KBS TGI Vs SteelFiber Shaft Comparison Overview

Graphite iron shafts are hit and miss – in my experience, mostly miss.

It’s really hard to strike that perfect balance between speed/forgiveness and control/stability.

So I was really intrigued when I read about the SteelFiber shaft. It is a graphite shaft with, you guessed it, steel fibers infused into it.

When I got the SteelFiber shaft in for testing, I wanted to compare it to one of the best graphite iron shafts I’ve ever swung: the KBS TGI shaft.

Read on to see how the SteelFiber fared.

KBS TGI Shaft Overview

“The TGI shaft runs the gamut from a 60g version to a 110g version. There are also regular, regular+, stiff, stiff+, stiff++, extra stiff and extra stiff+ options.”

I stuck with my preferred extra stiff (100g) flex for this test. The KBS TGI has a stiff tip section which goes a long way towards giving this lightweight shaft more control.

The bend point is in the middle but you have to swing surprisingly hard to notice it.

Again, this is one of the best graphite iron shafts I’ve ever tested because of how stable it is.

At a much lighter weight point, you can get close to the control of steel with this shaft. The transition is exceptionally smooth and the club head stays true to your swing path.

SteelFiber Shaft Overview

“The SteelFiber is available in weights from 74g to 125g. Stiff, extra stiff, regular, ladies and senior flexes are also available.”

I tested the SteelFiber in stiff flex at 110 grams. The first thing I noticed was the incredibly low torque.

Right away, I was reminded of a steel shaft. But the responsiveness was definitely indicative of a graphite shaft.

I loved the low spin rates and tight dispersion this shaft yielded.

I did find it a bit more difficult to correct face angles compared to the TGI shaft; but it didn’t have much effect on accuracy. Even on heavy loads this shaft seemed to resist ovalling very well.

“I would say the feel/stability combination of the KBS TGI shaft still reigns supreme; but the SteelFiber certainly gives it a run for its money.

Both of these shafts are excellent for anyone who needs a lighter shaft that offers the control of steel shafts.”

KBS TGI First Impressions

Our first few swings with the KBS TGI informed us that it was light and airy and produces mid-high launch.

Key Features & Performance

The KBS TGI features the E.I. curve that is used for KBS’s steel shafts.

This feature is partly responsible for the consistency and enhanced control you get from this shaft.

KBS TGI Iron Review

You get a bit of smash factor help from the flex of this shaft; but more importantly, the flexion stays the same throughout your set so you know exactly what to expect from each iron.

KBS TGI Wedges Review

The relatively high spin rate comes in handy in the wedges. If you play on a course that demands soft landings on the green, you will really appreciate the KBS TGI.

KBS TGI Pros & Cons

Pros:

Clean look
Very stable
Tight dispersion
Good club head control
Efficient energy transfer

Cons:

A bit pricey
High spin rates in the long irons

Overall Score: 96/100

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Aerotech Steelfiber i95 First Impressions

The first thing that most of us noticed about this shaft was how light it was.

Moderate swing speed players would have the best time with this shaft; but we could also see slow swingers benefit from it as well.

Key Features & Performance

We suspect that the smooth feel and transition you get from this shaft has to do with its gradient stiffness.

The shaft starts out with a flexible graphite core that is reinforced with 59 miles worth of tiny steel fibers.

Aerotech Steelfiber i95 Irons Review

The Aerotech Steelfiber i95 is a great distance-increaser in the long and mid irons. Just be careful not to swing outside of yourself with your short irons.

Aerotech Steelfiber i95 Wedges Review

We were getting good spin with this shaft when we plugged it into our wedges. As long as you can make consistent contact with your wedges, the Aerotech Steelfiber i95 will help you stick any kind of green.