Bowling ball core · Roto Grip

Roto Grip Neutron Core

Symmetric Roto Grip core

A symmetric core with later rev-up, more length and medium flare, built for medium oil. Balls with this core are no longer available at BowlersMart.

  • Symmetric
  • RG 2.550
  • Diff 0.042
Roto Grip Neutron symmetric core shape inside the ball

Specs

RG AT 15 LB

2.550

Later rev-up, more length

Revs soonerRevs later

87% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.042

Medium flare

Less flareMore flare

36% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

None

Symmetric core

Symmetric cores have no mass bias marker to place when drilling.

RG How soon the ball revs up.Differential How much the ball can flare.Mass bias How asymmetric the core is.
Roto Grip Neutron Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.560 0.046 None
15 lbUsed on this page 2.550 0.042 None
14 lb 2.600 0.044 None
13 lb 2.670 0.017 None
12 lb 2.670 0.017 None

Source: Roto Grip published specs, as shown on BowlersMart’s original Roto Grip Neutron 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 Roto Grip Neutron?

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

Motiv Supra Sport Bowling Ball

Motiv Supra Sport

Motiv Leverage MFS Reactive

Dry to medium oil, medium oil

Sale price $184.95 Regular price $229.95In stock
Columbia 300 Piranha Solid Bowling Ball

Columbia 300 Piranha Solid

Columbia 300 HyperFlex Reactive

Medium to heavy oil

Sale price $104.95 Regular price $279.95In stock
Brunswick Crown Victory Pearl Bowling Ball

Brunswick Crown Victory Pearl

Brunswick Savvy Hook Pearl Reactive

Medium to heavy oil

Sale price $149.95 Regular price $239.95In stock
Motiv Max Thrill Hybrid Bowling Ball

Motiv Max Thrill Hybrid

Motiv Turmoil XP3 Hybrid Reactive

Dry to medium oil

Sale price $129.95 Regular price $179.95In stock
Hammer Blacklist Bowling Ball

Hammer Blacklist

Hammer HK22 Cohesion Pearl Reactive

Medium oil

Sale price $169.95 Regular price $269.95In stock
Storm Monsoon Bowling Ball

Storm Monsoon

Storm Reactor Solid

Medium oil

Sale price $139.95 Regular price $209.95In stock

Balls with the Roto Grip Neutron Core

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

Show 1 balls no longer available at BowlersMart
More bowling balls with the Roto Grip Neutron Core
Ball Cover First seen
Roto Grip Wreck It Bowling Ball Roto Grip Psyched Hybrid Reactive August 2016

Where the Roto Grip Neutron sits

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

DV8 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 0.047Ebonite Big Time Core, RG 2.500, diff 0.054Hammer 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, 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 2.510, diff 0.040Ebonite Centrex Symmetrical Mass Bias, RG 2.460, diff 0.056Motiv Excel Core, RG 2.550, diff 0.030Motiv Detonator Core, RG 2.470, diff 0.055Storm Solarion AI Core, RG 2.480, diff 0.054SWAG Insanity Symmetric Core, RG 2.520, diff 0.034SWAG Fusion Symmetric Core, RG 2.540, diff 0.036SWAG Watcher Symmetric Core, RG 2.510, diff 0.048SWAG Dragon Asymmetric Core, RG 2.480, diff 0.054SWAG 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 2.470, diff 0.046Radical Evil Eye Symmetric Core, RG 2.490, diff 0.046Ebonite Iron Fist V2 Core, RG 2.470, diff 0.053Radical No Doubt Symmetric Core, RG 2.480, 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 AI Core, RG 2.470, diff 0.055900 Global Strobe AI Core, RG 2.510, diff 0.052Radical Guru Core, RG 2.500, diff 0.044Track I-CORE 3.0, RG 2.480, diff 0.056DV8 Unholy Core, RG 2.500, diff 0.051Brunswick Infinity Core, RG 2.521, diff 0.051Storm Catalyst Core, RG 2.500, diff 0.052Hammer 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 0.042Track Shuttle Core, RG 2.490, diff 0.038Brunswick Light Bulb Core, RG 2.524, diff 0.030Radical Sneak Attack Core, RG 2.540, 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 2.490, diff 0.045Radical Vexed Asymmetric Core, RG 2.490, diff 0.036Track Stealth Core, RG 2.480, diff 0.056Storm Torsion AI Core, RG 2.470, diff 0.050Storm Element Max AI 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 0.054Motiv Overload, 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, RG 2.490, 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 LED Resin Bowling Ball 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 2.490, diff 0.047Brunswick Zone Asymmetric Core, RG 2.478, diff 0.048Ebonite Entity Core, RG 2.510, diff 0.052Roto Grip Rocker AI Core, RG 2.480, diff 0.050Motiv Flux Core, RG 2.570, diff 0.015DV8 Mantra Core, RG 2.490, diff 0.047Hammer Gas Mask Low Diff Core, RG 2.500, diff 0.034Roto Grip RST Core + AI, RG 2.520, diff 0.055Motiv Impulse V2 Core, RG 2.550, diff 0.050SWAG APX V1 Core, RG 2.500, diff 0.042SWAG Fusion Core, RG 2.540, diff 0.036SWAG Judge Core, RG 2.490, diff 0.052900 Global Magna AI Core, RG 2.490, diff 0.044Roto Grip Rondure Core, RG 2.490, diff 0.052Columbia 300 Pulse PowerCOR, RG 2.460, diff 0.045Storm Element Tour A.I. Core, RG 2.470, diff 0.035KR Strikeforce KR Launch Core, RG 2.530, diff 0.047900 Global Ellipse Asymmetric A.I. Core, RG 2.480, diff 0.050Storm C3 + AI Core, RG 2.480, diff 0.031Motiv Gear APG, RG 2.470, diff 0.036Radical Snapshot Symmetric Core, RG 2.520, 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 0.022Storm Velocity A.I. Core, RG 2.470, diff 0.053Storm Atomic Core, RG 2.480, diff 0.053Storm RAD-X Asymmetric, RG 2.480, diff 0.054Storm ID AI Core, RG 2.510, diff 0.055Hammer FAB Asymmetric, RG 2.550, diff 0.051Columbia 300 Shifter Core, RG 2.470, diff 0.050Radical Modified Intel Symmetric, RG 2.480, diff 0.032Columbia 300 Columbia Ricochet Core, RG 2.480, diff 0.054Roto Grip Defense AI Core, RG 2.490, diff 0.053Storm Supercoil Core, RG 2.470, diff 0.053Storm Centripetal HD A.I. Core, RG 2.460, diff 0.056Hammer Modified Infamous Core, RG 2.567, diff 0.049Brunswick Ethos Core, RG 2.480, diff 0.053Hammer Hazmat Core, RG 2.470, diff 0.055Track Criterion MD Core, RG 2.500, diff 0.052Storm Ignition Core, RG 2.490, diff 0.052Roto Grip Momentous A.I. Core, RG 2.480, diff 0.049Brunswick Portal X Core, RG 2.473, diff 0.054Ebonite Emerge Core, RG 2.510, diff 0.053Radical Katana Core, RG 2.500, diff 0.050900 Global Meditate LD Symmetric Core, RG 2.560, diff 0.027Columbia 300 Movement Core, RG 2.510, diff 0.053Columbia 300 Piranha Core (pictured: Columbia 300 Piranha Solid Bowling Ball)1Motiv Quadfire Core (pictured: Motiv Supra Clutch Bowling Ball)2Brunswick Tiered Hexagon Core (pictured: Brunswick Crown Victory Bowling Ball)3Storm Booster Core (pictured: Storm Rocket AI Bowling Ball)4Motiv Halogen Core (pictured: Motiv Max Thrill Hybrid Bowling Ball)5Hammer Stacked LED Core (pictured: Hammer Blacklist Bowling Ball)6Roto Grip Neutron Core (pictured: Roto Grip Wreck It 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 Neutron NXT Core

