Compare the specs of the Roto Grip UFO Alert and Roto Grip Idol Synergy 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 | Roto Grip | Roto Grip |
| Ball Name | UFO Alert | Idol Synergy |
| Cover Name | eTrax Hybrid | eTrax |
| Cover Type | Reactive Hybrid | Reactive Hybrid |
| Box Finish | 1500 Grit Polished | 1500 Grit Polished |
| Color | Purple Solid / Emerald / Teal | Amethyst Pearl / Magenta Solid |
| Core Name | E.T. (Equalizer Technology) | Ikon |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.52 | 2.49 |
| Total Diff. | 0.054 | 0.052 |
| Int. Diff. | 0.016 | 0.000 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |