Compare the specs of the Roto Grip Idol Cosmos and Roto Grip RST X-3 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 Cosmos | RST X-3 |
| Cover Name | XtremeTrax Pearl Reactive | MicroTrax Hybrid |
| Cover Type | Reactive Pearl | Reactive Hybrid |
| Box Finish | 4000 Abralon | 4K - Fast |
| Color | Stardust Teal | Yellow / Smoke / Grape |
| Core Name | Ikon | RST (Roto Star Tour) |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.49 | 2.53 |
| Total Diff. | 0.052 | 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. | |