Mitsubishi Diamana TB Shaft Review

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The Mitsubishi Diamana TB is the fifth generation of one of the winningest, best-selling shafts in history.  Extremely smooth feel.  Consistent Feel Design opens up new options for golfers and fitters.


Sequels and follow ups tend to fall into one of two camps.  There are some that make you roll your eyes – “Do we really need another season of The Bachelor?”  There are others that have you looking at the calendar waiting for the release date.  Mitsubishi’s Diamana shafts have always been in that latter category because they find compelling new things to add to some of the best shafts in golf.

Check out the lower spin 5th-Gen Diamana, the PD, HERE


MCA dialed up the aesthetic volume on the new Diamana TB.  The Diamana branding, in silver on blue, is as big and bold as it’s ever been.  Additionally, the transition from bright white to a striking blue will turn heads.  Even the blue alone has a layers – the color seems to vary across several shades depending on the lighting.

The signature Diamana flower band is still present, though it’s downplayed with a silver-on-white color scheme.  More emphasis is put on the silver “D” logo which sits on a pool of blue near the grip.


The headline with any Diamana shaft, particularly one with their “signature smooth profile,” is smooth.  Diamana consistently makes the smoothest feeling shafts in golf, and the new TB is no exception.

For me, the kick starts just below the grip and effortlessly proceeds to the club head.  There’s no feel of aggressive loading and snapping, just an unhurried transfer of energy to the ball.

Like the fourth generation Diamana BF [review HERE], the TB has a solid tip section.  Even on mishits, I didn’t feel the head twisting or torqueing.

Find a balance between the Blue and White profiles in the Diamana GT HERE


Before I get into my personal experience, I want to explain what’s new about the fifth generation of Diamana shafts.  Mitsubishi calls it Consistent Feel Design, and it’s a tremendous concept that eschews the typical salesy junk (“Faster! Longer! Straighter!) in favor of something that will actually help golfers play better.

First, a little background knowledge.  In almost every shaft family, when you change weight class or flex, you get a bunch of other changes, too.  When you step up in flex, the shaft gets a little heavier, the butt diameter may increase, the balance point may shift.  That makes finding the right fit more complicated because it adds more variables into the mix.

With the new Diamana TB-Series, Mitsubishi has 80% less variance in butt diameter, 60% less variance in weight between flexes, and the balance points of the shafts are within 1% for each weight.  What that means is that you can isolate variables like weight and flex to find the right shaft more easily.

Now, as for how the Diamana TB-Series performed for me, it was excellent, as expected.  Diamana’s smooth (blue) shafts always make me rethink my commitment to low launch shafts, and the TB is no different.  In my testing, I found that both the direction and trajectory were extremely predictable.  The ball consistently launched on a mid trajectory with mid-low spin.  What was most exciting for me was that I saw an uptick in ball speed compared to my gamer.

The fifth generation Diamana TB is available in an enormous range of weights and flexes.  At 40 grams, Mitsubishi offers R2, Regular, Stiff/Regular, Stiff, and X.  In the 50 and 60 gram categories, the R2 is dropped and the TX flex is added.  At 70 and 80 grams, you will find Stiff, X, and TX.


Even with four generations in their rearview, the Diamana TB-Series shafts prove that Mitsubishi still has plenty of tricks up their sleeve.  The performance of the Diamana TB has me giving it serious gamer consideration, and Consistent Feel Design will make it a favorite among fitters and players alike.

Visit Mitsubishi Chemical Shafts HERE

Matt Saternus
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  1. Hi Matt,
    At age 76 (a fit one at that!) and swing speed in the 87-88 range, should I consider the 40 grams in regular flex or 50 grams ?
    I was thinking of matching these shafts to a new set of Callaway B21 clubs (driver, 5-wood, 2 hybrids & 6-PW in the irons)!
    Would that all work?

    • Matt Saternus


      Unfortunately, no one can answer your first question credibly without working with you in person.
      As to playing these in a full set of clubs, the TB is currently only available in wood shafts, not hybrids or irons. MCA does offer other shafts in those categories.



  2. Tom Duckworth

    Hi Matt nice review as always but I have a request. It is so hard to find any reviews on graphite iron shafts especially in the 95 to 110 category.
    There are some from Graphite Design, Fugikura and the MMT shaft but very little hands on reviews I bought a set of the Project X LZ graphite based on a review I read on your website. YouTube is littered with crappy reviews comparing some light weight graphite shaft to some 120 gram steel shaft that really just sends the wrong message or reinforces stereotypes. You do some of the best shaft reviews and I was hoping you might include more iron shaft reviews in the future especially in the more traditional weight category. Thanks and stay safe.

