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I don’t want to be given respect. I’d rather take it.

Powerful guts and determined grit? I was born with them. I’ve been able to cut through the grime since my first day out of the mold. But my disdain for the status quo, my insatiable thirst for domination and my heart are a product of my upbringing. My mentor, the Defiant™, has shown me what it takes to be a revolutionary, and the time has come to put everything he’s taught me into action. It’s time to defy all odds, logic and expectations – again.

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Same core. Same Defiance.

If my mentor has taught me one thing, it’s that defiance starts from within. Featuring the same technological advancement found in the Defiant™, the unique elliptical shape of my Paragon™ core defines predictability of axis migration and allows you to perfectly match up your ball reaction to the conditions at hand. The pins won’t even know what hit ‘em.

The Bite gets a Shine.

You may have never associated pearls with destruction before, but I’m about to change all that. My MicroBite™ pearl reactive coverstock uses extremely small structured additives to help smooth the transitions while maintaining entry angle at the pocket. This helps you create better pin action while reducing oil sensitivity that can send your ball through the break point. Powerful and smooth, like a beefed up Don Juan.

Less oil doesn’t mean less power.

Confident. Cocky. Call it what you want, but I’m telling you right now, I am the ideal complement to the original Defiant. I provide the perfect combination of skid-hook-roll, even on medium-heavy oil. Separate, we’re still the baddest to ever hit the lanes. But together, we’re unstoppable.


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Defiant Edge™ Bowling Ball Technical / Specs

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Coverstock Name MicroBite™™
Coverstock Style Pearl
Coverstock Type Reactive
Weight Block Paragon™
Color Red/Black/Electric Blue
Finish 1500-grit Polished
Durometer 73-75 on D-Scale
Flare Potential 7+ Inches/High
Weights 12lbs - 16lbs
Release Date 07/10/12


Weight Radius of
Differential PSA Differential
16 2.49 0.052 0.017
15 2.49 0.054 0.017
14 2.52 0.053 0.016
13 2.57 0.032 0.010
12 2.59 0.029 0.008

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Lane Comparison

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to Glory.

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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Lane Condition

Balls to Compare


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700 series
Last week of summer league and I bowled 197,242,299. Bowled in a House that I only bowl in the summer....
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Defiant Edge = front 25 for Jodi Sabalauskas
On 3/27/13 talented PA female bowler Jodi Sabalauskas showed up to bowl her usual Wed. Night Miller Classic...
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Honor Scores

300 Game
Chuck Salerno
Cohoes, New York
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300 Game
Ian Robinett
Manhattan, Kansas
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300 Game
Ron Sementelli
Lockport, New York
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In the News

2013 TAT Highlights
TAT - Finals
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Roto Grip Defiant Edge Ball Review
Defiant Edge Video Ball Review
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