Hammer Black Widow Pink vs. Roto Grip Idol Pearl vs. Storm Phaze II

Compare the specs of the Hammer Black Widow Pink, Roto Grip Idol Pearl, and Storm Phaze II 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	Hammer	Roto Grip	Storm
Ball Name	Black Widow Pink	Idol Pearl	Phaze II
Cover Name	Aggression Pearl CFI	eTrax-P18	TX-16 (Traction-X 2016)
Cover Type	Reactive Pearl	Reactive Pearl	Reactive Solid
Box Finish	500 / 1000 Abralon / Powerhouse Factory Finish Polish	1500 Grit Polished	3000 Abralon
Color	Pink Pearl	Royal / Amethyst	Red / Blue / Purple
Core Name	Gas Mask	Ikon	Velocity
Core Type	Asymmetrical	Symmetrical	Symmetrical
RG	2.50	2.49	2.48
Total Diff.	0.058	0.052	0.051
Int. Diff.	0.016	0.000	0.000
Torque Length Back End Total Hook Ball Tester Ratings	See Performance Ratings... Already a premium member? Click here to log in.

The graph below shows a visual comparison of the selected balls. Click on each colored circle in the graph to see that ball’s name and ratings. Click the circle again or click the ball's name to view that ball’s full review.

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Bowling Ball Comparison Graph