AeroTech SteelFiber Constant Weight Iron Golf Shaft Review

Aerotech SteelFiber Iron Shafts – constant weight taper tips

By Russ Ryden, Fit2Score, A Dallas Fort Worth Club Fitter & Club Maker
The Golf Center at the Highlands, Carrollton Texas

Aerotech Logo

I have known Chris Hilleary, owner of AeroTech almost from the day I started club building. He has always been an active supporter of the club building & fitting organizations. When Matt Kuchar started playing and winning with Aerotech Steel Fiber iron shafts, the brand became better known.

The SteelFiber constant weight taper tip model is the most popular of the Aerotech iron shafts. It comes in five weights, 70, 80, 95, 110 and 125 grams.  The profiles change slightly with each weight.  The torque is slightly higher than steel, but certainly in range for tour grade iron shafts.


Aerotech SteelFibre shafts have a stainless wire wrapped over a filament wound graphite core, combining the properties of steel and graphite into the shaft.  The construction of the ‘wire’, 1/10 the diameter of a human hair is illustrated here.

Having heard Chris say that the design of the Aerotech SteelFiber shaft eliminates ovaling in the shaft, I tested the claim. In golf shafts, the wall thickness near the butt end of the shaft is thin. In light weight shafts this creates ovaling. The shaft flattens, becoming elliptical when it is loaded. I clamped an 85 gram steel shaft and deflected it 5 inches. I could measure 0.005″ of ovaling. The 80 gram Aerotech SteelFiber shaft ovaled .001″. The combination of carbon fiber and a stainless steel wire wrap does virtually eliminates ovaling in the Aerotech SteelFiber iron shafts, even in the 80 gram version.

Perhaps more significant, Aerotech is one of the few, if not the only company, filament winding carbon fiber shafts.  The material is wound around the mandrel much like thread is wound on a spool. Other carbon fiber shafts are made of sheet of material wrapped around the mandrel. That can create seams, which can create radial stiffness differences around the shaft. The radial consistency of the filament wound Aerotech Steelfiber review samples measured averaged 

The technical discussion and measurements are available only to registered readers

Overall this is a great iron shaft.  If your looking to shed some weight from your irons, the 80 and 95 gram versions will do that without giving up dispersion control. With the success AeroTech is having on the professional tours, availability is now longer limited to custom fitters. AeroTech iron shafts are now available as upgrades from Bridgestone, Cleveland/Srixon, Nike, Ping, TaylorMade, Titleist and Wilson. 

  • Tom

    Hi Russ,
    I have installed an i95 stiff soft stepped once (parallel tip) version) into a iron style hybrid head. The ball flight and dispersion I’m getting is exceptional. So much so that I am considering shafting all my irons up with these shafts. I’m currently a DG S300 player and would love to pick up a few extra yards but was concerned about the total weight of the mid and short irons being too light. Are the i110 close enough in bend profile to play as an ascending weight shaft set?

    • DevotedGolfer

      Yes. I have built a set of KBS C Taper lights much the same way. R Flex hard stepped in the long irons, S flex soft stepped in the short irons. I got the distance I wanted in the long irons perhaps due to the loss of weight. Go for it, it is a interesting way to build out a set.

      • Mud Guy

        Outstanding replies Russ. It is great to hear from someone that truly knows his stuff. I currently swing AP-2’s with hard-stepped KBS Reg-shafts that I love.
        I just saw and heard of the Aero Tech SteelFiber shafts last night for the first time. The 110’s were fitted into a set of Tour M2 irons that were on cash consignment sale in a club-fitter’s small pro-shop / driving range. I am almost 60, a lifelong golf-a-holick, currently living in Malaysia. We don’t always see the “new” stuff out here.
        I was honestly star-struck & blow-away by the stellar marriage between the AT-110’s and the Tour M2 irons.
        The person putting up (the once-hit) new M2’s for sale (they were too stiff for him) wanted $650 for 4 thru PW. This seemed like a fair / great price. However, good thing I didn’t have the cash on me last night, otherwise I may have folded.

  • Nomar

    I have 3 years of playing golf and I’m 53 years old and I’m using a Regular flex Taylor made and I don’t have enough yards in my irons. If I will use this Aerotech shafts for my iron. What recommendation of grams that will fit to my experience and age?


    • DevotedGolfer

      The idea that this shaft, or any shaft for that matter will increase your distance is not true. A shaft change MAY improve your distance, but that depends on how you interact with that particular shaft design, shaft weight and how it affects the balance of your club.
      Golf is a sport and the best way to gain performance in any sport is training and fitness. If you don’t like your distance, you should get in touch with a golf fitness trainer and a swing coach. The best one can usually expect from a gear change, unless your gear is a really bad fit, is to tighten dispersion, increase accuracy, and perhaps gain a little distance from the latest technical improvements in equipment.
      I am 66 years old, and at age 64, a fitness and motion coach added 40 yards to my driver. It did not get that kind of improvement for equipment, and I have unlimited access to all the latest equipment. However, I do seek to get whatever advantage the latest shaft and gear can deliver. But that is measured in feet while fitness and skill improvements are measured in yards.