Bowling ball core · Roto Grip

Roto Grip Defense A.I. Core

Asymmetric Roto Grip core

An asymmetric core with early rev-up and high flare, built for medium to heavy oil. Balls with this core are no longer available at BowlersMart.

  • Asymmetric
  • RG 2.490
  • Diff 0.053
  • MB 0.024

Specs

RG AT 15 LB

2.490

Early rev-up

Revs soonerRevs later

32% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.053

High flare

Less flareMore flare

78% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.024

Strong asymmetry

MilderStronger

96% of the asymmetric reactive and urethane balls we stock have a lower mass bias.

RG How soon the ball revs up.Differential How much the ball can flare.Mass bias How asymmetric the core is.
Roto Grip Defense A.I. Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
15 lbUsed on this page 2.490 0.053 0.024

Other weights are not in our catalog for this core.

Looking for a ball like your Roto Grip Defense A.I.?

Balls with the Roto Grip Defense A.I. Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

SWAG Judge Bowling Ball

SWAG Judge

SWAG Witness Reactive

Medium to heavy oil

Sale price $184.95 Regular price $289.95In stock
Radical Outer Limits Black Hole Bowling Ball

Radical Outer Limits Black Hole

Radical HK22C Solid Reactive

Heavy oil

Sale price $159.95 Regular price $259.95In stock
Radical No Doubt Hybrid Bowling Ball

Radical No Doubt Hybrid

Radical Advantage Plus Hybrid Reactive

Heavy oil, medium oil

Sale price $174.95 Regular price $259.95In stock
Track Synthesis Prime Bowling Ball

Track Synthesis Prime

Track Prime Response Pearl HK22C2 Reactive

Medium to heavy oil, medium oil

Sale price $189.95 Regular price $279.95In stock
Storm Alpha Crux Bowling Ball

Storm Alpha Crux

Storm GI-26 Solid Reactive

Medium to heavy oil

Sale price $209.95 Regular price $249.95In stock
Hammer 3-D Offset Assault Bowling Ball

Hammer 3-D Offset Assault

Hammer HK22 Cohesion Hybrid Reactive

Medium to heavy oil

Sale price $144.95 Regular price $289.95In stock

Balls with the Roto Grip Defense A.I. Core

None of the 1 balls with the Roto Grip Defense A.I. Core are in stock at BowlersMart right now.

Show 1 ball no longer available at BowlersMart
More bowling balls with the Roto Grip Defense A.I. Core
Ball Cover First seen
Roto Grip Exit Red Overseas Bowling Ball Roto Grip Hyper Response Reactive July 2025

Where the Roto Grip Defense A.I. sits

Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.

Storm Element Tour A.I. Core, RG 2.470, diff 0.035DV8 Larceny Core, RG 2.471, diff 0.028DV8 Renegade Core, RG 2.499, diff 0.040Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Ebonite Big Time Core, RG 2.508, diff 0.054Hammer Stacked LED Core, RG 2.545, diff 0.047Hammer Vindicator Core, RG 2.474, diff 0.053Radical Vexed Variant Asymmetric Core, RG 2.490, diff 0.045Radical Modified Intel Symmetric Core, RG 2.483, diff 0.032Motiv Affliction V2 Core, RG 2.480, diff 0.055900 Global Conduit A.I. Core, RG 2.590, diff 0.050Roto Grip GEM A.I. Core, RG 2.490, diff 0.057Hammer Obsession Tour Core, RG 2.469, diff 0.034Hammer Super Offset Core, RG 2.524, diff 0.053Hammer Gas Mask Core, RG 2.500, diff 0.058Ebonite Turbo Core, RG 2.517, diff 0.040Ebonite Centrex Symmetrical Mass Bias Core, RG 2.466, diff 0.056Motiv Excel Core, RG 2.550, diff 0.030Motiv Detonator Core, RG 2.470, diff 0.055Storm Solarion A.I. Core, RG 2.480, diff 0.054SWAG Insanity Symmetric Core, RG 2.520, diff 0.034SWAG Fusion Core, RG 2.540, diff 0.036SWAG Watcher Symmetric Core, RG 2.510, diff 0.048SWAG Executioner Asymmetric Core, RG 2.500, diff 0.051Motiv Predator V2 Core, RG 2.470, diff 0.054Storm C3 Centripetal Control Core, RG 2.490, diff 0.029Roto Grip Rondure MaxD Core, RG 2.500, diff 0.058Hammer Vibe Core, RG 2.510, diff 0.042Hammer Aftermath Core, RG 2.520, diff 0.052Brunswick Alert Core, RG 2.478, diff 0.037Brunswick Rampart Core, RG 2.502, diff 0.051DV8 Collision Core, RG 2.462, diff 0.052Track MC2 Asym Core, RG 2.473, diff 0.046Radical Evil Eye Symmetric Core, RG 2.495, diff 0.046Ebonite Iron Fist V2 Core, RG 2.473, diff 0.053Storm Surge Core, RG 2.580, diff 0.024Roto Grip Hyped UP Core, RG 2.500, diff 0.042Roto Grip Morph-Wing Core, RG 2.510, diff 0.051Brunswick Fury Core, RG 2.524, diff 0.038Motiv Sigma Core, RG 2.470, diff 0.047Roto Grip Hustle Core, RG 2.530, diff 0.030900 Global Blast A.I. Core, RG 2.470, diff 0.055900 Global Strobe A.I. Core, RG 2.510, diff 0.052Radical Guru Core, RG 2.503, diff 0.044Track I-CORE 3.0, RG 2.486, diff 0.056DV8 Unholy Core, RG 2.504, diff 0.051Brunswick Infinity Core, RG 2.521, diff 0.051Hammer Gauntlet Core, RG 2.501, diff 0.050Hammer Raw Hammer Core, RG 2.537, diff 0.038Storm Atmos A.I. Core, RG 2.530, diff 0.042Storm Booster Core, RG 2.540, diff 0.046Track Shuttle Core, RG 2.480, diff 0.040Brunswick Light Bulb Core, RG 2.524, diff 0.030Radical Sneak Attack Core, RG 2.544, diff 0.036Motiv Gear Core, RG 2.480, diff 0.034Hammer Huntsman Core, RG 2.470, diff 0.050Hammer Super LED Core, RG 2.632, diff 0.034Ebonite Enhanced V2 Core, RG 2.480, diff 0.048DV8 Dualistic Core, RG 2.496, diff 0.045Radical Vexed Asymmetric Core, RG 2.498, diff 0.036Motiv Quadfire Core, RG 2.550, diff 0.043Track Stealth Core, RG 2.482, diff 0.056Brunswick Tiered Hexagon Core, RG 2.540, diff 0.045Columbia 300 Piranha Core, RG 2.554, diff 0.043Storm Torsion A.I. Core, RG 2.470, diff 0.050Storm Element Max A.I. Core, RG 2.470, diff 0.055Storm Radius Core, RG 2.610, diff 0.020Roto Grip Rondure Tour X Core, RG 2.480, diff 0.034SWAG Unreal Core, RG 2.510, diff 0.047SWAG Craze Core, RG 2.520, diff 0.030SWAG Serpent Asymmetric Core, RG 2.510, diff 0.048Radical Torpedo Asymmetric Core, RG 2.480, diff 0.052Motiv Overload Core, RG 2.480, diff 0.050DV8 Duality Core, RG 2.480, diff 0.036Hammer Spheroid Core, RG 2.480, diff 0.048Radical Outer Limits Asymmetric Core, RG 2.499, diff 0.051Motiv Apex Predator Core, RG 2.520, diff 0.055Brunswick Danger Zone Core, RG 2.501, diff 0.048Storm RAD-TQ Core, RG 2.560, diff 0.051Storm Velocity Core, RG 2.480, diff 0.051Hammer Modified LED Core, RG 2.586, diff 0.027Epic Spark Core, RG 2.540, diff 0.049Motiv Hadron Dual Density Core, RG 2.500, diff 0.045Track Criterion ID Core, RG 2.496, diff 0.047Brunswick Zone Asymmetric Core, RG 2.478, diff 0.048Ebonite Entity Core, RG 2.515, diff 0.052Roto Grip Rocker A.I. Core, RG 2.480, diff 0.050Motiv Flux Core, RG 2.570, diff 0.015DV8 Mantra Core, RG 2.498, diff 0.047Hammer Gas Mask Low Diff Core, RG 2.500, diff 0.034Roto Grip RST A.I. Core, RG 2.520, diff 0.055Motiv Impulse V2 Core, RG 2.550, diff 0.050SWAG APX V1 Core, RG 2.500, diff 0.042900 Global Magna A.I. Core, RG 2.490, diff 0.044Columbia 300 Pulse PowerCOR Core, RG 2.468, diff 0.045KR Strikeforce Launch Core, RG 2.530, diff 0.047900 Global Ellipse Asymmetric A.I. Core, RG 2.480, diff 0.050Motiv Halogen Core, RG 2.550, diff 0.037Storm C3 A.I. Core, RG 2.480, diff 0.031Motiv Gear APG Core, RG 2.470, diff 0.036Radical Snapshot Symmetric Core, RG 2.523, diff 0.050Hammer Huntsman Tour Core, RG 2.472, diff 0.036Hammer LED Core, RG 2.650, diff 0.015Storm Inverted Fe2 Core, RG 2.570, diff 0.046Storm Capacitor Core, RG 2.570, diff 0.022Hammer High Rev Offset Core (pictured: Hammer 3-D Offset Assault Bowling Ball)1SWAG Judge Core (pictured: SWAG Judge Bowling Ball)2Storm Catalyst A.I. Core (pictured: Storm Alpha Crux Bowling Ball)3Track I-Core Gen4 (pictured: Track Synthesis Prime Bowling Ball)4SWAG Dragon Asymmetric Core (pictured: SWAG Black Dragon Bowling Ball)5Radical No Doubt Symmetric Core (pictured: Radical No Doubt Hybrid Bowling Ball)6Roto Grip Defense A.I. Core (pictured: Roto Grip Exit Red Overseas Bowling Ball)EARLY REV-UPMID-LANELATER REV-UPHIGH FLAREMEDIUMLOW FLARE2.442.482.522.562.602.642.680.0100.0200.0300.0400.0500.060RG at 15 lbDifferential at 15 lb← Revs up soonerRevs up later →More flare ↑Less flare ↓

Nearest cores, zoomed in

Hover or tap a dot for that core’s numbers. Click a dot to open its page. Drag to move around when zoomed in. The same RG and differential do not guarantee the same ball motion.

