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Pearl Reactive Bowling Ball

You hear that? That’s my competition crying.

There’s a brief moment of silence between the time I’m released and when I hit the pocket. It’s a time of reflection… tranquility… serenity. But a split second later, all hell breaks loose. The pins crash, my teammates cheer and my competitions’ egos crumble. Someone grab a mop. Things are about to get messy.

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I bring the crowd to its feet and my competition to its knees. My Late Roll 51™ core – the same core found in the Rumble™ – has good length and strong downlane motion that makes my opponents shake with nervous anticipation, all without blowing the budget.



My 51ML™ Pearl Reactive Coverstock allows me to easily clear the front part of the lane and gives me more stored energy down lane. Just when they think I’ve gone too far… BOOM! Lights out!



While my opponents are trying to figure out how to battle too much hook on the front end, the combination of my Late Roll 51™ core and brand new 51ML™ Pearl Reactive coverstock gives me more length and down-lane recovery than ever before in the HP2™ lineup. Medium/light oil conditions? I’m the one you’re looking for.



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Uproar™ Bowling Ball Technical / Specs

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Coverstock Name 51ML™
Coverstock Style Pearl
Coverstock Type Reactive
Weight Block Late Roll 51™
Color Orange Pearl / Ruby Pearl
Finish 1500-grit Polished
Finish Method Can be sanded
Durometer 73-75 on D-Scale
Flare Potential 4" - 5"/Medium-High
Weights 10lbs - 16lbs
Release Date 01/07/14


Weight Radius of
Differential PSA Differential
16 2.54 0.030 n/a
15 2.55 0.030 n/a
14 2.60 0.030 n/a
13 2.63 0.009 n/a
12 2.65 0.011 n/a
11 2.73 0.012 n/a
10 2.77 0.015 n/a

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Lane Comparison

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Compare the shot shapes of any two balls in the current Roto Grip lineup by choosing your style, any lane condition and the two balls you want to see go head-to-head.

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