Bowling ball core · Hammer

Hammer Gauntlet Core

The core inside the Hammer Gauntlet line

An asymmetric core with mid-lane rev-up and medium flare, built for medium to heavy oil. 1 of the 10 balls with this core are in stock at BowlersMart.

  • Asymmetric
  • RG 2.501
  • Diff 0.050
  • MB 0.012
Hammer Gauntlet asymmetric core shape inside the ball

Specs

RG AT 15 LB

2.501

Mid-lane rev-up

Revs soonerRevs later

52% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.050

Medium flare

Less flareMore flare

62% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.012

Mild asymmetry

MilderStronger

11% 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 Gauntlet Core specs by ball weight (reference ball: Hammer Spawn)
Weight RG DifferentialDiff Mass biasMB
16 lb 2.512 0.044 0.011
15 lbUsed on this page 2.501 0.050 0.012
14 lb 2.517 0.050 0.012
13 lb 2.597 0.041 0.014
12 lb 2.593 0.041 0.014

Source: Hammer published specs, as listed on the Spawn 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 Hammer Gauntlet Core

1 of the 10 balls with the Hammer Gauntlet Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Hammer Spawn Bowling Ball

Hammer Spawn

Hammer HK22 C2 Solid Reactive

Medium to heavy oil

Sale price $194.95 Regular price $279.95In stock
Show 9 balls no longer available at BowlersMart
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Ball Cover First seen
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Hammer Gauntlet Axe Overseas Bowling Ball Hammer Semtex Slayer II CFI Reactive July 2018
Hammer Gauntlet Extra Overseas Bowling Ball Hammer Semtex Solid CFI Reactive July 2018
Hammer Gauntlet Caesar Overseas Bowling Ball Hammer Semtex Slayer Pearl CFI Reactive November 2018
Hammer Gauntlet Knight Overseas Bowling Ball Hammer Semtex Slayer II CFI Reactive November 2018
Hammer Gauntlet Thor Overseas Bowling Ball Hammer Semtex Slayers 3 CFI Reactive April 2019
Hammer Platinum Gauntlet Silver Overseas Bowling Ball Hammer Aggression Bite Pearl Reactive August 2019
Hammer Platinum Red Wine Gauntlet Bowling Ball Hammer Aggression Bite Pearl Reactive November 2019

Shop the 1 available balls with this core

Where the Hammer Gauntlet 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 0.055Storm Element Tour A.I. Core, RG 2.470, diff 0.035900 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 0.050Motiv 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 0.037DV8 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 0.055900 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 0.056Brunswick Infinity Core, RG 2.521, diff 0.051Storm Catalyst A.I. Core, RG 2.480, diff 0.053Hammer 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 0.048Motiv Apex Predator Core, RG 2.520, diff 0.055Storm 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 0.047Hammer 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 0.045KR 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 0.022Brunswick Rampart Core (pictured: Brunswick Combat Solid Bowling Ball)1SWAG Executioner Asymmetric Core (pictured: SWAG Executioner Solid Bowling Ball)2Radical Outer Limits Asymmetric Core (pictured: Radical Outer Limits Black Hole Bowling Ball)3DV8 Unholy Core (pictured: DV8 Heckler Hybrid Bowling Ball)4Brunswick Danger Zone Core (pictured: Brunswick Danger Zone Bowling Ball)5Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)6Hammer Gauntlet Core (pictured: Hammer Spawn 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 Gauntlet Core
Core Brand Shape RG Diff vs this core
Brunswick Combat Solid Bowling Ball1Brunswick Rampart CorePictured: Brunswick Combat Solid
 Brunswick Asymmetric 2.502 0.051 RG +0.001 · Diff +0.001
SWAG Executioner Solid Bowling Ball2SWAG Executioner Asymmetric CorePictured: SWAG Executioner Solid
 SWAG Asymmetric 2.500 0.051 RG −0.001 · Diff +0.001
Radical Outer Limits Black Hole Bowling Ball3Radical Outer Limits Asymmetric CorePictured: Radical Outer Limits Black Hole
 Radical Asymmetric 2.499 0.051 RG −0.002 · Diff +0.001
DV8 Heckler Hybrid Bowling Ball4DV8 Unholy CorePictured: DV8 Heckler Hybrid
 DV8 Asymmetric 2.504 0.051 RG +0.003 · Diff +0.001
Brunswick Danger Zone Bowling Ball5Brunswick Danger Zone CorePictured: Brunswick Danger Zone
 Brunswick Symmetric 2.501 0.048 RG 0.000 · Diff −0.002
Roto Grip Transformer Bowling Ball6Roto Grip Morph-Wing CorePictured: Roto Grip Transformer
 Roto Grip Asymmetric 2.510 0.051 RG +0.009 · Diff +0.001

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 Gauntlet Core1 of the 10 balls with the Hammer Gauntlet Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

From Hammer’s description

Questions bowlers ask

What is the RG of the Hammer Gauntlet Core?

At 15 lb the Hammer Gauntlet Core has an RG of 2.501. It ranges from 2.501 to 2.597 across the listed weights.

What is the 14 lb RG of the Hammer Gauntlet Core?

At 14 lb the RG is 2.517.

What is the differential of the Hammer Gauntlet Core?

At 15 lb the differential is 0.050. The mass bias is 0.012.

Which bowling balls use the Hammer Gauntlet Core?

Hammer Spawn Bowling Ball, Hammer Gauntlet Bowling Ball, Hammer Gauntlet Fury Overseas Bowling Ball, Hammer Gauntlet Axe Overseas Bowling Ball, Hammer Gauntlet Extra Overseas Bowling Ball. 1 are in stock now.

How do the Hammer Gauntlet Core specs change by weight?

At 16 lb: RG 2.512, differential 0.044, mass bias 0.011. At 12 lb: RG 2.593, differential 0.041, mass bias 0.014.

How does the Hammer Gauntlet 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 listed on the Spawn 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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