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Hybrid Reactive Bowling Ball

I don’t even hear their music.

I make my own.

Whoever said it’s impossible to be all things to all people hasn’t met me. The power to compose the perfect line down the lane? I’ve got that. Remarkable harmony between my coverstock and core? Darn right. I possess the same inner strength as my predecessors, the Defiant™ and Defiant Edge™. And like my brothers before me, I break my competitors’ spirits and leave them weeping in their seats. Defy all odds? Watch me.

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Dont Mess With Perfection.

When the Defiant™ was born, Roto Grip tried to break the mold. I wouldn’t let them. Inside me, you’ll find the same groundbreaking Paragon™ core that gives the Defiant and Defiant Edge™ their heavy and continuous roll from the midlane through the backend. My confident predictability will help you break pins – and your opponents’ psyche.

The Perfect Mix of Melody and Harmony.

When some hear "solid/pearl reactive," they call it an oxymoron. The thing is, when you’re the champ, you can say whatever you want. My 77H™ hybrid reactive coverstock is the perfect blend of solid and pearl. I give you the ease of a pearl reactive through the frontend and the smooth reaction of a solid at the breakpoint. I’m defiantly harmonious.

More Oil Than a Roadside Café.

Heavy oil? Pfft. Bring it on. With my 4000 Abralon® finish, I create more length than the original Defiant, but more reaction in heavier oil than the Defiant Edge. I conquer medium/heavy and heavy oil with ease. In fact, I cut through so much oil, even deep fryers quiver in my presence.






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Defiant Soul™ Bowling Ball Technical / Specs

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Coverstock Name 77H™
Coverstock Style Hybrid
Coverstock Type Reactive
Weight Block Paragon™
Color Green & Gold Pearl/Purple Solid
Finish 4000-grit Abralon®
Finish Method None
Durometer 73-75 on D-Scale
Flare Potential 7+ Inches/High
Weights 12lbs - 16lbs
Release Date 01/08/13


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

View The Many Paths
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.

Your Style

Lane Condition

Balls to Compare


800 Series with Defiant Soul
On September 9, 2014 the first night of fall league, I had a hard time choosing which ball to use. I...
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Castelli Rolls 300 With a Defiant Soul
After 23 years off the lanes, I am back to bowling. I have many new friends, many teaching me the latest...
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First PBA Regional Tour Casher
I bowled the PBA Midwest regional tour at Bowl-a-vard Lanes in Madison,WI on may 4th 2014. I qualified...
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Honor Scores

800 Series
Cody Bell
York, Pennsylvania
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800 Series
Joe Claspell
Lake Havasu City, Arizona
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300 Game
Mike Daley
Liverpool, New York
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In the News

John Szczerbinski Reflects on Open Championships Performance...
John Szczerbinski - Open Championships
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2013 PBA Badger Open Update
PBA Badger Open Update
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2013 PBA Badger Open Update Matchplay
PBA Badger Open Update Matchplay
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2013 TAT Highlights
TAT - Finals
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Another Show for Wes...Sterner Almost Perfect!
Malott - 2013 PBA Don Carter Classic
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Disturbed and Defiant Soul again make splash at USBC OC in Reno!
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Haugen Wins with Defiant Soul at PBA Mark Roth Classic...
Haugen - Defiant Soul
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Lennie Boresch Jr. Brings Another PBA50 Win Home for Roto Grip!
Lennie Boresch Jr. - Win
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Marshall Kent Conquers Brunswick Euro Challenge with Disturbed...
Kent - Brunswick Euro Challenge
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Roto Grip Announces New Balls Coming January 8th, 2013!
Roto Grip is proud to announce a new member in each of the HP4™,HP3™ & HP2™ lines...
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Roto Grip Staffer John Szczerbinski takes lead in two events at OC in Reno
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Roto Grip U.S Open Update
U.S Open update
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Schlem Talks Defiant Soul
Schlem - Defiant Soul
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Szczerbinski, Weber Lead KingPins To Elias Cup Title...
Szczerbinsk - KingPins
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Totally Defiant is Bowlers Journal 2013 Ball of The Year
Totally Defiant - Bowlers Journal
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Totally Defiant, Deranged, Rumble Are Here!
Totally Defiant, Deranged, Rumble Release
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View All News

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