How to adjust your Callaway EPIC Flash driver

Thomas Tanner
Mar 26, 2021
5 minutes

The Callaway EPIC Flash driver is available in two models - standard and Sub Zero, which both feature the same adjustability in the form of a sliding weight around the perimeter as well as Callaway's Opti-Fit hosel. The Sub Zero does feature an additional weight port that knocks the spin rate down by moving the CG towards the face, which can be changed, but this is not recommended unless done by a club-fitter.

Let's get adjusting

First, take a look at the opening and locking mechanisms of the hosel screw. To open or loosen the shaft screw, place the wrench (which will have come with the driver) into the top of the screw and turn anti-clockwise. To tighten the screw, turn it clockwise. When fully tightened, there will be an audible "CLICK" to let you know the sleeve is safely locked in place and to avoid over-tightening.

In both EPIC Flash drivers, a 16-gram sliding weight runs around the back of the head. You can loosen this weight with the adjustable wrench and move it to any position along the rail. The factory setting is neutral, with the weight halfway along the track, and in this setting, the driver will be at its most stable and forgiving.

What happens when you move the weight?

Slide the weight towards the heel (see DRAW in the track), and this big movement of mass will have the effect of promoting a draw or anti-slice bias on your drives. If you struggle with a fade or want to correct a slice, this setting will help you. Just lock it in, wait for the click, and away you go.

Conversely, if you slide the 16-gram weight towards the toe, this creates a fade or anti-hook bias on shots. So if your poor drive tends to be a hook, try this setting to correct it.

And, of course, you can secure the weight anywhere along the track to make the changes more gradual or subtly.

What about the hosel?

You can also adjust loft and lie via Callaway's Opti-Fit hosel. Looking at the markings on the hosel, you'll notice there's a little dash or line above and below the cogs. When adjusting the Opti-Fit hosel, the Golden Rule is to have these little lines lined up at all times!

When the shaft screw is fully opened, the head can be easily removed from the shaft, and you'll immediately notice the top and bottom cogs can turn independently of each other, and these indicate some of the different loft and lie options you can choose.

What are your options?

You can add up to 2-degrees of loft or reduce it to 1-degree lower than stated. Then for each loft, you can choose an N for neutral and a D for draw setting.

Loft first!

The key to setting up the Opti-Fit hosel is to focus on finding your desired loft first.

You want to hit the driver a little higher and bring up the spin a little line up +1 with the little hyphen. While holding that in place, you have two options, N for Neutral and D for Draw.

Line up N or D and reattach the head, ensuring your settings are lined up between the hyphens and tighten to the 'CLICK'.

If you want to flight the ball a little lower and reduce spin, you can lower the loft by 1-degree. Spin the top cog until -1 lines up with the hyphen, then spin the other cog to choose Neutral or Draw pop the head back on, make sure the lines match and tighten to the 'CLICK'.

And you're ready to go!!

So that is how to adjust your EPIC Flash and EPIC Flash Sub Zero driver. We advise first finding the best setting for you on the weight track at the back and then dialling in your loft and lie with the hosel adjustment.

And it is very important to remember that you can adjust your driver on the range or at any time before or after your round, just not during it!

Further reading

The Callaway EPIC Max, Max LS, and Speed drivers are laden with Artificial Intelligence and the 2021 additions to the Callaway EPIC family of drivers. All three models have the Callaway OptiFit Hosel to adjust loft and lie. The Max and Max LS also have an adjustable sliding weight in the sole to influence shot shape.

Rick Shiels came to Golfbidder with a question. How much difference is there between each of Callaway’s 24 driver releases in the last 5 years? We did not know, so we teamed up with Rick, providing every driver from the period, ready for a test.