Whats the differance between GI and SGI irons?
Christopher Duran
Updated on April 06, 2026
Game improvement or Super Game improvement. Hmmm....tough.....
I've never quite understood; I mean Callaway Big Berthas are far more fat and ugly than X-series irons, and yet no more forgiving. G15s are SGI and yet a fairly conservative compared to some of the monster hybrid sets available.
JPX800s have finally got into the SGI category too, and they almost look like a regular cavity.