Bowling ball core · Ebonite

Ebonite Entity Core

Asymmetric Ebonite core

An asymmetric core with mid-lane rev-up and high flare, built for medium to heavy oil. 2 of the 2 balls with this core are in stock at BowlersMart.

  • Asymmetric
  • RG 2.515
  • Diff 0.052
  • MB 0.020
Ebonite Entity asymmetric core shape inside the ball

Specs

RG AT 15 LB

2.515

Mid-lane rev-up

Revs soonerRevs later

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

DIFFERENTIAL AT 15 LB

0.052

High flare

Less flareMore flare

72% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.020

Strong asymmetry

MilderStronger

82% 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.
Ebonite Entity Core specs by ball weight (reference ball: Ebonite Entity Pearl)
Weight RG DifferentialDiff Mass biasMB
16 lb 2.525 0.047 0.017
15 lbUsed on this page 2.515 0.052 0.020
14 lb 2.532 0.052 0.020
13 lb 2.597 0.041 0.014
12 lb 2.593 0.041 0.014

Source: Ebonite published specs, as listed on the Ebonite Entity Pearl product page. 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.

Balls with the Ebonite Entity Core

2 of the 2 balls with the Ebonite Entity Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Solid covers

Solid covers grip the lane soonest and suit heavier oil.

Ebonite Entity Bowling Ball

Ebonite Entity

Ebonite Optimize Solid Reactive

Medium to heavy oil

Sale price $114.95 Regular price $279.99In stock

Pearl covers

Pearl covers go longer and turn harder at the end, best on medium oil.

Ebonite Entity Pearl Bowling Ball

Ebonite Entity Pearl

Ebonite Optimize Pearl Reactive

Medium to heavy oil

Sale price $129.95 Regular price $279.99In stock

Shop the 2 available balls with this core

Where the Ebonite Entity 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 2.508, 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 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 0.042Brunswick 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 0.055Radical Guru Core, RG 2.503, diff 0.044Track I-CORE 3.0, RG 2.486, diff 0.056DV8 Unholy Core, RG 2.504, diff 0.051Storm 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 0.051Motiv 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 0.048Roto 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 0.034Roto 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 0.042SWAG 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 0.045Storm Element Tour A.I. Core, RG 2.470, diff 0.035KR 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 0.022Storm Velocity A.I. Core, RG 2.470, diff 0.053Storm Atomic Core, RG 2.480, diff 0.053Storm RAD-X Asymmetric Core, RG 2.480, diff 0.054Storm ID A.I. Core, RG 2.510, diff 0.055Hammer FAB Asymmetric Core, RG 2.550, diff 0.051Columbia 300 Shifter Core, RG 2.478, diff 0.050Columbia 300 Ricochet Core, RG 2.488, diff 0.054Roto Grip Defense A.I. 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 0.055Roto Grip Momentous A.I. Core, RG 2.480, diff 0.049Track Criterion MD Core, RG 2.500, diff 0.052Storm Ignition Core, RG 2.490, diff 0.052Brunswick Portal X Core, RG 2.473, diff 0.054Radical Katana Core, RG 2.500, diff 0.050900 Global Meditate LD Symmetric Core, RG 2.560, diff 0.027Columbia 300 Movement Core (pictured: Columbia 300 Command Solid Bowling Ball)1900 Global Strobe A.I. Core (pictured: 900 Global Viking Bowling Ball)2Ebonite Emerge Core (pictured: Ebonite Emerge Hybrid Bowling Ball)3Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)4Brunswick Infinity Core (pictured: Brunswick Infinity Quest Bowling Ball)5Hammer Aftermath Core (pictured: Hammer Fallout Bowling Ball)6Ebonite Entity Core (pictured: Ebonite Entity 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 Ebonite Entity Core
Core Brand Shape RG Diff vs this core
Columbia 300 Command Solid Bowling Ball1Columbia 300 Movement CorePictured: Columbia 300 Command Solid
 Columbia 300 Asymmetric 2.513 0.053 RG −0.002 · Diff +0.001
900 Global Viking Bowling Ball2900 Global Strobe A.I. CorePictured: 900 Global Viking
 900 Global Asymmetric 2.510 0.052 RG −0.005 · Diff 0.000
Ebonite Emerge Hybrid Bowling Ball3Ebonite Emerge CorePictured: Ebonite Emerge Hybrid
 Ebonite Asymmetric 2.510 0.053 RG −0.005 · Diff +0.001
Roto Grip Transformer Bowling Ball4Roto Grip Morph-Wing CorePictured: Roto Grip Transformer
 Roto Grip Asymmetric 2.510 0.051 RG −0.005 · Diff −0.001
Brunswick Infinity Quest Bowling Ball5Brunswick Infinity CorePictured: Brunswick Infinity Quest
 Brunswick Asymmetric 2.521 0.051 RG +0.006 · Diff −0.001
Hammer Fallout Bowling Ball6Hammer Aftermath CorePictured: Hammer Fallout
 Hammer Symmetric 2.520 0.052 RG +0.005 · Diff 0.000

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 Ebonite Entity Core2 of the 2 balls with the Ebonite Entity Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Solid coversSolid covers grip the lane soonest and suit heavier oil.

From Ebonite’s description

Questions bowlers ask

What is the RG of the Ebonite Entity Core?

At 15 lb the Ebonite Entity Core has an RG of 2.515. It ranges from 2.515 to 2.597 across the listed weights.

What is the 14 lb RG of the Ebonite Entity Core?

At 14 lb the RG is 2.532.

What is the differential of the Ebonite Entity Core?

At 15 lb the differential is 0.052. The mass bias is 0.020.

Which bowling balls use the Ebonite Entity Core?

Ebonite Entity Pearl Bowling Ball, Ebonite Entity Bowling Ball. 2 are in stock now.

How do the Ebonite Entity Core specs change by weight?

At 16 lb: RG 2.525, differential 0.047, mass bias 0.017. At 12 lb: RG 2.593, differential 0.041, mass bias 0.014.

How does the Ebonite Entity 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. Ebonite published specs, as listed on the Ebonite Entity Pearl product page, 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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