What shaft flex??

[Gerson Perez]

I just Purchased mizunos Jpx850's. 

I was playing some taylormades with 85g regular flex. My 6 iron was at 83-85mph swing speed about 165 carry 

My 7 iron was at 18-20 launch angle 5000 rpm. with about a 155 carry

My driver at a regular shaft was at around 100-105mph. 

I purchased an entire set of irons and resifted my clubs to stiff as the PGA store people told me I was in the category for stiff shafts. 

Since going stiff. I am hitting shorter. My driver is slicing more. 

My 7 iron launches at 15 degrees

My driver at about 13-14. 

Will it take time, was regular a better fit for me.?

 

[Golfingdad]

Seems like a hard question to answer, as, in addition to the shaft flex, you also changed club heads.  Seems its also possible that the shaft make could be different as well?

When I got fitted for my irons I really loved the KBS (stiff) and really did not do well with the Project X (stiff) so that could play into it as well.  Since there are multiple variables, I don't know if you can pin the differences solely on the shaft flex.  100-105 driver swing speed makes stiff flex seem pretty reasonable.

[Gerson Perez]

9 minutes ago, Golfingdad said:

Seems like a hard question to answer, as, in addition to the shaft flex, you also changed club heads.  Seems its also possible that the shaft make could be different as well?

When I got fitted for my irons I really loved the KBS (stiff) and really did not do well with the Project X (stiff) so that could play into it as well.  Since there are multiple variables, I don't know if you can pin the differences solely on the shaft flex.  100-105 driver swing speed makes stiff flex seem pretty reasonable.

sorry forgot to add. I changed to the kbs tour 90's Stiff

13 minutes ago, Golfingdad said:

Seems like a hard question to answer, as, in addition to the shaft flex, you also changed club heads.  Seems its also possible that the shaft make could be different as well?

When I got fitted for my irons I really loved the KBS (stiff) and really did not do well with the Project X (stiff) so that could play into it as well.  Since there are multiple variables, I don't know if you can pin the differences solely on the shaft flex.  100-105 driver swing speed makes stiff flex seem pretty reasonable.

also my driver speed has dropped to 94-98

[Golfingdad]

4 minutes ago, Gerson Perez said:

sorry forgot to add. I changed to the kbs tour 90's Stiff

You didn't say what you changed from. ;)

4 minutes ago, Gerson Perez said:

also my driver speed has dropped to 94-98

I don't understand what you mean.  Are you saying that your swing speed dropped 6mph overnight?  That doesn't sound right at all.  That would lead me to question the measurements.

[Gerson Perez]

Just now, Golfingdad said:

You didn't say what you changed from. ;)

I don't understand what you mean.  Are you saying that your swing speed dropped 6mph overnight?  That doesn't sound right at all.  That would lead me to question the measurements.

I changed from the 85 g rocketbladez stock R shaft. in the irons

I should also point out that i cut my driver 1 inch in the new stiff shaft. I was recommended the prollaunch Red shaft. 

My speed has gone down, but definitely closer to 100. I think I started subconsciously slowing my swing down once that slice appeared. 

[mvmac]

45 minutes ago, Gerson Perez said:

I should also point out that i cut my driver 1 inch in the new stiff shaft. I was recommended the prollaunch Red shaft. 

Cutting down the driver an inch will also make it play more stiff.

[Gerson Perez]

57 minutes ago, mvmac said:

Cutting down the driver an inch will also make it play more stiff.

Most likely it is a swing flaw I picked up, but in case it was very minor, could the shaft be causing some problems?

[DrvFrShow]

@Gerson Perez There are a number of things that could be going on.

1. The club lofts of the Mizunos could be weaker than the Taylormades. That would make a huge difference in how far you hit the clubs. But you say your launching the Mizunos lower than the Taylormades.

2. Are you hitting the Mizunos flush? Are the shaft lengths the same? If you're launching the Mizzies lower you could be hitting them thin, especially if your carry distance is less. 

3. Shaft stiffness has very little effect on ball flight. Where it has effect is on how the club feels when you reach impact. This doesn't mean that shaft stiffness isn't important. How you feel when you strike the ball is very important. Do you feel like you have to swing out of your socks to get the ball in the air? If so, I'd say the shaft is too stiff for you. 

But here's a video for you to look at where Mark Crossfield talks about shaft stiffness. The numbers don't lie.

 

Edited December 22, 2015 by DrvFrShow

[mvmac]

2 minutes ago, Gerson Perez said:

Most likely it is a swing flaw I picked up, but in case it was very minor, could the shaft be causing some problems?

Yeah it is probably mostly the swing but I'm guessing the shaft isn't helping. Demo another driver and see if there is a difference. 

[DrvFrShow]

I agree. Demo another driver. Try it in both a S-flex and an R-flex and see which one you like the feel of better. You may simply like the feel of a more flexy shaft R-shaft. If that's the case, just get a different shaft. By my SS numbers I should be hitting a stiff shaft, but I prefer the feel of the more flexy shaft. I don't feel like I have to swing out of my socks to get the ball in the air. It doesn't feel like I'm swinging a board. Your club carry distances seem to be about the same as mine. 

Remember this, however - not all flexes are created equal. Aldila R-flex is the same as a many other manufacturers' S-flex. So if you fit into S-flex, and the shaft is an Aldila, you want an R-flex because the S-flex will be equivalent to an X-flex. Most fitters don't know this because they haven't visited the Aldila web site and looked at their fitting data. Under 90 mph = A-flex. 90-100 = R-flex; 100-110 = S flex; and > 110 = X flex in an Aldila shaft.

