Bowling ball core · Hammer

Hammer High Rev Offset Core

The core inside the Hammer 3-D Offset line

An asymmetric core with mid-lane rev-up and high flare, built for medium to heavy oil. 1 of the 7 balls with this core are in stock at BowlersMart.

  • Asymmetric
  • RG 2.489
  • Diff 0.053
  • MB 0.008
Hammer High Rev Offset asymmetric core shape inside the ball

Specs

RG AT 15 LB

2.489

Mid-lane rev-up

Revs soonerRevs later

34% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.053

High flare

Less flareMore flare

76% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.008

Mild asymmetry

MilderStronger

1% 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 High Rev Offset Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.501 0.046 0.007
15 lbUsed on this page 2.489 0.053 0.008
14 lb 2.505 0.053 0.008
13 lb 2.589 0.043 0.011
12 lb 2.612 0.043 0.011

Source: Hammer published specs, as shown on BowlersMart’s original Hammer High Rev Offset 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.

Balls with the Hammer High Rev Offset Core

1 of the 7 balls with the Hammer High Rev Offset Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Hammer 3-D Offset Assault Bowling Ball

Hammer 3-D Offset Assault

Hammer HK22 Cohesion Hybrid Reactive

Medium to heavy oil

Sale price $144.95 Regular price $289.95In stock
Show 6 balls no longer available at BowlersMart
More bowling balls with the Hammer High Rev Offset Core
Ball Cover First seen
Hammer 3-D Offset Attack Bowling Ball Hammer Neoflip 25 Pearl Reactive October 2022
Hammer 3-D Offset Bowling Ball Hammer Neoflex 25 Pearl Reactive February 2022
Hammer 3-D Offset Red Solid Overseas Bowling Ball Hammer Aggression NE Solid Reactive February 2022
Hammer 3-D Offset Black Solid Overseas Bowling Ball Hammer Neoflex 25 Solid Reactive November 2022
Hammer 3-D Offset Purple Silver Overseas Bowling Ball Hammer Neoflex 25 Solid Reactive June 2022
Hammer 3-D Offset Hybrid Overseas Bowling Ball Hammer Aggression NE Hybrid Reactive August 2024

Shop the 1 available balls with this core

Where the Hammer High Rev Offset 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 2.560, diff 0.032Brunswick Dual Centric Core, RG 2.500, diff 0.047Ebonite Big Time Core, RG 2.500, 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, RG 2.460, 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 2.470, diff 0.037Brunswick Rampart Core, RG 2.500, 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 2.520, 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 0.042Storm Booster Core, RG 2.540, diff 0.046Track 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 2.630, 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 0.036Motiv Quadfire Core, RG 2.550, diff 0.043Track Stealth Core, RG 2.480, diff 0.056Brunswick Tiered Hexagon Core, RG 2.540, diff 0.045Columbia 300 Piranha Core, RG 2.550, diff 0.043Storm 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 0.048Motiv 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 2.470, 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 0.036900 Global Magna AI Core, RG 2.490, diff 0.044Columbia 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 0.050Motiv Halogen Core, RG 2.550, diff 0.037Storm 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 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 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 0.054Storm Supercoil Core, RG 2.470, diff 0.053Storm Centripetal HD A.I. Core, RG 2.460, diff 0.056Hammer Modified Infamous Core, RG 2.560, 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 0.052Roto Grip Momentous A.I. Core, RG 2.480, diff 0.049Brunswick Portal X Core, RG 2.470, 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 0.053Roto Grip Defense AI Core (pictured: Roto Grip Exit Red Overseas Bowling Ball)1Storm Ignition Core (pictured: Storm Grand Gate Overseas Bowling Ball)2Roto Grip Rondure Core (pictured: Roto Grip Gremlin Bowling Ball)3SWAG Judge Core (pictured: SWAG Judge Bowling Ball)4Radical Outer Limits Asymmetric (pictured: Radical Outer Limits Solid Bowling Ball)5Storm Atomic Core (pictured: Storm PhysiX Blackout Bowling Ball)6Hammer High Rev Offset Core (pictured: Hammer 3-D Offset Assault 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: Motiv High Impulse Core Same family: Brunswick High Differential Vintage Core

This core 1 Nearest cores Other cores

Nearest cores to the Hammer High Rev Offset Core
Core Brand Shape RG Diff vs this core
Roto Grip Exit Red Overseas Bowling Ball1Roto Grip Defense AI CorePictured: Roto Grip Exit Red Overseas
 Roto Grip Asymmetric 2.490 0.053 RG +0.001 · Diff 0.000
Storm Grand Gate Overseas Bowling Ball2Storm Ignition CorePictured: Storm Grand Gate Overseas
 Storm Asymmetric 2.490 0.052 RG +0.001 · Diff −0.001
Roto Grip Gremlin Bowling Ball3Roto Grip Rondure CorePictured: Roto Grip Gremlin
 Roto Grip Asymmetric 2.490 0.052 RG +0.001 · Diff −0.001
SWAG Judge Bowling Ball4SWAG Judge CorePictured: SWAG Judge
 SWAG Asymmetric 2.490 0.052 RG +0.001 · Diff −0.001
Radical Outer Limits Solid Bowling Ball5Radical Outer Limits AsymmetricPictured: Radical Outer Limits Solid
 Radical Asymmetric 2.490 0.051 RG +0.001 · Diff −0.002
Storm PhysiX Blackout Bowling Ball6Storm Atomic CorePictured: Storm PhysiX Blackout
 Storm Asymmetric 2.480 0.053 RG −0.009 · 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

This is the 25th anniversary of the 3-D Offset, and we are excited to pay tribute to one of the greatest balls ever. The 3-D Offset offered new technology and outstanding performance. We’ve taken a lot of time and effort to introduce a ball worthy of the same name. We’ve strategically recreated this ball to remind you of the original while excelling on today’s conditions. We started with the core shape, creating a single density inner core with the same shape as the original. The original was a thick-shell ball, and we modified today’s version with a carbon fiber outer core. These modifications create more dynamic core numbers for increased ball motion potential and a durable, harder-hitting product. We’ve also made this a D.O.T. ball which further increases durability and eliminates layout and drilling restrictions.  

From Hammer’s description

Questions bowlers ask

What is the RG of the Hammer High Rev Offset Core?

At 15 lb the Hammer High Rev Offset Core has an RG of 2.489. It ranges from 2.489 to 2.612 across the listed weights.

What is the 14 lb RG of the Hammer High Rev Offset Core?

At 14 lb the RG is 2.505.

What is the differential of the Hammer High Rev Offset Core?

At 15 lb the differential is 0.053. The mass bias is 0.008.

Which bowling balls use the Hammer High Rev Offset Core?

Hammer 3-D Offset Assault Bowling Ball, Hammer 3-D Offset Attack Bowling Ball, Hammer 3-D Offset Bowling Ball, Hammer 3-D Offset Red Solid Overseas Bowling Ball, Hammer 3-D Offset Black Solid Overseas Bowling Ball. 1 are in stock now.

How do the Hammer High Rev Offset Core specs change by weight?

At 16 lb: RG 2.501, differential 0.046, mass bias 0.007. At 12 lb: RG 2.612, differential 0.043, mass bias 0.011.

How does the Hammer High Rev Offset 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 High Rev Offset 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.

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