Launched alongside the Callaway Great Big Bertha Epic driver, the Sub Zero model, meanwhile, is for those looking to optimise their spin and is the most forgiving driver the company has ever produced.
As well as the Jailbreak Technology and Speed Step, the Epic Sub Zero boasts two interchangeable weights (12g and 2g) – positioned in the sole at the front and back – giving players the opportunity to adjust spin rate, launch angle and moment of inertia (MOI).
Installing the heavier weight forward lowers spin, while installing it rearward increases forgiveness and promotes higher launch and longer carry.
The Epic Sub Zero’s forgiveness is due to the make-up of the clubhead with Exo-Cage and triaxial carbon – with 50% of its surface area made from the latter.
The crown weighs a mere 10.8g and the sole panels just 7.4g, with saving so much weight meaning that the driver’s MOI is a full 42% greater than the Big Bertha Alpha 816 DBD – its predecessor.