Compare the specs of the Roto Grip Optimum Idol and Roto Grip Magic Gem 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 | Optimum Idol | Magic Gem |
| Cover Name | MicroTrax Solid Reactive | MicroTrax Hybrid Reactive |
| Cover Type | Reactive Solid | Reactive Hybrid |
| Box Finish | 2000 Abralon | 2000 Abralon |
| Color | Heliotrope Purple | Citrine / Rhodonite / Jet |
| Core Name | Ikon + AI | Defiant LRG |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.47 | 2.47 |
| Total Diff. | 0.056 | 0.053 |
| Int. Diff. | 0.000 | 0.016 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |