Bowling ball core · SWAG

SWAG Insanity Symmetric Core

Symmetric SWAG core

A symmetric core with mid-lane rev-up and low flare, built for dry to medium oil, medium oil. 2 of the 2 balls with this core are in stock at BowlersMart.

  • Symmetric
  • RG 2.520
  • Diff 0.034
SWAG Insanity 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

0.034

Low flare

Less flareMore flare

17% 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.
SWAG Insanity Symmetric Core specs by ball weight (reference ball: SWAG Insanity Hybrid)
Weight RG DifferentialDiff Mass biasMB
16 lb 2.510 0.033 None
15 lbUsed on this page 2.520 0.034 None
14 lb 2.540 0.035 None
13 lb 2.560 0.032 None
12 lb 2.670 0.020 None
11 lb 2.680 0.018 None
10 lb 2.710 0.015 None

Source: SWAG published specs, as listed on the SWAG Insanity Hybrid 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 SWAG Insanity Symmetric Core

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

Hybrid covers

Hybrid covers mix solid grip with pearl length.

SWAG Insanity Hybrid Bowling Ball

SWAG Insanity Hybrid

SWAG Lunacy Hybrid AP26

Medium oil

Sale price $129.95 Regular price $189.95In stock

Pearl covers

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

SWAG Insanity Pearl Bowling Ball

SWAG Insanity Pearl

SWAG Lunacy Pearl AP26

Dry to medium oil, medium oil

Sale price $129.95 Regular price $189.95In stock

Shop the 2 available balls with this core

Where the SWAG Insanity Symmetric 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 0.047Ebonite 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 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 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 0.042Hammer 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 0.053Radical 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 0.051Motiv Sigma Core, RG 2.470, diff 0.047900 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 0.040Radical 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 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 0.047Roto 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 0.045KR 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 0.022SWAG Craze Core (pictured: SWAG Craze Hybrid Bowling Ball)1Brunswick Fury Core (pictured: Brunswick Fury Emerald Black Bowling Ball)2Brunswick Light Bulb Core (pictured: Brunswick Rhino Red Black Gold Pearl Bowling Ball)3Roto Grip Hustle Core (pictured: Roto Grip Hustle M+M Bowling Ball)4Hammer Gas Mask Low Diff Core (pictured: Hammer Black Widow Tour V1 Bowling Ball)5Ebonite Turbo Core (pictured: Ebonite Turbo X Bowling Ball)6SWAG Insanity Symmetric Core (pictured: SWAG Insanity Pearl 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 SWAG Insanity Symmetric Core
Core Brand Shape RG Diff vs this core
SWAG Craze Hybrid Bowling Ball1SWAG Craze CorePictured: SWAG Craze Hybrid
 SWAG Symmetric 2.520 0.030 RG 0.000 · Diff −0.004
Brunswick Fury Emerald Black Bowling Ball2Brunswick Fury CorePictured: Brunswick Fury Emerald Black
 Brunswick Symmetric 2.524 0.038 RG +0.004 · Diff +0.004
Brunswick Rhino Red Black Gold Pearl Bowling Ball3Brunswick Light Bulb CorePictured: Brunswick Rhino Red Black Gold Pearl
 Brunswick Symmetric 2.524 0.030 RG +0.004 · Diff −0.004
Roto Grip Hustle M+M Bowling Ball4Roto Grip Hustle CorePictured: Roto Grip Hustle M+M
 Roto Grip Symmetric 2.530 0.030 RG +0.010 · Diff −0.004
Hammer Black Widow Tour V1 Bowling Ball5Hammer Gas Mask Low Diff CorePictured: Hammer Black Widow Tour V1
 Hammer Asymmetric 2.500 0.034 RG −0.020 · Diff 0.000
Ebonite Turbo X Bowling Ball6Ebonite Turbo CorePictured: Ebonite Turbo X
 Ebonite Symmetric 2.517 0.040 RG −0.003 · Diff +0.006

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 SWAG Insanity Symmetric Core2 of the 2 balls with the SWAG Insanity Symmetric Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Hybrid coversHybrid covers mix solid grip with pearl length.

From SWAG’s description

Questions bowlers ask

What is the RG of the SWAG Insanity Symmetric Core?

At 15 lb the SWAG Insanity Symmetric Core has an RG of 2.520. It ranges from 2.510 to 2.710 across the listed weights.

What is the 14 lb RG of the SWAG Insanity Symmetric Core?

At 14 lb the RG is 2.540.

What is the differential of the SWAG Insanity Symmetric Core?

At 15 lb the differential is 0.034. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the SWAG Insanity Symmetric Core?

SWAG Insanity Pearl Bowling Ball, SWAG Insanity Hybrid Bowling Ball. 2 are in stock now.

How do the SWAG Insanity Symmetric Core specs change by weight?

At 16 lb: RG 2.510, differential 0.033. At 12 lb: RG 2.670, differential 0.020.

How does the SWAG Insanity Symmetric 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. SWAG published specs, as listed on the SWAG Insanity Hybrid product page, 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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