This core 1 Nearest cores Other cores

Nearest cores to the Roto Grip Defense A.I. Core
Core Brand Shape RG Diff vs this core
Hammer 3-D Offset Assault Bowling Ball1Hammer High Rev Offset CorePictured: Hammer 3-D Offset Assault
 Hammer Asymmetric 2.489 0.053 RG −0.001 · Diff 0.000
SWAG Judge Bowling Ball2SWAG Judge CorePictured: SWAG Judge
 SWAG Asymmetric 2.490 0.052 RG 0.000 · Diff −0.001
Storm Alpha Crux Bowling Ball3Storm Catalyst A.I. CorePictured: Storm Alpha Crux
 Storm Asymmetric 2.480 0.053 RG −0.010 · Diff 0.000
Track Synthesis Prime Bowling Ball4Track I-Core Gen4Pictured: Track Synthesis Prime
 Track Asymmetric 2.480 0.053 RG −0.010 · Diff 0.000
SWAG Black Dragon Bowling Ball5SWAG Dragon Asymmetric CorePictured: SWAG Black Dragon
 SWAG Asymmetric 2.490 0.050 RG 0.000 · Diff −0.003
Radical No Doubt Hybrid Bowling Ball6Radical No Doubt Symmetric CorePictured: Radical No Doubt Hybrid
 Radical Symmetric 2.485 0.051 RG −0.005 · Diff −0.002

Matches use 15 lb RG and differential.

Drilling and tools

Drilling layoutsLayout guides for symmetric and asymmetric ballsDual angle converterTurn a pin to PAP layout into a dual angle layout

Turn on JavaScript to compare with your ball.Balls with the Roto Grip Defense A.I. CoreNone of the 1 balls with the Roto Grip Defense A.I. Core are in stock at BowlersMart right now.Show 1 ball no longer available at BowlersMartMore bowling balls with the Roto Grip Defense A.I. CoreBallCoverFirst seenRoto Grip Exit Red Overseas Bowling BallRoto Grip Hyper Response ReactiveJuly 2025Where the Roto Grip Defense A.I. sitsEach dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.All coresSymmetricAsymmetricRoto Grip onlyAny brand900 GlobalBrunswickColumbia 300DV8EboniteEpicHammerKR StrikeforceMotivRadicalRoto GripSWAGStormTrack+−ResetZoom to this coreDV8 Larceny Core, RG 2.471, diff 0.028DV8 Renegade Core, RG 2.499, diff 0.040Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Ebonite Big Time Core, RG 2.508, diff 0.054Hammer Stacked LED Core, RG 2.545, diff 0.047Hammer Vindicator Core, RG 2.474, diff 0.053Radical Vexed Variant Asymmetric Core, RG 2.490, diff 0.045Radical Modified Intel Symmetric Core, RG 2.483, diff 0.032Motiv Affliction V2 Core, RG 2.480, diff 0.055Storm Element Tour A.I. Core, RG 2.470, diff 0.035900 Global Conduit A.I. Core, RG 2.590, diff 0.050Roto Grip GEM A.I. Core, RG 2.490, diff 0.057Hammer Obsession Tour Core, RG 2.469, diff 0.034Hammer Super Offset Core, RG 2.524, diff 0.053Hammer Gas Mask Core, RG 2.500, diff 0.058Ebonite Turbo Core, RG 2.517, d

From Roto Grip’s description

Questions bowlers ask

What is the RG of the Roto Grip Defense A.I. Core?

At 15 lb the Roto Grip Defense A.I. Core has an RG of 2.490. Other weights are not in our catalog for this core.

What is the differential of the Roto Grip Defense A.I. Core?

At 15 lb the differential is 0.053. The mass bias is 0.024.

Which bowling balls use the Roto Grip Defense A.I. Core?

Roto Grip Exit Red Overseas Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Roto Grip Defense A.I. Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include SWAG Judge Bowling Ball, Radical Outer Limits Black Hole Bowling Ball, Radical No Doubt Hybrid Bowling Ball, Track Synthesis Prime Bowling Ball, Storm Alpha Crux Bowling Ball, Hammer 3-D Offset Assault Bowling Ball.

How do the Roto Grip Defense A.I. Core specs change by weight?

Other weights are not in our catalog for this core.

How does the Roto Grip Defense A.I. Core compare with my ball?

Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.

Sources and method

Specs. Catalog 15 lb figure.

Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.

Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.

Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).

Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.

Updated. Catalog and page updated 2026-10-16.

Next lesson

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