Compare the specs of the Storm Pro-Motion and Storm Gravity Evolve side by side in the ball comparison table below. To view the full bowling ball review for one of these balls, click the ball name link in the table below.
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| Brand | Storm | Storm |
| Ball Name | Pro-Motion | Gravity Evolve |
| Cover Name | SPEC Solid Reactive | SPEC Solid Reactive |
| Cover Type | Reactive Solid | Reactive Solid |
| Box Finish | 2000 Abralon | 2000 Abralon |
| Color | Steel Blue | Gunmetal / Fire / Crimson |
| Core Name | Piston | Shape-Lock HD |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.52 | 2.48 |
| Total Diff. | 0.049 | 0.052 |
| Int. Diff. | 0.000 | 0.020 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |