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Effect of a driver shaft that is too stiff ?


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With my swing speed, it's always recommended that I play REGULAR flex.    I have a driver with stiff flex that I like, but it has this weird tendency unlike any of my other regular flex drivers to push to the right (not slice, just a straight push) ... consistently, sometimes badly to the point of flying OB straight right on an otherwise nice solid hit.

I know there are alot of variables (maybe it has less offset than my other drivers), but can someone verify in general terms if this is a common symptom of using a shaft that is too stiff ??

Thx.

John

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With my swing speed, it's always recommended that I play REGULAR flex.    I have a driver with stiff flex that I like, but it has this weird tendency unlike any of my other regular flex drivers to push to the right (not slice, just a straight push) ... consistently, sometimes badly to the point of flying OB straight right on an otherwise nice solid hit.

I know there are alot of variables (maybe it has less offset than my other drivers), but can someone verify in general terms if this is a common symptom of using a shaft that is too stiff ??

Thx.

Define regular flex?  I could easily say that a 50 gram shaft in one brand labeled regular flex might have the same stiffness as a seniors flex in a 70 gram shaft in a completely different model which would be labeled regular flex. There is no standard for flex. So going by swing speed = this flex is just a vague guess. In the end, trial and error with a launch monitor is the best way to get fit for a club.

Some shaft companies put an online fitter. Some actually ask what your tempo is or how you transition the club. So some of those are pretty good at getting you really close to the shaft that might work best for you.

As for your swing my best guess is your swing is adjusting to how the club bends during the swing and it is causing you to produce a block. Though a block is more of a path issue, I would recommend at least making sure your swing it self doesn't have an issue.

This is from Tom Wishon a pretty knowledgeable guy in club fitting,

Shaft Myth #8 – The higher the clubhead speed of the golfer, the stiffer the shaft should be

There are two reasons this is frequently not true. First, as we said previously, with no standards in the golf industry for shaft flex, there are very definitely a lot of R flex shafts that are stiffer than a lot of S flex and even X flex shafts. So it can be very possible for a golfer with a certain clubhead speed to be properly fit with an S flex in one company’s shaft model, but to find that another company’s R flex may in fact be stiffer.

The second and main reason this statement is frequently not true is because clubhead speed is not the main element in the swing that determines how much a golfer actually bends a shaft during the swing. The swing element that applies the chief amount of bending force to a shaft is the golfer’s transition move to start the downswing. Among two golfers with the same clubhead speed, it can be very common for one golfer to have a short backswing with a very forceful, abrupt and sudden acceleration to start the downswing, while the other golfer might start the downswing with a much smoother, more gradual acceleration of the club.

Among two golfers with the same clubhead speed, the one with the stronger, more forceful transition move will always put more bending force on the shaft, and from it, will typically need a stiffer shaft than the golfer with the same swing speed who has a smooth, gradual acceleration of the club during the downswing. It is also not uncommon to see a golfer with a slower swing speed and stronger transition as well as a golfer with a higher swing speed and smoother transition move. In such a case, the slower swinging golfer with stronger transition would need a stiffer shaft than the golfer with a higher clubhead speed but smoother, less forceful transition move.

The bottom line is that while clubhead speed definitely offers a starting point for flex selection, the most accurate shaft fitting involves a careful evaluation of the other swing movements that have a direct effect on how much the shaft is flexed during the swing.

Matt Dougherty, P.E.
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Wow, neither one of you guys answered the OP's question. I would like to know the answer myself. Regardless of variation among manufacturers and what the ideal stiffness for your swing would be, what is the effect of swinging a shaft that is too stiff for you?

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He did answer the question. Not all stiff shafts are the same and not all regular flex shafts are the same. There's no standard for a flex. Each manufacturer has their own stiff. It's like asking someone to tell you what color red to paint your car. Some people notice a difference between a regular flex and a stiff. I personally think it's mostly mental. I hit my buddy's x hot 3w probably 50 times at the range to see if I wanted one. Well after I feel in love with it he told me it was a regular flex. I didn't look and I would have never known if he didn't tell me. I swing a but faster than he does but he usually has played stiff so I just assumed that's what he got. I bought a x 2 hot with a stiff because I've always played stiff. I don't hit it any better than I hit his it's just what I prefer but it doesn't preform noticeably better.
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Wow, neither one of you guys answered the OP's question. I would like to know the answer myself. Regardless of variation among manufacturers and what the ideal stiffness for your swing would be, what is the effect of swinging a shaft that is too stiff for you?

