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PRO-MOTION TOUR
Storm’s SPEC™ formula was featured on the original PRO-Motion which was excellent at ignoring heavy oil. In fact, it bridged the gap perfectly between R2S™ and NRG™ coverstocks. Since R2X was has been declared on the PRO-Motion Tour, users can easily identify a cleaner glide through the front with no shortage of midlane traction. The Piston Core has turned its fair share of heads, too. It’s a dynamic symmetrical piece that has some very unique characteristics. The channels on the sides of the Piston Core and the large band through the equator displaces its mass in a very specific way. This fits in the mid-range RG value that’s not too high, not too low, and continues to hit on many notes with a lot of bowlers.
Technical Specifications






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12 lbs.
Radius of Gyration
2.65
Differential
0.035
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13 lbs.
Radius of Gyration
2.59
Differential
0.045
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14 lbs.
Radius of Gyration
2.53
Differential
0.051
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15 lbs.
Radius of Gyration
2.52
Differential
0.049
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16 lbs.
Radius of Gyration
2.51
Differential
0.047