With its new M3 and M4 irons, TaylorMade has introduced a “RibCOR” technology that’s designed to produce more speed on mishits. Before we get into what exactly that design is, let’s see why this concept is important.
COR, or coefficient of restitution, is the measure of energy transfer between two objects. For golf club manufacturers, especially when making game-improvement irons, the goal is to get COR as high as possible; this means ensuring as much energy gets transferred from the club face to the golf ball as possible during impact. Of course, the USGA sets a limit on COR of golf clubs so they can only go so far.
Many companies these days have figured out how to maximize COR on the center of the club face. Now, the game for engineers across the industry has become “how high can we make COR on shots hit off-center.” The goal obviously being to produce as much speed on off-center hits as possible, or, minimizing energy loss at impact.
TaylorMade, for its new M3 and M4 irons, has introduced RibCOR technology that uses two ribs, or beams, on the outer portions of the heel and toe as pictured below.
This provides internal support on the outer portions of the club so that the face can flex as much as possible at impact, thus retaining energy transfer from the club the golf ball. So while the center of the face may not produce more speed compared to its M1 and M2 predecessors, this design should impart more ball speed across the face. That means more forgiveness, or MOI (moment of inertia).
The RibCOR design couples with a number of familiar technologies from the company’s past including inverted cone technology, speed pockets and face slots. These are all designed for to produce higher ball speeds and more forgiveness, helping golfers who don’t hit the center of the face every time to launch the ball high and far.
As with the M1 and M2 irons they replace, the lower-numbered M3 iron has a more compact look and is designed for slightly better players, whereas the higher-numbered M4 iron is built for more distance and forgiveness, and has a larger head profile.
For more photos and discussion click here, or read below for more info on each of the offerings. Both the M3 and M4 irons will be available at retail on February 16.
Taylormade M4 irons
As the more forgiving of the two M-family offerings, TaylorMade’s M4 irons have fluted hosels, 1mm toplines, and what TaylorMade calls its “thinnest ever leading edge.” Also, along with the RibCOR technology that’s in both the M3 and M4 irons, additional mass has been placed on the toe and heel portions of the M4 irons to produce great forgiveness on off-center hits.
Overall, the M4 club heads have 24 percent higher MOI than the M2 2017 heads, according to TaylorMade, so golfers will find them to be more forgiving than their predecessors.
The M4 irons (4-LW) will come stock with either KBS Max 85 steel shafts (R and S flex), Fujikura Atmos shafts (5A, 6R, 7S), or additional custom shafts, with TM Dual Feel grips. Steel will sell for $899 per set, while graphite will sell for $999.
Taylormade M3 irons
The TaylorMade M3 irons, while housing some of the same technologies as the M4 irons, are made for those players who want a more compact shape and are looking for more trajectory control. To help achieve this look without sacrificing much by way of forgiveness, TaylorMade ha added a 15-gram tungsten weight to the soles of the M3 irons; this lowers CG in the head.
The irons have a 180-degree fluted hosel — that means it’s not as visible at address compared to the 360-degree fluted hosel in the M4 irons — to help move weight away from the heel. The irons have a thinner topline than the M1 irons they replace, according to TaylorMade, and have soles designed with more bounce for better turf interaction.
M3 sets (3-SW) come stock with either True Temper XP100 steel shafts (R300, S300), Mitsubishi’s Tensei graphite shafts (70R or 80S), or additional custom shafts, and with Lamkin UTx NC grips. M3 irons will sell for $999 with steel shafts or $1199 with graphite.
Best irons in golf of 2021: Best blades
A new set of irons is the single biggest investment you can make into your set of golf clubs. At GolfWRX, to determine the 2021 best irons and their categories, we have compiled an expert panel of fitters to help you find out which of 2021 irons is best for your game.
In 2021, OEMs have continued to push the engineering envelope of iron design by utilizing new technology and manufacturing methods to create clubs that offer forgiveness, along with faster, more consistent club faces and launch windows. Not only that, but we are also seeing more segmentation of models from equipment manufacturers to help you determine your best set and/or set combination thanks to fitting.
These fitting options are important because irons are the key to better scoring and by building the perfect set, you create a cohesive group of clubs in your bag to help you reduce dispersion and hit it closer to your target.
That being said, ultimately the best way to find your personal iron set is to work with a professional fitter using a launch monitor. The difficult part is a lot of people don’t have easy access to fitters, launch monitors, and club builders—so at GolfWRX, we have done a lot of the work for you.
We are in the era of not just maximizing distance but also minimizing the penalty of common misses for each player—this applies to irons just as much as it does with any other club in the bag. This is why, now more than ever, custom fitting is essential to help you see results on every swing you make.