I think the general symptoms of a too stiff flex is a lower flight and shorter distance. There are just too many variables (weight, kick point, head weight, swing weight, etc.) to really be conclusive when the stiffness is close to your needs.

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He did answer the question. Not all stiff shafts are the same and not all regular flex shafts are the same. There's no standard for a flex. Each manufacturer has their own stiff. It's like asking someone to tell you what color red to paint your car. Some people notice a difference between a regular flex and a stiff. I personally think it's mostly mental. I hit my buddy's x hot 3w probably 50 times at the range to see if I wanted one. Well after I feel in love with it he told me it was a regular flex. I didn't look and I would have never known if he didn't tell me. I swing a but faster than he does but he usually has played stiff so I just assumed that's what he got. I bought a x 2 hot with a stiff because I've always played stiff. I don't hit it any better than I hit his it's just what I prefer but it doesn't preform noticeably better.

Let me ask a bit differently: Let's say I put some standard-stiffness driver into a golf swinging robot and it his perfect drives. Straight, 0 path, 0 face angle, 300 yards. Now I tweak the stiffness of that driver to make it whatever the maximum stiffness is that players might use. What might be the characteristics at impact now, assuming the same swing?

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Let me ask a bit differently:

Let's say I put some standard-stiffness driver into a golf swinging robot and it his perfect drives. Straight, 0 path, 0 face angle, 300 yards.

Now I tweak the stiffness of that driver to make it whatever the maximum stiffness is that players might use. What might be the characteristics at impact now, assuming the same swing?

He did answer the question. Not all stiff shafts are the same and not all regular flex shafts are the same. There's no standard for a flex. Each manufacturer has their own stiff. It's like asking someone to tell you what color red to paint your car. Some people notice a difference between a regular flex and a stiff. I personally think it's mostly mental. I hit my buddy's x hot 3w probably 50 times at the range to see if I wanted one. Well after I feel in love with it he told me it was a regular flex. I didn't look and I would have never known if he didn't tell me. I swing a but faster than he does but he usually has played stiff so I just assumed that's what he got. I bought a x 2 hot with a stiff because I've always played stiff. I don't hit it any better than I hit his it's just what I prefer but it doesn't preform noticeably better.

No he didn't and neither did you. See quote above. ALL OTHER THING BEING EQUAL, what effect does a stiffer shaft have on a golf shot?

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I think the general symptoms of a too stiff flex is a lower flight and shorter distance. There are just too many variables (weight, kick point, head weight, swing weight, etc.) to really be conclusive when the stiffness is close to your needs.

Thank you.

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No he didn't and neither did you. See quote above. ALL OTHER THING BEING EQUAL, what effect does a stiffer shaft have on a golf shot?

Can you tell me when a person (not a robot ) has all other things equal? Professional golfer tweak lofts, lies, shafts, ect... and their swings are much closer to BEING EQUAL than ours are. If you can deliver the club the same every time and hit the ball out of the center of the face every time I'd say it's time to start worrying about shafts. Until your close to that worry about having a more consistent swing. That's my opinion.

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I think the general ASSUMPTION of a too stiff flex is a lower flight and shorter distance. There are just too many variables (weight, kick point, head weight, swing weight, etc.) to really be conclusive when the stiffness is close to your needs.

Fixed that for you. :whistle:

The primary thing a golfer wants to do is optimize launch conditions. The main factors are from the golfer, and how they react to the different golf shaft.

Let me ask a bit differently:

Let's say I put some standard-stiffness driver into a golf swinging robot and it his perfect drives. Straight, 0 path, 0 face angle, 300 yards.

To my knowledge there has never been a test done on it before. Generally speaking, I would say you would loose yards because the club is not fit for the swing speed.

As for path, generally a less tiff shaft should be more drupe. So the club is probably more flat at impact, or toe down. Maybe a few degrees, but in a driver that isn't that important. There isn't enough loft for the lie angle to effect the ball significantly. I would guess maybe 1.5 yards right if I did the math right from this thread.

http://thesandtrap.com/t/64131/effects-of-lie-angle-on-varying-degrees-of-loft (Beware, not for those who despise math :-P )

Given I have no clue how the face angle changes with flex. The Torque of the club has some to do with that as well.

