Compare the specs of the Storm Zero Gravity and Storm Optimus 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 | Zero Gravity | Optimus |
| Cover Name | ERG Solid Reactive | R2X Pearl Reactive |
| Cover Type | Reactive Solid | Reactive Pearl |
| Box Finish | 4000 Grit Pad | 1500 Grit Polished |
| Color | Purple / Red | Red / White / Blue |
| Core Name | Shape-Lock LD | Tri-Sphere |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.55 | 2.48 |
| Total Diff. | 0.037 | 0.048 |
| Int. Diff. | 0.010 | 0.000 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |