Brunswick Quantum Bias Pearl vs. Brunswick Kingpin Rule

Compare the specs of the Brunswick Quantum Bias Pearl and Brunswick Kingpin Rule 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	Brunswick	Brunswick
Ball Name	Quantum Bias Pearl	Kingpin Rule
Cover Name	ECA-XR Pearl	ECA-XR
Cover Type	Reactive Pearl	Reactive Solid
Box Finish	500 SiaAir / Crown Factory Compound	500 / 2000 SiaAir
Color	Ultramarine	Maroon / Orange / White
Core Name	Quantum Mushroom High RG Asymmetric	Kingpin Ultra Low RG
Core Type	Asymmetrical	Asymmetrical
RG	2.563	2.483
Total Diff.	0.052	0.055
Int. Diff.	0.013	0.020
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. 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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Bowling Ball Comparison Graph