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Does Adding an Inch to an Iron Shaft Affect Flex?


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#1 Sean2

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Posted 24 November 2010 - 12:33 AM

The topic says it all. :-)

Thanks!

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#2 chri55

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Posted 24 November 2010 - 01:38 AM

yes

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#3 jmvargas

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Posted 24 November 2010 - 02:12 AM

it will definitely make it more flexible assuming clubhead weight remains the same.....
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#4 Bobbers

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Posted 24 November 2010 - 10:05 AM

What shaft and flex are you planning to extend by an inch?  And have you considered the added swingweight you'll experience?  Just an 'fyi', you can take a manageable club and make it tough to hit depending on your swing style and speed.  Not trying to talk you out of it, just wonderin'.

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#5 QuickFeet

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Posted 24 November 2010 - 11:22 AM

Actually no, adding 1 inch to the butt will not change the flex profile anywhere along the shaft.

You might feel that the shaft flex has changed (a bit softer in the tip) since you've moved the head weight away from your hands; the swing weight number will change but that really doesn't mean anything.  You are still swinging the same head weight.

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#6 I_HATE_SNOW

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Posted 24 November 2010 - 11:51 AM

Yes, that head is now 1 inch further away, gives it more leverage on you.

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#7 mac94

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Posted 24 November 2010 - 12:10 PM

View PostQuickFeet, on 24 November 2010 - 11:22 AM, said:

Actually no, adding 1 inch to the butt will not change the flex profile anywhere along the shaft.

You might feel that the shaft flex has changed (a bit softer in the tip) since you've moved the head weight away from your hands; the swing weight number will change but that really doesn't mean anything.  You are still swinging the same head weight.

It most certainly does affect cpm.

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#8 QuickFeet

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Posted 24 November 2010 - 12:21 PM

View Postmac94, on 24 November 2010 - 12:10 PM, said:

View PostQuickFeet, on 24 November 2010 - 11:22 AM, said:

Actually no, adding 1 inch to the butt will not change the flex profile anywhere along the shaft.

You might feel that the shaft flex has changed (a bit softer in the tip) since you've moved the head weight away from your hands; the swing weight number will change but that really doesn't mean anything.  You are still swinging the same head weight.

It most certainly does affect cpm.

Of course it will because you have now change the clamp point on the CPM machine by 1 inch, it should cycle differently.  However the flex profile at any given point along the shaft, ie; 3 inches from the tip, won't change.  Actually if you add 1 inch and then measure the bend profile in the top 15 inches of the butt, it will actually measure stiffer.
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#9 mac94

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Posted 24 November 2010 - 04:33 PM

Well, of course adding an inch to the butt doesn't change the tip flex. Nonetheless, the playing characteristics of the shaft do change.

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#10 PingG10guy

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Posted 24 November 2010 - 04:48 PM

Yes.  Loading/unloading the shaft will feel different


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#11 XYB34A

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Posted 24 November 2010 - 05:16 PM

I remember, back in my middle 30's, when the Rifle shafts came out. I bought a set of 7.5 rifle taper tip shafts, and put them in a set of irons. 1, 3-pw, sand and lob wedge. I play iron's 3/4 of an inch over length, and I called (no internet back then guys) the factory, was told that overlength Rifle shafts played stiffer, than those cut to standard length.

This was 15 years ago or so. In those days, u called golfsmith or golfworks on the phone, and had them send you the shafts. They sent you a bill, and you wrote them a check, or filled your credit card out on a form and signed it. Diffrent world.

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#12 emo

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Posted 24 November 2010 - 08:37 PM

so removing 1 inch should have opposite effect?

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#13 PingG10guy

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Posted 24 November 2010 - 10:10 PM

View Postemo, on 24 November 2010 - 08:37 PM, said:

so removing 1 inch should have opposite effect?

yep.  swingweight goes down and stiffness increases.  exact opposite

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#14 Manz60

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Posted 24 November 2010 - 10:34 PM

Hi , length is a function of flex but a golf shaft is tapered from butt to tip. Adding length does 2 things. 1) additional butt diameter increases stiffness.  2) swing weight increases -  increases flex.  These 2 occurances cancel each other out. Flex changes very little , if any.

at least thats what Rifle FAQ says....  :clapping:

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#15 mac94

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Posted 25 November 2010 - 08:32 AM

All anyone has to do to see if lenghtening a shaft softens the flex is do it. I guarantee you immediately notice the flex is softer.


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#16 jrr

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Posted 25 November 2010 - 08:38 AM

Just ordered my MP 53s and inch over with KBS Tour stiff. I actually called FCT and asked if it would change the flex. Their answer for KBS, "there would be no change in flex".

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#17 QuickFeet

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Posted 25 November 2010 - 09:23 AM

Manz60 and jrr are correct in their statements.

The OP question was regarding "does adding an inch to an iron shaft affect flex?"  Adding an inch to the shaft will change what you feel which may influence playability.  But, on an iron shaft adding an inch isn't really going to do anything regarding the shaft flex.

Manz60 found some info that is correct.......the single most import physical shaft characteristic that affects shaft flex is shaft diameter.

Here is a quick example to think about, gonna pick on AK.  He generally grips about two inches down from the grip cap.  If he held the club closer to the grip cap, would the flex of the shaft change?

Edited by QuickFeet, 25 November 2010 - 09:25 AM.

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#18 mac94

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Posted 25 November 2010 - 10:17 AM

View PostQuickFeet, on 25 November 2010 - 09:23 AM, said:


Here is a quick example to think about, gonna pick on AK.  He generally grips about two inches down from the grip cap.  If he held the club closer to the grip cap, would the flex of the shaft change?

Yes, the dynamic flex would change. You all can say all you want, just go ahead and try it. I play irons that are +1.25". I guarantee my flex changes, verified by experience and by measuring cpms.

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