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Mizuno T20 wedges: Let’s get spinning

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Spin.

We’re always trying to reduce it with our driver and increase it with our wedges for maximum control, but with the rules of golf being so strict, how do actually achieve a performance gain? Simple engineering…

This is the Mizuno T20 wedge.

It’s been a few years since we have seen a T (teardrop) wedge from our friends at Mizuno, and there is good reason.

Let’ get into a quick history lesson: before the JPX900 series was introduced, Mizuno had quietly been realigning the product cycles of the MP and JPX lines. You might remember back a few years ago now before the MP18s hit the scene that there was a bit of a lull in the MP line—so much, in fact, there was even a thread here on GolfWRX asking “Is Mizuno not making MP irons anymore?”

It was a naturally curious question to a company that always had very standardized release cycles, but it was a long-term play that has paid off tremendously. We now get “T” wedges with MP irons (MP20s to be exact), and we should (from everything I know) continue to see “S” Silhouette (more rounded profile) wedges with future JPX lines.

Before we get to what’s new, how about we first talk about what will be staying the same

  • Grain Flow Forged HD – like all new Mizuno irons, the T20s are made using the same forging process to increase the density of the material in the clubhead for an improved solid feel.
  • Boron – this little element when added to the 1025e mild carbon steel used in the wedges (we’re talking trace amounts equating to 3ppm – parts per million) increases the strength of the material by 30 percent—how crazy is that for chemistry? This improves groove life and has ZERO effect on club feel.
  • Variable Width & Depth Quad Cut Grooves – Like previous T and S wedges, the T20s will have quad cut grooves that will vary in shape based on the loft of the club. Lower lofted wedges are more narrow and deeper, while higher lofted wedges are wider and more shallow since impact happens at lower speeds this increases spin consistency.
  • Same beautiful Teardrop profile from address

So what’s new?

Flow. Just like the MP20s, engineers are bringing more a more extreme CG (center of gravity) shifting philosophy, or as Mizuno explains it, increased vertical moment of inertia to the wedges. As much as you (well maybe not “you,” depending on who you are) might think “a wedge is just a wedge” and loft is the only deciding factor for spin, you couldn’t be further from the truth. By relocating the CG throughout the set and changing the sweet spot height, engineers can further alter the launch and spin precisely for each loft.

It’s about gear effect—the higher you hit above the CG the less spin the ball with have, and the closer to or lower you make impact compared to the CG the more spin you will create. Either way these are wedges, so a 50 degree, for example, is still going to spin, but it is now more controllable (think less likely to ballon or get too high on full shots). On the other side of the equation, a 60-degree wedge will allow for even MORE trajectory and spin control for the low flying quick checkers with zip.

Now about that spin.

By the Rules of Golf, you can’t make grooves sharper, you can’t increase their volume, and you can only have so much surface roughness (sorry but that old Spin Doctor wedge is HIGHLY NON-conforming). So what do you do? You change the way you think about that surface roughness…

Hydroflow Micro Grooves

Instead of traditional laser etching parallel to the grooves, Mizuno engineers took a concept from the high-performance tire world and went perpendicular to the grooves and parallel to the direction the ball moves up the face to channel moisture away. This directional tread has proven to increase spin on shots especially in conditions with moisture up to 1,200 RPM (on a 60-yard shot), that’s a very tangible number. It’s not just about spin either: the more the friction that can be created also means more control on launch angle and less of a “floating” ball flight. That’s how those low zippers keep zippin’!

Don’t think for a second that Mizuno just changed the etching and was done with it. The process went through multiple iterations to figure out how they could improve its life (beyond the boron) and the solution was to etch before the chroming process to elongate the lifespan. The other groovy take for the T20s is the actual reconfiguration of the grooves. To get the bottom groove closer to the leading edge without having it disorient the overall look of the club and making it appear that the heel or toe is thinner on one side. The lowest groove has been shortened and centered.

All of these refinements; CG, micro-grooves, and reconfigured scoring lines add up to one thing: more control and improved shotmaking with your wedges.

Finishes, specs, and grinds

The wishes of many have been answered when it comes to the T20s, there will be a RAW finish (happy dance time) along with traditional chrome and the signature blue ion. Leftys will only be able to get chrome, but all the same options will be available as far as lofts and grinds.

Coming in lofts from 46-60 degrees, the grind options progress depending on the loft and bounce. Going from full-soled in the lower lofts to more aggressive back edge, and heel-toe relief in the 60 degree. These sole shapes came directly from Mizuno’s craftsman that worked with players and prototypes to determine exactly how the bounce and sole shapes should work in harmony.

All of this has come together to create Mizuno’s finest wedge to date.

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Ryan Barath is a writer & the Digital Content Creation Lead for GolfWRX. He also hosts the "On Spec" Podcast on GolfWRX Radio discussing everything golf, including gear, technology, fitting, and course architecture. He is a club fitter & master club builder who has more than 16 years experience working with golfers of all skill levels, including PGA Tour professionals. He studied business and marketing at the Mohawk College in Hamilton, Ontario, Canada, and is the former Build Shop Manager & Social Media Coordinator for Modern Golf. He now works independently from his home shop in Hamilton and is a member of advisory panels to a select number of golf equipment manufacturers, including True Temper. You can find Ryan on Twitter and Instagram where he's always willing to chat golf, from course architecture to physics, and share his passion for club building, and wedge grinding.

8 Comments

8 Comments

  1. Dave

    Jul 17, 2019 at 11:00 pm

    “ballon”

  2. Pelling

    Jul 17, 2019 at 7:48 pm

    How can Mizuno claim that Boron doesn’t impact feel?

  3. justsayin

    Jul 16, 2019 at 4:45 pm

    They’re doing that Fourteen thing where it’s thicker in the high toe.

    • M

      Jul 16, 2019 at 10:02 pm

      Which Vokey and Ping have already copied.

      • DB

        Jul 17, 2019 at 9:16 am

        Yeah, not sure you can make the case that PING copied that. Their old wedges are the OG thick high toe.

  4. Travisty

    Jul 16, 2019 at 12:57 pm

    Release date?

  5. August

    Jul 16, 2019 at 11:56 am

    You had my curiosity but when a raw version was mentioned, well then you had my attention.

    • Matthew Cox

      Jul 17, 2019 at 4:47 am

      I’m sure you can afford it Monsieur Candie.

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Whats in the Bag

Justin Thomas’ WITB for course-record 61 at Medinah

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Driver: Titleist TS3 (9.5 degrees)
Shaft: Mitsubishi Diamana BF 60TX

justin-thomas-witb-driver

3-wood: Titleist TS3 (15 degrees)
Shaft: Mitsubishi Tensei CK Pro Blue 80TX

5-wood: Titleist 915FD (18 degrees)
Shaft: Fujikura Motore Speeder VC 9.2 Tour Spec X

Irons: Titleist T100 (4), Titleist 718 MB
Shafts: True Temper Dynamic Gold Tour Issue X100

Wedges: Vokey Design SM7 (46, 52, 56 degrees), Vokey Design SM6 (60 degrees)
Shaft: True Temper Dynamic Gold Tour Issue S400

Photo via Vokey wedge rep Aaron Dill

Putter: Scotty Cameron X5

Grips: Golf Pride Tour Velvet Cord
Grip: SuperStroke Pistol GT Tour

Ball: Titleist Pro V1x

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Equipment

Forum Thread of the Day: “Best ball for players with slower swing speeds?”

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Today’s Forum Thread of the Day comes from ghoul31 who created a thread dedicated to finding the ideal golf ball for players with slower swing speeds. Our members have their say on what is the ball most suited to slower swing speeds, with a variety of models receiving a mention.

Here are a few posts from the thread but make sure to check out the entire discussion and have your say at the link below.

  • Hogan9: “My SS is 80 to 85. I play the Titleist AVX. Many people on these forums tell it’s wrong for me. I’ve tried several brands and types over the last year ( Pro-V-1 and 1X, Cally Supersoft and Chrome Soft, TM TP5X, Wilson Duo Soft and the Snell MTB. The AVX gives me the best overall performance for my game. I’ve had to slightly adjust to how it reacts on chips and pitches, but the extra distance off the tee is well worth it. “
  • North Butte: “Maybe 90mph driver swing on a good day. Driver 205-ish hit 6-iron from 150. Pro V1x but I have played AVX, B330, TP5 with pretty much similar results to my favorite V1x. Also played the Chrome Soft for a while but it seemed to fly a little low and sometimes have trouble holding greens (or maybe I just didn’t give it a long enough chance to know for sure).”
  • Hat Trick: “Pro V1X – Spin and higher launch keeps it in the air longer, but at the same time that spin holds the greens – SS 96-98 mph.”
  • Kmac: “My SS is right around 95-100, and I find the QST to the perfect for my game. I will also play the AVX or Chrome Soft Truvis. But for the money, nothing beats the QST.”

Entire Thread: “Best ball for players with slower swing speeds?”

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Equipment

Forum Thread of the Day: “Single length irons stunting development?”

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Today’s Forum Thread of the Day comes from rbark11 who has sparked an interesting debate over single length irons in our forums. Rbark11 has been playing single length irons for the past seven months, and he is concerned that he may have issues changing back to regular length irons. Our members give their take on the matter, as well as discussing single length irons in general.

Here are a few posts from the thread, but make sure to check out the entire discussion and have your say at the link below.

  • mcs4: “No, it will not. Both my father and I are currently playing Cobra One Length irons after decades of playing variable length irons. It took both of us maybe a few rounds to feel comfortable with the switch. This weekend I played a round with my old irons, and it was different but not a big deal. My opinion is that there are pros and cons with each approach, but I don’t think picking one will make any particular negative impact on your ability to later switch to the other.”
  • Quadra: “I’ve played both. Right now I am back to VL clubs ( Wishon 560 irons). Find VL gives me more shot-making options. With uneven lies, especially with the ball above or below foot level, the shot seems easier with a more upright or flatter lie, rather than trying to manipulate a shot from clubs with only a single length/lie. VL = more shot possibilities.”
  • Aucaveman: “I played Cobra ftbo for a year. Shot my best scores ever. Our club switched to Mizuno exclusively, so I had my first real fitting. I switched to the 919 forged and had to sell the Cobras to fund the mizunos. Really wished I hadn’t. I really liked the Cobras. The shafts in the Mizuno’s are better suited for me but had I put the same shafts in the Cobras; I’d prob been better off. At some point, I’ll prob do it and go back to one lengths. I was perusing eBay yesterday actually.”
  • Brandons68: “I think that the consistency you gain from SL irons is pretty great. I have not played them personally, but have talked to several people that have, and they really like the feel of the irons and the fact that they swing every iron the same because they are all the same length.”

Entire Thread: “Single length irons stunting development?”

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