Sr 1 golf ball optimized aerodynamics for 90 mph amp under swing speed tour level control amp superior spin separationoptimized aerodynamics for more distance at moderate swing speeds here is an incredible game changing fact the sr 1 has been designed to have the best aerodynamic performance for moderate swing speeds of 90mph and below so yes if the first digit of your swing speed is 0 to 8 wersquore talking directly to you our hex pattern is specifically engineered to optimize l