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At what point does adding length to a shaft change the shaft's performance?


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At what point does adding length to a shaft change the shaft's performance? (besides, its a longer shaft). 

Let's say you buy a used Auto flex or Oban shaft and want to add a 1/2" or longer. Is there any change in how the shaft works when you add length? Is the kick point at a different spot? I'm not super knowledgeable about how shafts work, but in my head, there has to be some change, right?

 :taylormade-small: M6 12* Oban Kiyoshi Purple 65g stiff

:titelist-small: TS2 16.5* HL Oban Kiyoshi Purple 75g stiff

:ping-small:  G410 Hybrid 19* Tour stiff 

:ping-small: i210 KBS tour stiff 4-GW

:cleveland-small: 54* RTX Zipcore

:ping-small: 58* glide 3.0

:taylormade-small:  TP Black Copper Juno 34in

Oncore elixr or Snell MTBx

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Unless you add or subtract a lot of length of the shaft, you're not going to change the flex properties through length changes.  At a half inch, especially.  When you start making longer changes, what happens will depend on the profile of that particular shaft.  A shaft that is very butt-soft and tip-stiff will react differently than one that is very butt-stiff and tip-soft.

It also depends where you are adding the length, and how you're doing it.  Generally, tip trimming will make a shaft stiffer than if you reduce length by trimming from the butt section.

If you're taking an existing shaft and adding an extension to make it 1/2" longer, it's not going to change the flex.  It will result in a bit of backweighting, depending on the type of extension used.  Adding a half inch normally results in a three point increase in swingweight, but the weight of the portion of the extension inside the shaft will mitigate that somewhat.

Edited by NRJyzr
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Driver: TM Original One 11.5* set to 11*, Aldila NV75 X, 43.5" -or- SpeedZone, HZRDUS Black 75 6.5, 43.5"
3w:  Cobra King LTD, RIP Beta 90, 42" -or- Stage 2 Tour, NV105 X, 42.5"
2h or 3h:  TaylorMade Stage 2 Tour, Aldila NV105 S -or- RIP Alpha 105 S
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Ball:  Wilson Staff Duo Professional, Bridgestone Tour B-RXS, Callaway Chrome Soft

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