  3. I presume this was used with your Driver? What driver? These numbers look longer than anything you have hit before. What weight and flex did you use?

  4. Hi Matt. Great review. How would you compare this shaft to the zf you reviewed in March? Which did you prefer and why? I recently hit the zf 40 and was amazed how stable it was for that weight. I hit a stiff flex and have a ss of a little above 100 mph. Any thoughts you have would be appreciated.

    • Matt Saternus


      The TB is a Diamana Blue profile. The ZF is a blend of Blue and White. On the specs, I would lean toward the ZF, but I’m not sure the TB won’t start 2021 in my bag.


  5. How would you compare this to the BF? Is it worth the upgrade or is it about the same performance wise?

    • Matt Saternus


      It feels more active to me, more like a traditional blue Diamana. If that’s what you want, it’s an upgrade. If it’s not, there’s absolutely nothing wrong with the BF.


      • Carlos A Meza

        Hi Matt, need to replace the shaft on my Titleist 915D2 due to it not allowing it to screw back into the shaft? It has Diamana S+ 60R and I hit my driver very well. I would like to get a little more distance and was wondering if the new TB series would accomplish this in the same weight(60)and regular???
        Thanks for your advise or input inadvance

        • Matt Saternus


          My advice is always to get fit. The TB and S+ are similar in profile but not exactly the same. Those small differences can mean a lot to some golfers.



  6. Hi Matt:
    Long time follower. Noticed an uptick in your swing speed. Great to see. I am in a similar swing speed profile (108-110) with driver. I’ve always used Stiff shafts in the past. Will be going for a fitting in the spring 2021. Was looking at Accra line (TZ5 or TZ6) or Ventus Velocore line (probably Blue) to pair with SIM Max 9.0. Should I be trying the TB? How would you describe the feel and bend profile versus other premium shafts?

    • Matt Saternus


      If you’re going for a fitting, my advice would be to let the fitter guide you. If there are a couple shafts you really need to try, certainly scratch that itch, but otherwise let them make recommendations based on their knowledge and what they see in your swing.



  7. Hi Matt – any comparison to the Ventus Blue?

  8. Bobby Payne

    I’ve read your review of the new Graphite Design Tour AD-HD and they appear similar. Which would you say is smoother and which would you say is more stable/forgiving??


    • Matt Saternus


      I’d say the TB is smoother and, to me, more stable, because of where the kick in the HD is. The HD is more active in the tip, which feels less stable to me.



  9. Landy Rodriguez

    Hello Matt. Is the TB more stout or play stiffer than the BF? Torn between the BF, RF and now the TB. SS is 90 with smooth transition. But tend to have too much spin. Thank you and stay safe

  10. Hello Matt,

    How would you compare this shaft vs GD ADDI?

  11. Mitsu zf Versus tb 70s. Clubhead speed is 105.5 mph, I hit positive angle of attack of 0.5. Slightly open club face. And a slight over the top pull fade. Any suggestions between the two shafts? Thanks I you!!!

    • Matt Saternus


      I can only give you my best advice which is to get fit. Both are great shafts and both are fairly expensive. Getting fit ensures you’ll get the right shaft and will keep you off the expensive buy-try-resell-repeat train.



  12. Nice review Matt, Is this profile similar to fubuki k series?

    • Matt Saternus


      I’ve played with a few Fubuki in the past, but I don’t remember all the models well enough to offer a comparison to the TB.



  13. Barry Crutchley

    HI Matt
    Really good read I was looking to upgrade my Diamana™ ‘ilima 60 as its a few years old. Does this shaft fit into this Catagory. I have an average swing speed of 96 and 71 years old

    • Matt Saternus


      The ilima is the more active Redboard profile. The TB is the Blueboard profile, less active than the red.



  14. James N. Sanders

    I have gone to senior shafts i my woods. 74 yrs old and swing speed is around 78-82 mph. What would the difference be for me between the BT and ZF. thanks

  15. Dennis Scrutchfield

    I was just fitted at Club Champion-Scottsdale with the TB 50 S to the new TM Stealth2 Driver. I’m 73 with 89 mph swing speed. I can’t wait to take this club to the course. Great review!

  16. Stephen Zurica

    Hi Matt,

    Is the difference between X and TX just materials used or will there be a noticeable difference in flex also

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