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Speed Regime 1

  - Callaway
The Speed Regime line of golf balls debuted in January of 2014.

The SR1 is designed for golfers with ball-speeds below 90 m.p.h. Rather than a focus on aerodynamic drag, Callaway engineers focused on creating lift at these lower speeds, for longer ball-flight. Of the three Speed Regime balls, the SR1 has the softest urethane cover.