For a launch angle, I would guess it would launch higher. Most charts show that more flexible golf shafts launch higher. So I would presume they add to the dynamic loft. As for how much, no clue.

So to answer your question, what general changes would you see if a Robot hit the two clubs,

Club Head Speed: N/A

Ball Speed: N/A

Dyanamic Loft: Probably higher, but no numerical answer.

Spin: N/A

Yards: N/A

Dispersion: N/A

Face Angle: N/A

I would like to see this study done with a Robot, but I would be it wouldn't be significant compared to how a person adapts to the change with their own swing.

No he didn't and neither did you. See quote above. ALL OTHER THING BEING EQUAL, what effect does a stiffer shaft have on a golf shot?

Depends on the golfer. You can take a robot, and say the results are this. That does not mean that is what happens in a normal golf swing. The human condition is to figure out contact and optimal flight by making small adjustments in the swing with the body.

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Matt Dougherty, P.E.
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Now I tweak the stiffness of that driver to make it whatever the maximum stiffness is that players might use. What might be the characteristics at impact now, assuming the same swing?

Is the golfer aware of the change? ;-)

No he didn't and neither did you. See quote above. ALL OTHER THING BEING EQUAL, what effect does a stiffer shaft have on a golf shot?

It's not an easy question to answer but typically a shaft that is too stiff for the player will launch lower, tend to start a little more right and fly shorter. Contact could also be less consistent, more off center hits.

Mike McLoughlin

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Is the golfer aware of the change?

It's not an easy question to answer but typically a shaft that is too stiff for the player will launch lower, tend to start a little more right and fly shorter. Contact could also be less consistent, more off center hits.

I would say those tendencies are very small for majority of flex changes, especially in one brand/model. Example if you take a Diamana Blue 70 gram shaft and go from an X-stiff to a Regular flex. You won't see a significant change in the characteristics lets say you go from Blue Board regular flex to D+ White x-stiff.

Well unless you get into clubs that change the bend profile with in the make/model. Like True Temper for iron shafts. Most golf shafts keep the same bend profile, but just adjust the stiffness by weight.

Matt Dougherty, P.E.
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What's in My Bag
Driver; :pxg: 0311 Gen 5,  3-Wood: 
:titleist: 917h3 ,  Hybrid:  :titleist: 915 2-Hybrid,  Irons: Sub 70 TAIII Fordged
Wedges: :edel: (52, 56, 60),  Putter: :edel:,  Ball: :snell: MTB,  Shoe: :true_linkswear:,  Rangfinder: :leupold:
Bag: :ping:

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I would say stiffer flex do have a tenancy to go right, possible the torque release as the hands rotate through. Grip thickness is another major factor. Thin encourages a hook, so check this also.
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Can you tell me when a person (not a robot ) has all other things equal? Professional golfer tweak lofts, lies, shafts, ect... and their swings are much closer to BEING EQUAL than ours are. If you can deliver the club the same every time and hit the ball out of the center of the face every time I'd say it's time to start worrying about shafts. Until your close to that worry about having a more consistent swing. That's my opinion.

Obtuse much?

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  • 2 weeks later...
With my swing speed, it's always recommended that I play REGULAR flex.    I have a driver with stiff flex that I like, but it has this weird tendency unlike any of my other regular flex drivers to push to the right (not slice, just a straight push) ... consistently, sometimes badly to the point of flying OB straight right on an otherwise nice solid hit. I know there are alot of variables (maybe it has less offset than my other drivers), but can someone verify in general terms if this is a common symptom of using a shaft that is too stiff ?? Thx.

I don't think that the shaft flex would cause a severe push like the one you describe. My guess would be that the appearance of the club head (face angle too open or closed) is causing you to line up incorrectly or maybe the overall weight of the club is too heavy for your swing.

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I bet too stiff wont load, unload and droop properly. If you can manage to close the face square, the toe wont droop and will be up in a face left condition instead of open for those not closing.

Tom R.

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Having read all the contributions, I am still not clear. I have exactly the same problem, and always assumed it was due to the shaft not being stiff enough, my logic being that the shaft is still bent at the moment of impact and therefore starts off right. I thought that getting a stiffer shaft fitted would help (I am 6'6" tall and my swing speed is just under 100 mph). If this logic is wrong, can somebody please explain why?

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