One-Piece or Different Shafts

From time to time, we are asked if other kinds of shafts can be installed. The short answer is no. The following paragraphs describe the reasons.

There are two standard diameters of shafts available in the golf industry. Iron and putter shafts are typically .370” diameter. Driver shafts are .335” diameter. Each one delivers the appropriate flex for the significantly different length and weight of irons vs. drivers. Interestingly, a lot of people assume that driver heads are heavier because they are larger, but that is not the case. The driver is, in fact, the lightest club in the bag.

Our adjustable head is the size and weight of a 4-iron. That would normally require a .370” shaft to prevent bending or kinking at the end of the hosel. But we designed it to receive a .335” diameter shaft which is required to achieve the necessary final length of the 3-section shaft. In order to make it strong enough to withstand the bending force from the 4-iron weight, we also insert a custom chamfered 4” long carbon steel thin-wall tube in the tip-end to prevent bending.

Said another way, a .370 iron shaft will not fit into the hosel, and if you install a non-telescoping .335” shaft, it will be too flexible and will likely bend if it is a steel shaft, or break if it is graphite.

A related question we often receive is, “Why don’t we just use a .370 inch diameter iron shaft?” There are two reasons: 1) Because .370” iron shafts are not long enough to cut and telescope to the desired final length. 2) Overlapping a .370 shaft would make it too stiff. One of our competitors uses a .395” “over the hosel” shaft which is long enough, but too stiff in one piece, and super-stiff when cut and overlapped for telescopic use.

We use extra long .335” driver shafts from True Temper, and cut them into three pieces. That allows a closed length of about 18” (much shorter than a 2-piece shaft would be) and an extended length of 38.5”. That would not be possible with an iron shaft.

While a one-piece driver shaft would be too flexible for our 4-iron head weight, the overlapping sections of our .335” telescopic shaft yields a standard flex.

Therefore, installing standard steel or graphite driver shafts will bend or break at the hosel, AND they will be too flexible.

If you are used to frequency-matched clubs that were custom built just for you, remember that when you go out with the Whole-In-One Club, you are not expecting the same kind of game. It replicates all the lofts, but everything else about it is different. For instance, if you set it to a 9-iron but take a full grip and swing, it will hit much higher and farther than your traditional 9-iron because the shaft is longer and it develops more club-head speed. So there is some mental and physical adjustment that you will do with this club and it is therefore not necessary to have the same shafts as your full set.

And the bottom line is that our shaft is fantastic, as demonstrated by the amazing results of the robot lab testing compared to traditional irons. Plainly said, there are no shafts on the planet that will perform better than our 3-piece telescopic shaft. We even have customers who ask us to install them in all the irons in their traditional set…not for portability, but because of their performance.

So we do not offer or recommend one-piece or any other shafts. If you do not need the telescopic portability, just leave it extended and use it as a full-length club.

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