0.27   4 99
Sergio Garcia 1.07 21.9% 0.83 0.23   6 11
Jim Furyk 1.20 25.0% 0.90 0.30   8 99
Padraig Harrington 1.10 24.2% 0.83 0.27   9 46
David Toms 1.17 25.7% 0.87 030   10 99

Source : suunto.com

13) Why do I need to sign up?
Creating login account will allow us to personalize the application for the individual for a better usage experience. Feature like "Exclude brands" will filter them out for easy of comparison and also avoid information overload.
14) What is CPM?
CPM stands for Cycle Per Minute. It is a stiffness measurement of the shaft. This provides a more quantitative measurement compared to designation like R or S. There is really no (agreed) standard between shaft companies of what make a R, S or X. This is also the reason why when you do a match, you may have a A, R or even S flex shafts in the recommendation. But they all measure to the same stiffness (CPM).

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