Cutting KBS TSI 70 .370 parallel shafts

[John Mitchell]

I'm re shafting my irons and I want to make a set of shafts that are somewhere between a regular and a senior.  How much less do I remove from the tips than what the KBS website reccomends.  Thanks for any help.  

[Thayneil]

buy the 60s!

 

the 70s are quite stiff and stable

 

you could start with zero trim  with your longest iron

 

watch the logo wont get sucked under the grip if that bothers you

 

 

[Stuart_G]

Never change weight for the sake of stiffness.   A good fit for weight is generally way more important than for stiffness.  That's one of the downsides of the KBS shafts.  You can't change one without changing the other as well.  If one happens to be the right combination for you, that's great.  But if it isn't, you're more commonly better off going with a different make/model shaft.

 

17 hours ago, John Mitchell said:

I'm re shafting my irons and I want to make a set of shafts that are somewhere between a regular and a senior.  How much less do I remove from the tips than what the KBS website reccomends.  Thanks for any help.  

 

The 70's are already virtually a senior flex shaft (3.0) at the recommended tipping.   Have you tried / demo'd one at that recommended tipping yet?   If so, how did it feel?

 

The 80 is closer to a weak reg flex or strong senior flex (4.0) (although keep in mind what I said above). 

 

And it's also important to understand that flex (butt frequency) is a very unreliable way to judge or predict how a shaft will feel.  So any adjustments to the recommended tipping should always be based on how the shaft feels during actual testing.   If you want to soften/stiffen it up just a little bit, do a single soft/hard step.  If you want it a bit more noticeable (but not significant), soft/hard step x2.   If that's not enough you should be looking at a different shaft model.

 

Edited May 8, 2021 by Stuart_G

[John Mitchell]

There are 60's on there now, but they feel a bit light, so I think a single step on the 70's may be what I'm looking for.  Thanks for you guidance.

[Thayneil]

4 hours ago, Stuart_G said:

Never change weight for the sake of stiffness.   A good fit for weight is generally way more important than for stiffness.  That's one of the downsides of the KBS shafts.  You can't change one without changing the other as well.  If one happens to be the right combination for you, that's great.  But if it isn't, you're more commonly better off going with a different make/model shaft.

 

 

The 70's are already virtually a senior flex shaft (3.0) at the recommended tipping.   Have you tried / demo'd one at that recommended tipping yet?   If so, how did it feel?

 

The 80 is closer to a weak reg flex or strong senior flex (4.0) (although keep in mind what I said above). 

 

And it's also important to understand that flex (butt frequency) is a very unreliable way to judge or predict how a shaft will feel.  So any adjustments to the recommended tipping should always be based on how the shaft feels during actual testing.   If you want to soften/stiffen it up just a little bit, do a single soft/hard step.  If you want it a bit more noticeable (but not significant), soft/hard step x2.   If that's not enough you should be looking at a different shaft model.

 

the 70s feel and play way stiffer than 3.0 to me more like  4.5 or more.The low torque does that

 

In no way do the 70s play like  Senior flex,having tried them in nice hot weather

 

in my opinion at any rate

[Thayneil]

the 80s are the common  kbs model on the LPGA tour

 

I saw  youtube with Kim Braly and TK

 

80s will feel like soft stiffs

 

The  frequency numbers on these shafts seem way out

 

The 70s were designed to match the  KBS Tour  r model  which fequency at 5.1

 

I did ask KBS  but no response

 

 

[Stuart_G]

1 hour ago, Thayneil said:

the 70s feel and play way stiffer than 3.0 to me more like  4.5 or more.The low torque does that

 

In no way do the 70s play like  Senior flex,having tried them in nice hot weather

 

in my opinion at any rate

 

It's not the torque.    There is no standard for how the different flexes should play.

 

5 hours ago, Stuart_G said:

And it's also important to understand that flex (butt frequency) is a very unreliable way to judge or predict how a shaft will feel. 

 

 

 

Butt frequency is a very incomplete picture of the full shaft stiffness profile.   So the original recommendation still stands, any adjustments need to be made by through actual testing by the OP.  Other peoples experiences generally aren't helpful as mechanics can vary quite a bit and the whole concept of too stiff or too soft is entirely subjective.

 

[John Mitchell]

I pulled the 60's and will keep them just in case.  I swing a 7I about 78mph, so not quite ready for seniors.