50 Words or Less
The Mitsubishi Diamana RB hybrid shaft has an electrifying feel that takes minimal effort to achieve. Slightly higher ball flight than the other Diamana hybrid shafts. Tight dispersion. Built for smoother swingers.
Introduction
“As the island of knowledge grows, so do the shores of our ignorance.”
This quotation may seem like an odd way to start a golf equipment review, but it speaks to why I’ve continued enjoying this work for almost two decades. Heading into this series of reviews on the new Diamana hybrid shafts, testing the RB did not excite me – Mitsubishi doesn’t even make it in “my” flex. Now, it’s the shaft I’m most excited to talk about. Let’s dive into the surprising Mitsubishi Diamana RB hybrid shaft.
Looks
There is an obvious answer to the question, “What should the Mitsubishi Diamana RB hybrid shaft look like?” That answer is, “Just like the iconic Diamana RB [review HERE].” Mitsubishi did not fail to do to obvious-but-correct thing.
Just below the grip, we get an expanded version of the classic flowerband graphic. The original is still there, in a subtle, darker grey, but the bright white flowers falling down the shaft are more attention-grabbing. Below that is arguably the best-known logo in the shaft world, the Diamana surfboard, followed by the model name, weight, and flex. All of this is set on matte black for a shaft that’s recognizable but not distracting. [See Price / Buy]
Feel
I’ve swung a lot of red-style shafts, so I thought I knew what to expect from the Mitsubishi Diamana RB hybrid shaft. My first swing gave me something totally different. With a smooth effort, the shaft provided a thunderous kick down and through the ball, like a hammer coming down on an anvil. While there was a lot of kick in the tip section, the action felt like started at the grip and fired all the way through the shaft. And, true to Diamana’s reputation, this action felt smooth and controlled, not hinge-y or wild.
For reference, Mitsubishi describes their three Diamana hybrid shafts as follows, from butt to mid to tip. The scale is Soft to Medium to Firm. The Mitsubishi Diamana RB hybrid is Medium+, Medium+, Soft+. Diamana BB is Firm, Soft, Firm. Finally, Diamana WB is Medium, Firm, Firm.
Performance
Despite the things I’ve learned about shaft fitting [check that out HERE], it’s hard to deprogram myself from all the years of thinking about “red” shafts as high launch and high spin. When I plugged the Mitsubishi Diamana RB hybrid shaft into my PXG head, I was expecting a high, soft ball flight, perhaps bordering on ballooning. What I got was a trajectory only marginally higher than what I usually produce. Compared to the other Diamana hybrid shafts, the RB is the highest launching and spinning, but the difference is modest – a couple degrees of launch and a few hundred RPM. This was a good reminder that the shaft is important, but it’s not going to fundamentally change who you are as a golfer.
The other way in which the Mitsubishi Diamana RB hybrid shaft surprised me is with its stability and accuracy. Again, years of conditioning had me expecting a wide dispersion and lots of hooks. In reality, the RB was impressively strong against mishits, produced a tight dispersion, and proved capable of shaping the ball both ways. All I had to do was make a smooth swing.
And that is where the three different Diamana shafts show their personality: in the type of swing they fit. Regular readers know that I’m an aggressive swinger, but, as luck would have it, my first testing session with the Mitsubishi Diamana RB hybrid shaft had me doing my poor man’s imitation of Adam Scott. When I was “letting the club do the work,” the Diamana RB was brilliant. And the shaft encourages that with it’s smooth, active feel. When you swing smooth, it feels like the shaft multiples your efforts.
I would be lying if I said every testing session with this shaft was that harmonious. On days when I was swinging more like my normal self, the results with the Diamana RB hybrid shaft were not as good. It’s not that I was overpowering the shaft; it just felt like a mismatch. It was two people trying to be let the other go first: lots of energy expended without much progress being made. For moderate or aggressive swingers, Mitsubishi has the Diamana BB and Diamana WB, both of which I’ll review in the coming weeks.
The Mitsubishi Diamana RB hybrid is offered in four configurations. At 63 grams, there is an R2 flex and a Regular flex. Moving up to 73 grams, golfers are offered Regular and Stiff flex. All versions have a .370 tip diameter and a .600 butt diameter. [See Price / Buy]
Conclusion
The Mitsubishi Diamana RB hybrid defied my expectations with a stronger-than-anticipated ball flight and excellent dispersion. It does necessitate a smooth swing, but it encourages that with a smooth, exciting feel. If you’re a syrupy swinger who wants to get their hybrid in tune with their motion, this is a shaft worth trying. [See Price / Buy]
Launch it high and stop it fast. Our hybrid shafts are designed to help you hit it in your preferred window with just the right amount of spin to give you the most possible control.
He founded Plugged In Golf in 2013 with the goal of helping all golfers play better and enjoy the game more.
Matt lives in the northwest suburbs of Chicago with his wife and two daughters.
- Mitsubishi Diamana RB Hybrid Shaft Review - September 15, 2026
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