Known for their aerodynamically angled sole, the SIM drivers of last year changed how shape improves speed. This update of the SIM platform is a fundamental change in how that head is made. The goal is to increase forgiveness for three types of players through a construction that eliminates titanium from everywhere except the face and replaces it almost entirely with lightweight carbon fiber. This frees up more mass to be redistributed so that the low-spin (SIM2), mid-launch (SIM2 Max) or anti-slice (SIM2 Max·D) users get more bang at impact, wherever that impact might be. First, two carbon-fiber shells form the top and bottom to save weight. They are joined by a light, forged-aluminum ring that circles the perimeter and locks into a titanium cupface that has a variable thickness precisely milled in the back. Finally, the tungsten weight in the angled keel is heavier and farther back than before to stabilize off-center hits. The design features a more responsive sole slot and a resin injected behind the face to push the springlike-effect limits. Read more >>