Callaway GBB Epic Sub-Zero Driver Review

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  • At a glance

  • TG Rating 5 out of 5
  • Owner Rating Not yet rated
  • RRP £469.00

What we say...


Callaway GBB Epic Sub Zero Driver Review: Tech

Jailbreak technology sees two titanium rods connect the crown to the sole behind the face which Callaway say stiffens up the head for faster ball speeds. An exo-cage body structure is paired with a carbon crown and sole, making it possible to position the CG inline with the neutral axis, to control spin. 12g and 2g sole weights can be interchanged to lower spin or increase launch and MOI, while a speed step crown improves aerodynamics for quicker club speeds.

RELATED: Callaway's 2021 Epic woods revealed and tested

Callaway GBB Epic Sub Zero Driver Review: Our verdict

It doesn’t take too much detective work to decipher Callaway’s Epic drivers are very good. When Rory puts one in his bag without any sort of Callaway contract you know it’s because it performs. And if you’ve thought “Sub Zero” CG drivers are just for hard hitters then think again. As both our amateur testers saw slightly better results with the Sub Zero over the “mainstream” Epic which has to say so long as you’ve got enough launch you can seriously benefit from the Sub Zero’s extra forgiveness (so long as the Epic’s 12g weight is in the back port). Callaway reckon their new Jailbreak tech increases ball speeds and we’d have to agree, as for two of our three testers it produced their fastest average ball speeds, and because of its such strong performance TG Ed Chris Jones has slipped one in his bag for 2017.      

Callaway Epic Sub Zero driver

Everything you need to know about driver shaft weight. And why it's now more important than flex. 

Callaway GBB Epic Sub Zero Driver Review: Bottom line

Callaway’s Epic drivers weigh in with huge price tags, but then they’ve got tech which no other brand can talk about. They promised increased performance and our data supports their claims. If you’re on a mission to find 2017’s longest driver you simply cannot miss the Epic Sub Zero off your shortlist.    

Product Information

Lofts: 9deg, 10.5deg

Stock shafts: Aldila Rogue MAX, Project X HZRDUS, Fujikura Pro Green

Adjustable hosel: Yes

How much loft change: -1deg / +2deg

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