Bowling ball core · Roto Grip

Roto Grip Nucleus Core

The core inside the Roto Grip Hyper Cell line

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

  • Asymmetric
  • RG 2.520
  • Diff 0.056
  • MB 0.018
Roto Grip Nucleus symmetric core shape inside the ball

Specs

RG AT 15 LB

2.520

Mid-lane rev-up

Revs soonerRevs later

61% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.056

Very high flare

Less flareMore flare

92% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.018

Medium asymmetry

MilderStronger

67% 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 Nucleus Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.520 0.048 0.017
15 lbUsed on this page 2.520 0.056 0.018
14 lb 2.570 0.046 0.015
13 lb 2.570 0.032 0.010
12 lb 2.590 0.029 0.008

Source: Roto Grip published specs, as shown on BowlersMart’s original Roto Grip Nucleus core page (2022). RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.

Looking for a ball like your Hyper Cell?

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

Motiv Apex Jackal Bowling Ball

Motiv Apex Jackal

Motiv Propulsion MXV Pearl Reactive

Heavy oil

Sale price $219.95 Regular price $289.95In stock
Roto Grip RST Hyperdrive Pearl Bowling Ball

Roto Grip RST Hyperdrive Pearl

Roto Grip U-R1 Pearl Reactive

Medium to heavy oil

Sale price $169.95 Regular price $289.95In stock
Hammer Zero Mercy Solid Bowling Ball

Hammer Zero Mercy Solid

Hammer HK22 C2 Solid Reactive

Medium to heavy oil

Sale price $194.95 Regular price $279.95In stock
Ebonite Go Time Bowling Ball

Ebonite Go Time

Ebonite HK22 GB 13.7 Solid Reactive

Medium to heavy oil

Sale price $149.95 Regular price $229.95In stock
Hammer Fallout Bowling Ball

Hammer Fallout

Hammer HK22 C2 Solid Reactive

Medium to heavy oil

Sale price $169.95 Regular price $269.95In stock
900 Global Viking Conquest Bowling Ball

900 Global Viking Conquest

900 Global RB 94 Solid Reactive

Medium to heavy oil

Sale price $209.95 Regular price $299.95In stock

Balls with the Roto Grip Nucleus Core

None of the 7 balls with the Roto Grip Nucleus Core are in stock at BowlersMart right now.

Show 7 balls no longer available at BowlersMart
More bowling balls with the Roto Grip Nucleus Core
Ball Cover First seen
Roto Grip Hyper Cell Skid Bowling Ball Roto Grip 73MH Pearl Reactive November 2014
Roto Grip Eternal Cell Bowling Ball Roto Grip 75M Solid Reactive October 2015
Roto Grip Hot Cell Bowling Ball Roto Grip Radioactive Solid Urethane June 2017
Roto Grip Hyper Cell Fused Bowling Ball Roto Grip eTrax-H18 Hybrid Reactive December 2017
Roto Grip Nuclear Cell Bowling Ball Roto Grip eTrax-P20 Pearl Reactive January 2020
Roto Grip Huge Cell Overseas Bowling Ball Roto Grip Wildfire Pearl Reactive May 2022
Roto Grip Hyper Cell Motion Overseas Bowling Ball Roto Grip eTrax-H18 Hybrid Reactive May 2022

Where the Roto Grip Nucleus 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 0.040Track I-Core Gen4, RG 2.480, diff 0.053Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Hammer 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 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 Dragon Asymmetric Core, RG 2.490, diff 0.050SWAG 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 0.042Brunswick 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 0.053Radical No Doubt Symmetric Core, RG 2.485, diff 0.051Storm 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 0.051Storm Catalyst A.I. Core, RG 2.480, diff 0.053Hammer 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 0.051Brunswick 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 0.048Roto 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 0.034Motiv Impulse V2 Core, RG 2.550, diff 0.050SWAG APX V1 Core, RG 2.500, diff 0.042SWAG Judge Core, RG 2.490, diff 0.052900 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 High Rev Offset Core, RG 2.489, diff 0.053Hammer 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 0.022Motiv Apex Predator Core (pictured: Motiv Apex Jackal Bowling Ball)1Roto Grip RST A.I. Core (pictured: Roto Grip RST Hyperdrive Bowling Ball)2Hammer Super Offset Core (pictured: Hammer Zero Mercy Solid Bowling Ball)3Ebonite Big Time Core (pictured: Ebonite Go Time Bowling Ball)4Hammer Aftermath Core (pictured: Hammer Fallout Bowling Ball)5Ebonite Entity Core (pictured: Ebonite Entity Pearl Bowling Ball)6Roto Grip Nucleus Core (pictured: Roto Grip Huge Cell 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.