I looked at the specs of the irons. The 7 iron in the Mizuno set is 32 degrees and is 36.75" long. The 7 iron in your old Taylormade set was 30.5 degree and 37" long. If you're one of these people who grip the club at the end the 1/4 inch can make a difference. 32 degrees will be a little shorter. The Taylormades are strong lofted clubs, while the Mizunos are more standard lofted clubs.

 

Edited December 22, 2015 by DrvFrShow

[Gerson Perez]

1 hour ago, DrvFrShow said:

I agree. Demo another driver. Try it in both a S-flex and an R-flex and see which one you like the feel of better. You may simply like the feel of a more flexy shaft R-shaft. If that's the case, just get a different shaft. By my SS numbers I should be hitting a stiff shaft, but I prefer the feel of the more flexy shaft. I don't feel like I have to swing out of my socks to get the ball in the air. It doesn't feel like I'm swinging a board. Your club carry distances seem to be about the same as mine. 

Remember this, however - not all flexes are created equal. Aldila R-flex is the same as a many other manufacturers' S-flex. So if you fit into S-flex, and the shaft is an Aldila, you want an R-flex because the S-flex will be equivalent to an X-flex. Most fitters don't know this because they haven't visited the Aldila web site and looked at their fitting data. Under 90 mph = A-flex. 90-100 = R-flex; 100-110 = S flex; and > 110 = X flex in an Aldila shaft.

I looked at the specs of the irons. The 7 iron in the Mizuno set is 32 degrees and is 36.75" long. The 7 iron in your old Taylormade set was 30.5 degree and 37" long. If you're one of these people who grip the club at the end the 1/4 inch can make a difference. 32 degrees will be a little shorter. The Taylormades are strong lofted clubs, while the Mizunos are more standard lofted clubs.

 

The reason why I got the Stiff was because with my stock 2014 Big Bertha shaft I was launching the ball towards of 17-21 degrees with almost 5000 rpms with a carry of 200 yards. At a swing speed of 102.
Employee thought with a stiff shaft I would get more carry. 

And...I did reduce my rpm to 1800-3000 with the prolaunch R shaft. I have carried the ball 230 when I hit it well, however I am slicing more and sometimes I feel like my ball dies out of the air, like a shot duck. 

Hopefully Im making sense to the people that know more about these things. 

Thanks with the help so far 

Edited December 22, 2015 by Gerson Perez

[DrvFrShow]

@Gerson Perez Interesting about that driver since I have the same one except with a Fubuki Z-50 R-shaft cut to 44.5". I have the loft at 11.5*. With my SS at 95 mph. Driver is set to neutral face. Callaway drivers have a sweet spot just above the center of the club face, and that's where the spin numbers drop off. I get spin numbers around 2250 rpm with this set up and a carry of around 216 - 225 yds. I've tried different shafts on this (stiff and a real flexy shaft) and my spin numbers only changed by about 100 rpm.

With 102 mph SS you should be crushing the ball about 240 - 245 yds. carry. It's probably not the shaft. I'd guess a loft of about 9.5* would be about right for you and might reduce spin, but it sounds like you're not contacting the club in the sweet spot. You should not be getting those spin numbers unless you're simply mishitting. 1800 is too low, and 3000 is a little too high. This driver is good for 2100 - 2400 rpm.

Get a can of Dr. Scholl's Foot Spray and spray the face of your driver before you practice with it. It works like impact tape except you can wipe it off and it doesn't affect ball flight by reducing spin. You'll see where your ball is impacting the club head. You may need a lesson with the driver.

I'd been practicing at the driving range with a 2012 Razr Fit 11.5* with an Aldila Trinity A-Flex at 44.5" because I didn't want to beat up my Big Bertha with half frozen range rocks in the winter.

Edited December 22, 2015 by DrvFrShow

[Gerson Perez]

8 minutes ago, DrvFrShow said:

@Gerson Perez Interesting about that driver since I have the same one except with a Fubuki Z-50 R-shaft cut to 44.5". I have the loft at 11.5*. With my SS at 95 mph. Driver is set to neutral face. Callaway drivers have a sweet spot just above the center of the club face, and that's where the spin numbers drop off. I get spin numbers around 2250 rpm with this set up and a carry of around 216 - 225 yds. I've tried different shafts on this (stiff and a real flexy shaft) and my spin numbers only changed by about 100 rpm.

With 102 mph SS you should be crushing the ball about 240 - 245 yds. carry. It's probably not the shaft. I'd guess a loft of about 9.5* would be about right for you and might reduce spin, but it sounds like you're not contacting the club in the sweet spot. You should not be getting those spin numbers unless you're simply mishitting. 1800 is too low, and 3000 is a little too high. This driver is good for 2100 - 2400 rpm.

Get a can of Dr. Scholl's Foot Spray and spray the face of your driver before you practice with it. It works like impact tape except you can wipe it off and it doesn't affect ball flight by reducing spin. You'll see where your ball is impacting the club head. You may need a lesson with the driver.

I'd been practicing at the driving range with a 2012 Razr Fit 11.5* with an Aldila Trinity A-Flex at 44.5" because I didn't want to beat up my Big Bertha with half frozen range rocks in the winter.

That's the shaftI had but had it at standard length 

[WUTiger]

One additional swing characteristic related to choosing shaft flex is your tempo [transition] at the top. If you have a smooth transition, you can get by with a somewhat softer flex. If you have a very quick transition, you might benefit from a slightly stiffer flex.

Tempo is one of the five factors of swing DNA that the Mizuno Shaft Optimizer measures.