The methodology is simple: We want to give you the tools and information to go out and find what works best for you by offering recommendations for your individual iron set wants and needs with insight and feedback from the people who work every single day to help golfers get peak performance out of their equipment.
Best irons of 2021: How we did it
Before starting the process of building our best iron survey, we reached out to our trusted fitters to discuss how they sort through the endless number of iron options available to golfers. The consensus was clear—the best fitters in the world see all the options available in the marketplace, analyze their performance traits, and pull from that internal database of knowledge and experience like a supercomputer when they are working with a golfer.
It’s essentially a huge decision tree derived from experience and boiled down to a starting point of options—and it has nothing to do with a handicap!
Modern iron sets are designed into player categories that overlap the outdated “what’s your handicap?” model, and at GolfWRX we believe it was important to go beyond handicap and ask specific questions about the most crucial performance elements fitters are looking at to help golfers find the best set of irons for them. From overall performance to shotmaking, to helping players achieve better trajectories and speed, we strived to ask the right questions.
These are the best iron categories we have developed to help you the reader determine what rankings are most important for your swing and game.
Best irons of 2021: The categories
Best irons of 2021: Meet the fitters
Nick Sherburne: Founder, Club Champion
Clare Cornelius: Fitter, Cool Clubs
Eric Johnson: Fitter, True Spec Golf
Shaun Fagan: Fitter, True Spec Golf
Kirk Oguri: PGA Professional/ Club Specialist, Pete’s Golf
Sue O’Connor: Fitter, Cool Clubs
Scott Felix: Owner, Felix Club Works
Mark Knapp: Club Fitter, Carls Golfland
Ryan Johnson: Club Fitter, Carls Golfland
Eric Hensler: Manager & Fitter, Miles of Golf
Brad Coffield: Fitter Carls Golfland
Nick Waterworth: Fitter, Haggin Oaks Golf Super Shop
Adam White: Co-Founder & Director of Club Fitting, Measured Golf
Scott Anderson: VP of Sales, Fitter, True Spec Golf
Matthew Sim: Director of Operations, Modern Golf
Ian Fraser: CEO & Founder, Tour Experience Golf
Mike Martysiewicz: Director of Club Fitting & Building, Tour Experience Golf
Shawn Zawodni: Fitter, Miles of Golf
Ben Giunta: Owner, The Tour Van
2021 Best irons: Blades
This is by far the most straightforward category because it is defined by a single style of club—the blade AKA the muscleback or MB for short. Although modern variations offer a lot more playability than they did decades ago, blades are still defined by their workability, compact shaping, and lower ball flight. If you are looking for the ultimate test or just prefer something in the more traditional vein, these are for you.
Srixon Z Forged
Their story: The Z-Forged irons from Srixon are forged from a single billet of soft 1020 carbon steel, and are designed to offer players an exceptional amount of feel throughout all shots. The irons also contain the patented Tour V.T Sole which is designed to provide more consistent ball striking while keeping the versatility to execute every type of shot.
From the fitters
- I know this is will sound like an oxymoron based on the category, but thanks to the profile and sole design, the Z-Forged is quite a forgiving blade option.
- This is my favorite blade iron because of the VT sole—it’s a game-changer for steeper players who take a divot but still performs great for those that don’t.
- With blades all being very familiar, it often comes down to look and turf interaction, and the Z-forged arguably offers the best turf interaction of the group with the beveled leading edge.
Callaway Apex MB
Their story: The Callaway Apex MB is forged from 1025 carbon steel with a classic shape that is similar to other blade irons from Callaway’s past, but this time with a slightly narrower sole and less offset. Another improvement is the 20V grooves ensure optimal spin control in and out of the rough.
The centrally located weight screw in the back of the head allows Callaway builders to maintain the precise center of gravity locations when adding or removing weight from the irons—it’s not a new idea, but it’s one that is key to allowing the irons to be dialed into spec for each golfer.
From the fitters
- With its compact profile and subtly square toe, the Apex MB is the best-looking blade on the market in my opinion. It’s also very easy to work the ball in any direction you want.
- The central weight screw for adjusting swing weight has been great this year for quality control and to fine-tune during fittings. Although not everyone is sensitive to swing weight, this feature allows us, and secondly the builders, to get things just right.
Their story: Mizuno calls the MP-20 “the ultimate tour blade” thanks to its melding of modern manufacturing techniques with classic styling. The MP20s provide flow throughout the set from top to bottom leading to greater control over ball flight. This flow also increases forgiveness (please remember it’s still a blade) and launch in the longer irons, with an increased ability to flight the ball in the scoring clubs.
