Compare the specs of the Roto Grip Idol Helios and Roto Grip UFO Alert 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 | Idol Helios | UFO Alert |
| Cover Name | XtremeTrax Solid Reactive | eTrax Hybrid |
| Cover Type | Reactive Solid | Reactive Hybrid |
| Box Finish | 2000 Abralon | 1500 Grit Polished |
| Color | Radiant Orange | Purple Solid / Emerald / Teal |
| Core Name | Ikon | E.T. (Equalizer Technology) |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.49 | 2.52 |
| Total Diff. | 0.052 | 0.054 |
| Int. Diff. | 0.000 | 0.016 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |