Roto Grip RST X-2 vs. Roto Grip UFO Alert

Compare the specs of the Roto Grip RST X-2 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.

Click here to add or remove balls from this comparison.

Roto Grip RST X-2
Roto Grip UFO Alert
Ball NameRST X-2UFO Alert
Cover NameeTrax PLUS PearleTrax Hybrid
Cover TypeReactive PearlReactive Hybrid
Box Finish1500 Grit Polished1500 Grit Polished
ColorTanzanitePurple Solid / Emerald / Teal
Core NameRST (Roto Star Tour)E.T. (Equalizer Technology)
Core TypeAsymmetricalAsymmetrical
Total Diff.0.0530.054
Int. Diff.0.0160.016



Back End

Total Hook

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.

Filter by Date
Filter by Torque
Filter by Back End
Torque Legend:
Back End Legend:

For more information about our bowling ball testing and review process, please click here.