Compare the specs of the Roto Grip Tour Dynam-X and Roto Grip Optimum Idol 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 | Tour Dynam-X | Optimum Idol |
| Cover Name | Tour Trax Solid Reactive | MicroTrax Solid Reactive |
| Cover Type | Reactive Solid | Reactive Solid |
| Box Finish | 2000 Abralon | 2000 Abralon |
| Color | Dark Cyan / Onyx | Heliotrope Purple |
| Core Name | Rondure Tour | Ikon + AI Core Technology |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.47 | 2.47 |
| Total Diff. | 0.026 | 0.056 |
| Int. Diff. | 0.010 | 0.000 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |