Bowling ball core · Hammer

Hammer FAB Asymmetric Core

Asymmetric Hammer core

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

  • Asymmetric
  • RG 2.550
  • Diff 0.051
  • MB 0.014
Hammer FAB Asymmetric asymmetric 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

0.051

High flare

Less flareMore flare

68% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.014

Mild asymmetry

MilderStronger

18% 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.
Hammer FAB Asymmetric Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.530 0.051 0.014
15 lbUsed on this page 2.550 0.051 0.014
14 lb 2.620 0.045 0.014
13 lb 2.580 0.043 Not listed

Source: Hammer published specs, as shown on BowlersMart’s original Hammer FAB Asymmetric 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 Hammer FAB Asymmetric?

Balls with the Hammer FAB Asymmetric Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

Motiv Primal Ghost Bowling Ball

Motiv Primal Ghost

Motiv Coercion HFS (High Friction Solid) Reactive

Medium oil

Sale price $169.95 Regular price $259.95In stock
Storm Next Factor Bowling Ball

Storm Next Factor

Storm R3S Pearl Reactive

Medium oil

Sale price $119.95 Regular price $289.95In stock
Epic Ignite Solid Red White Black Bowling Ball

Epic Ignite Solid Red White Black

Epic Fire Solid Reactive

Dry to medium oil

Sale price $79.95 Regular price $129.95In stock
Hammer Blacklist Bowling Ball

Hammer Blacklist

Hammer HK22 Cohesion Pearl Reactive

Medium oil

Sale price $169.95 Regular price $269.95In stock
Brunswick Crown 78U Bowling Ball

Brunswick Crown 78U

Brunswick Urethane Solid 78D

Dry to medium oil

Sale price $134.95 Regular price $249.95In stock
Storm Rocket AI Bowling Ball

Storm Rocket AI

Storm A1S Pearl Reactive

Medium oil

Sale price $154.95 Regular price $269.95In stock

Balls with the Hammer FAB Asymmetric Core

None of the 3 balls with the Hammer FAB Asymmetric Core are in stock at BowlersMart right now.

Show 3 balls no longer available at BowlersMart
More bowling balls with the Hammer FAB Asymmetric Core
Ball Cover First seen
Hammer Red Pearl Urethane Asym Overseas Bowling Ball Hammer Pearl Urethane June 2024
Hammer Purple Solid Urethane Overseas Bowling Ball Hammer Solid Urethane June 2024
Hammer Purple Solid Urethane Overseas 2ND QUALITY Bowling Ball Hammer Solid Urethane April 2026

Where the Hammer FAB Asymmetric 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 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 0.042Hammer 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 0.051Brunswick 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 0.042Track 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 0.056Columbia 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 Velocity Core, RG 2.480, diff 0.051Hammer Modified LED Core, RG 2.586, diff 0.027Motiv 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 0.055SWAG 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 Impulse V2 Core (pictured: Motiv Primal Ghost Bowling Ball)1Storm RAD-TQ Core (pictured: Storm Next Factor Bowling Ball)2Epic Spark Core (pictured: Epic Ignite Solid Red White Black Bowling Ball)3Hammer Stacked LED Core (pictured: Hammer Blacklist Bowling Ball)4Storm Booster Core (pictured: Storm Rocket AI Bowling Ball)5Brunswick Tiered Hexagon Core (pictured: Brunswick Crown Victory Bowling Ball)6Hammer FAB Asymmetric Core (pictured: Hammer Purple Solid Urethane Overseas 2ND QUALITY 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 Hammer FAB Asymmetric Core
Core Brand Shape RG Diff vs this core
Motiv Primal Ghost Bowling Ball1Motiv Impulse V2 CorePictured: Motiv Primal Ghost
 Motiv Symmetric 2.550 0.050 RG 0.000 · Diff −0.001
Storm Next Factor Bowling Ball2Storm RAD-TQ CorePictured: Storm Next Factor
 Storm Asymmetric 2.560 0.051 RG +0.010 · Diff 0.000
Epic Ignite Solid Red White Black Bowling Ball3Epic Spark CorePictured: Epic Ignite Solid Red White Black
 Epic Symmetric 2.540 0.049 RG −0.010 · Diff −0.002
Hammer Blacklist Bowling Ball4Hammer Stacked LED CorePictured: Hammer Blacklist
 Hammer Symmetric 2.545 0.047 RG −0.005 · Diff −0.004
Storm Rocket AI Bowling Ball5Storm Booster CorePictured: Storm Rocket AI
 Storm Symmetric 2.540 0.046 RG −0.010 · Diff −0.005
Brunswick Crown Victory Bowling Ball6Brunswick Tiered Hexagon CorePictured: Brunswick Crown Victory
 Brunswick Symmetric 2.540 0.045 RG −0.010 · 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 Hammer FAB Asymmetric CoreNone of the 3 balls with the Hammer FAB Asymmetric Core are in stock at BowlersMart right now.Show 3 balls no longer available at BowlersMartMore bowling balls with the Hammer FAB Asymmetric CoreBallCoverFirst seenHammer Red Pearl Urethane Asym Overseas Bowling BallHammer Pearl UrethaneJune 2024Hammer Purple Solid Urethane Overseas Bowling BallHammer Solid UrethaneJune 2024Hammer Purple Solid Urethane Overseas 2ND QUALITY Bowling BallHammer Solid UrethaneApril 2026Where the Hammer FAB Asymmetric sitsEach dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.All coresSymmetricAsymmetricHammer onlyAny brand900 GlobalBrunswickColumbia 300DV8EboniteEpicHammerKR StrikeforceMotivRadicalRoto GripSWAGStormTrack+−ResetZoom to this coreStorm 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 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

From Hammer’s description

Questions bowlers ask

What is the RG of the Hammer FAB Asymmetric Core?

At 15 lb the Hammer FAB Asymmetric Core has an RG of 2.550. It ranges from 2.530 to 2.620 across the listed weights.

What is the 14 lb RG of the Hammer FAB Asymmetric Core?

At 14 lb the RG is 2.620.

What is the differential of the Hammer FAB Asymmetric Core?

At 15 lb the differential is 0.051. The mass bias is 0.014.

Which bowling balls use the Hammer FAB Asymmetric Core?

Hammer Red Pearl Urethane Asym Overseas Bowling Ball, Hammer Purple Solid Urethane Overseas Bowling Ball, Hammer Purple Solid Urethane Overseas 2ND QUALITY Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Hammer FAB Asymmetric Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include Motiv Primal Ghost Bowling Ball, Storm Next Factor Bowling Ball, Epic Ignite Solid Red White Black Bowling Ball, Hammer Blacklist Bowling Ball, Brunswick Crown 78U Bowling Ball, Storm Rocket AI Bowling Ball.

How do the Hammer FAB Asymmetric Core specs change by weight?

At 16 lb: RG 2.530, differential 0.051, mass bias 0.014. The 12 lb values are not listed.

How does the Hammer FAB Asymmetric 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. Hammer published specs, as shown on BowlersMart’s original Hammer FAB Asymmetric 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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