Sr 2 golf ball optimized aerodynamics for 90 105 mph swing speeds tour level control amp superior spin separationoptimized aerodynamics for more distance at moderate swing speeds here is a simple game changing fact the sr 2 has been designed to have the best aerodynamic performance for athletic swing speeds between 90mph and 105mph so yes if your swing speed falls in this range wersquore talking directly to you our hex pattern is specifically engineered to reduce drag at high speed