Compare the specs of the Roto Grip Gem and Roto Grip UFO Alert 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||UFO Alert|
|Cover Name||MicroTrax Solid Reactive||eTrax Hybrid|
|Cover Type||Reactive Solid||Reactive Hybrid|
|Box Finish||2000 Abralon||1500 Grit Polished|
|Color||Citrine / Ruby / Amethyst||Purple Solid / Emerald / Teal|
|Core Name||Defiant LRG||E.T. (Equalizer Technology)|
Ball Tester Ratings
Bowling Ball Comparison Graph
The graph below shows a visual comparison of the selected balls. Hover over each colored circle in the graph to see that ball’s name and ratings. Click a circle to view that ball’s full review.
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