Compare the specs of the Roto Grip Idol Cosmos and Roto Grip RST X-2 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.
Click here to add or remove balls from this comparison.
 |  | |
| Brand | Roto Grip | Roto Grip |
| Ball Name | Idol Cosmos | RST X-2 |
| Cover Name | XtremeTrax Pearl Reactive | eTrax PLUS Pearl |
| Cover Type | Reactive Pearl | Reactive Pearl |
| Box Finish | 4000 Abralon | 1500 Grit Polished |
| Color | Stardust Teal | Tanzanite |
| 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. | |