The King of Them All!

DARK STAR™, Bowling Ball

Shield Line

Value and Performance have always been synonymous with the Roto Grip® brand, and the all new Dark Star™ stands to continue that tradition.

Our first goal was to develop a stronger Shield™ Line ball to fit into the Roto Grip® line. The Team felt that there was too big of a gap between the Nomads and the Planet series balls. The intent was to create more mid-lane read with stronger backend motion, so we developed the Photon™ core with a lower RG value and a higher differential.

To enhance this core motion we also added Ultimate Vision™ pearl coverstock to this ball. This performance proven coverstock was found on the EPIC™ and Illusion™ series of balls. It boasts a higher coefficient of friction and surface texture for added traction in the oil and superior backend performance.

This combination of core and coverstock was the ideal fit into the line. Our tests showed that it filled the gap between the Nomads and the Planet series balls perfectly.

The legacy of value and performance will live on in the new Dark Star™.

DARK STAR™ Ball Facts

Coverstock	Ultimate Vision™ Pearl  Reactive
Weight Block	Photon™ Core
Ball Color	Dark Blue / Purple
Ball Finish	1500 Polished
Durometer	75-78 Rex D-scale
Flare Potential	3-4 Inches (Med)
Weights	10 - 16 lbs.
SKU#	BBMRDS

DARK STAR™ Ball Dynamics

Ball Weight	Radius of Gyration	Differential	Mass Bias Diff.
16#	2.56	0.040
15#	2.58	0.040
14#	2.59	0.040
13#	2.69	0.034
12#	2.70	0.021
11#	2.73	0.012
10#	2.77	0.015

Drill Specifications

• reactiondrillchart.pdf

More Resources

• Crazy 8™
• Downloads
• Videos
• Reaction Chart
• Coverstock Comparisons
• Ball Chart
• Coverstock Maintenance

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