Same family: Roto Grip Nucleus A.I. Core

This core 1 Nearest cores Other cores

Nearest cores to the Roto Grip Nucleus Core
Core Brand Shape RG Diff vs this core
Motiv Apex Jackal Bowling Ball1Motiv Apex Predator CorePictured: Motiv Apex Jackal
 Motiv Asymmetric 2.520 0.055 RG 0.000 · Diff −0.001
Roto Grip RST Hyperdrive Bowling Ball2Roto Grip RST A.I. CorePictured: Roto Grip RST Hyperdrive
 Roto Grip Asymmetric 2.520 0.055 RG 0.000 · Diff −0.001
Hammer Zero Mercy Solid Bowling Ball3Hammer Super Offset CorePictured: Hammer Zero Mercy Solid
 Hammer Asymmetric 2.524 0.053 RG +0.004 · Diff −0.003
Ebonite Go Time Bowling Ball4Ebonite Big Time CorePictured: Ebonite Go Time
 Ebonite Symmetric 2.508 0.054 RG −0.012 · Diff −0.002
Hammer Fallout Bowling Ball5Hammer Aftermath CorePictured: Hammer Fallout
 Hammer Symmetric 2.520 0.052 RG 0.000 · Diff −0.004
Ebonite Entity Pearl Bowling Ball6Ebonite Entity CorePictured: Ebonite Entity Pearl
 Ebonite Asymmetric 2.515 0.052 RG −0.005 · Diff −0.004

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 Nucleus CoreNone of the 7 balls with the Roto Grip Nucleus Core are in stock at BowlersMart right now.Show 7 balls no longer available at BowlersMartMore bowling balls with the Roto Grip Nucleus CoreBallCoverFirst seenRoto Grip Hyper Cell Skid Bowling BallRoto Grip 73MH Pearl ReactiveNovember 2014Roto Grip Eternal Cell Bowling BallRoto Grip 75M Solid ReactiveOctober 2015Roto Grip Hot Cell Bowling BallRoto Grip Radioactive Solid UrethaneJune 2017Roto Grip Hyper Cell Fused Bowling BallRoto Grip eTrax-H18 Hybrid ReactiveDecember 2017Roto Grip Nuclear Cell Bowling BallRoto Grip eTrax-P20 Pearl ReactiveJanuary 2020Roto Grip Huge Cell Overseas Bowling BallRoto Grip Wildfire Pearl ReactiveMay 2022Roto Grip Hyper Cell Motion Overseas Bowling BallRoto Grip eTrax-H18 Hybrid ReactiveMay 2022Where the Roto Grip Nucleus 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 0.040Track I-Core Gen4, RG 2.480, diff 0.053Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Hammer Stacked LED Core, RG 2.545, diff 0.047Hammer Vindicator Core, RG 2.474, diff 0.053Radical

From Roto Grip’s description

Questions bowlers ask

What is the RG of the Roto Grip Nucleus Core?

At 15 lb the Roto Grip Nucleus Core has an RG of 2.520. It ranges from 2.520 to 2.590 across the listed weights.

What is the 14 lb RG of the Roto Grip Nucleus Core?

At 14 lb the RG is 2.570.

What is the differential of the Roto Grip Nucleus Core?

At 15 lb the differential is 0.056. The mass bias is 0.018.

Which bowling balls use the Roto Grip Nucleus Core?

Roto Grip Hyper Cell Skid Bowling Ball, Roto Grip Eternal Cell Bowling Ball, Roto Grip Hot Cell Bowling Ball, Roto Grip Hyper Cell Fused Bowling Ball, Roto Grip Nuclear Cell Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Roto Grip Nucleus Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include Motiv Apex Jackal Bowling Ball, Roto Grip RST Hyperdrive Pearl Bowling Ball, Hammer Zero Mercy Solid Bowling Ball, Ebonite Go Time Bowling Ball, Hammer Fallout Bowling Ball, 900 Global Viking Conquest Bowling Ball.

How do the Roto Grip Nucleus Core specs change by weight?

At 16 lb: RG 2.520, differential 0.048, mass bias 0.017. At 12 lb: RG 2.590, differential 0.029, mass bias 0.008.

How does the Roto Grip Nucleus 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. Roto Grip published specs, as shown on BowlersMart’s original Roto Grip Nucleus core page (2022), as published by the manufacturer.

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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