Compare the specs of the Roto Grip Gem and Roto Grip TNT 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 | Gem | TNT |
| Cover Name | MicroTrax Solid Reactive | eTrax PLUS Solid |
| Cover Type | Reactive Solid | Reactive Solid |
| Box Finish | 2000 Abralon | 2000 Abralon |
| Color | Citrine / Ruby / Amethyst | Amber / Fire / Blaze Orange |
| Core Name | Defiant LRG | Torpex |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.47 | 2.47 |
| 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. | |