Compare the specs of the Roto Grip RST X-1 and Roto Grip Idol Helios 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 | RST X-1 | Idol Helios |
| Cover Name | MicroTrax Hybrid | XtremeTrax Solid Reactive |
| Cover Type | Reactive Hybrid | Reactive Solid |
| Box Finish | 3000 Abralon | 2000 Abralon |
| Color | Black / Dark Forest / Forest Pearl | Radiant Orange |
| Core Name | RST (Roto Star Tour) | Ikon |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.53 | 2.49 |
| Total Diff. | 0.053 | 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. | |