To help create the classic Mizuno feel, the irons are also complemented with a copper underlay beneath the final chrome plating.
From the fitters:
- The MP-20 is the quintessential Mizuno blade while also being quite a bit easier to hit—a relative term I know.
- Not only is the iron great on its own, but Mizuno has a fantastic fitting cart full of shaft options.
Titleist 620 MB
Their story: The 620 MB offers ideal turf interaction throughout the set thanks to more camber and a tweaked leading edge. In addition to the sole tweaks, the blade length is progressive from the longest iron to the shortest and the transition is so smooth that unless you set clubs next to each other, it’s quite difficult to notice. The final design element is the face height progression which transitions from more shallow to tall in the pitching wedge to offer the greatest control over ball flight.
From the fitters:
- As long as the player has the skill set to play a blade, the 620 MB is consistent and the misses are not too bad.
- This is a “traditional blade” in every sense, and sticks with slightly more traditional lofts. The other great thing Titleist did with the lofts of the MB is match them exactly to the 620 CB so you can easily build combo sets—because even at this point Adam Scott isn’t using a blade 3-iron.
Their story: Making something seem simple is often the most challenging. What makes the TaylorMade P7MB great is in the nuance and very fine details that the designers made upgrades to compared to the previous models. The P7MB keeps the same workability as the previous generation P730 but with some extra forgiveness built into the longer clubs by the way of a slightly longer blade length. The irons are also manufactured using a multi-step forging process which includes a 2,000-ton forging press to push the quality tolerance of every 1025 carbon steel forging to its peak.
From the fitters:
- A lot of the players I have worked with have given great feedback on the look and feel of these irons. I also love that the whole P-Series irons can be easily custom-built as combo sets—P7MB’s mixed with a couple of P7MC longer irons is a real “gamer” set.
- This is without a doubt the nicest looking and best-performing blade TaylorMade has ever produced.
Matthew Wolff WITB 2021 (April)
Driver: TaylorMade M1 460 (10.5 degrees @ 9 degrees)
Shaft: Graphite Design Tour AD HD 7 X
3-wood: TaylorMade SIM2 Titanium (15 degrees)
Shaft: Graphite Design Tour AD XC 8 X
Irons: TaylorMade P7MC (3-PW)
Shafts: Project X 6.5
Wedges: TaylorMade MG2 (50-09SB, 56-12SB, 60-09LB)
Shafts: True Temper Dynamic Gold Tour Issue X100
Putter: TaylorMade Spider X Proto (33 inches, lie at 70, 3.5 loft, D4)
Grip: TaylorMade Red/Black
Ball: TaylorMade TP5 ’21 Pix
Grips: Golf Pride ZGrip Cord (+3 double-sided tape)
Tony Finau WITB 2021 (April)
Driver: Ping G425 LST (9 degrees @7, Big -)
Shaft: Mitsubishi Diamana D+ Limited 70 TX (45.25 inches, tipped 1.5 inch)
3-wood: Ping G400 Stretch (13 degrees @14), D5+ swing weight
Shaft: Mitsubishi Diamana D+ Limited 80 TX (42 inches)
Irons: Nike Vapor Fly Pro (3), Ping Blueprint (4-PW)
Shafts: Graphite Design Tour AD DI Hybrid 105 X (3), Nippon N.S. Pro Modus3 Tour 120 X
Wedges: Ping Glide Forged (50-10, 56-10), Titleist Vokey Design SM8 (60-10S)
Shafts: Nippon N.S. Pro Modus3 Tour 125 X (50, 56), Nippon N.S. Pro Modus3 125 Wedge
Putter: Piretti Elite Custom
Ball: Titleist Pro V1
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Matthew Wolff WITB 2021 (April)
Driver: TaylorMade M1 460 (10.5 degrees @ 9 degrees) Shaft: Graphite Design Tour AD HD 7 X 3-wood: TaylorMade SIM2 Titanium...
Tony Finau WITB 2021 (April)
Driver: Ping G425 LST (9 degrees @7, Big -) Shaft: Mitsubishi Diamana D+ Limited 70 TX (45.25 inches, tipped 1.5 inch)...
Collin Morikawa WITB 2021 (April)
Driver: TaylorMade SIM (8 degrees @8.5) Shaft: Mitsubishi Diamana D+ Limited 70 TX 3-wood: TaylorMade SIM Titanium (15 degrees @13.5) Shaft: Mitsubishi Diamana...
Madelene Sagström WITB 2021 (April)
Driver: Callaway Epic Speed Triple Diamond LS (10.5 degrees) Shaft: Fujikura Evolution II 665 Tour Spec S 3-wood: Callaway Epic Speed (15...
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