This core 1 Nearest cores Other cores

Nearest cores to the Roto Grip Neutron Core
Core Brand Shape RG Diff vs this core
Columbia 300 Piranha Solid Bowling Ball1Columbia 300 Piranha CorePictured: Columbia 300 Piranha Solid
 Columbia 300 Symmetric 2.550 0.043 RG 0.000 · Diff +0.001
Motiv Supra Clutch Bowling Ball2Motiv Quadfire CorePictured: Motiv Supra Clutch
 Motiv Symmetric 2.550 0.043 RG 0.000 · Diff +0.001
Brunswick Crown Victory Bowling Ball3Brunswick Tiered Hexagon CorePictured: Brunswick Crown Victory
 Brunswick Symmetric 2.540 0.045 RG −0.010 · Diff +0.003
Storm Rocket AI Bowling Ball4Storm Booster CorePictured: Storm Rocket AI
 Storm Symmetric 2.540 0.046 RG −0.010 · Diff +0.004
Motiv Max Thrill Hybrid Bowling Ball5Motiv Halogen CorePictured: Motiv Max Thrill Hybrid
 Motiv Symmetric 2.550 0.037 RG 0.000 · Diff −0.005
Hammer Blacklist Bowling Ball6Hammer Stacked LED CorePictured: Hammer Blacklist
 Hammer Symmetric 2.545 0.047 RG −0.005 · Diff +0.005

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

The Neutron core boasts a lower RG and higher differential when compared to the Photon core this transforms into an earlier read and stronger backend reaction. The late-rolling Neutron core is a model of consistency, producing good length and strong motion down-lane.  

From Roto Grip’s description

Questions bowlers ask

What is the RG of the Roto Grip Neutron Core?

At 15 lb the Roto Grip Neutron Core has an RG of 2.550. It ranges from 2.550 to 2.670 across the listed weights.

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

At 14 lb the RG is 2.600.

What is the differential of the Roto Grip Neutron Core?

At 15 lb the differential is 0.042. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the Roto Grip Neutron Core?

Roto Grip Wreck It Bowling Ball. 0 are in stock now.

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

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include Motiv Supra Sport Bowling Ball, Columbia 300 Piranha Solid Bowling Ball, Brunswick Crown Victory Pearl Bowling Ball, Motiv Max Thrill Hybrid Bowling Ball, Hammer Blacklist Bowling Ball, Storm Monsoon Bowling Ball.

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

At 16 lb: RG 2.560, differential 0.046. At 12 lb: RG 2.670, differential 0.017.

How does the Roto Grip Neutron 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 Neutron core page (2022), as published by the manufacturer.

Baseline. The baseline is 265 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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