Bowling ball core · Storm

Storm RAD4 Core

The core inside the Storm Code line

An asymmetric core with mid-lane rev-up and very high flare, built for medium to heavy oil. Balls with this core are no longer available at BowlersMart.

  • Asymmetric
  • RG 2.500
  • Diff 0.058
  • MB 0.020
Storm RAD4 symmetric core shape inside the ball

Specs

RG AT 15 LB

2.500

Mid-lane rev-up

Revs soonerRevs later

42% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.058

Very high flare

Less flareMore flare

96% 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.
Storm RAD4 Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.490 0.056 0.022
15 lbUsed on this page 2.500 0.058 0.020
14 lb 2.550 0.056 0.014
13 lb 2.630 0.039 0.011
12 lb 2.720 0.022 0.006

Source: Storm published specs, as shown on BowlersMart’s original Storm RAD4 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 Code?

Balls with the Storm RAD4 Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

Roto Grip Wicked Gremlin Bowling Ball

Roto Grip Wicked Gremlin

Roto Grip G-R1 Solid Reactive

Medium to heavy oil

Sale price $174.95 Regular price $249.95In stock
Hammer Black Widow 3.0 Dynasty Bowling Ball

Hammer Black Widow 3.0 Dynasty

Hammer HK22 Cohesion Solid Reactive

Medium to heavy oil

Sale price $169.95 Regular price $249.95In stock
Roto Grip Gremlin Bowling Ball

Roto Grip Gremlin

Roto Grip V-R1 Pearl Reactive

Medium to heavy oil

Sale price $154.95 Regular price $249.95In stock
Roto Grip Perfect Gem Bowling Ball

Roto Grip Perfect Gem

Roto Grip E-R1 Solid Reactive

Heavy oil, medium to heavy oil

Sale price $199.95 Regular price $289.95In stock
Storm Identity Bowling Ball

Storm Identity

Storm ReX Pearl Reactive

Medium to heavy oil

Sale price $179.95 Regular price $289.95In stock
Ebonite Go Time Bowling Ball

Ebonite Go Time

Ebonite HK22 GB 13.7 Solid Reactive

Medium to heavy oil

Sale price $149.95 Regular price $229.95In stock

Balls with the Storm RAD4 Core

None of the 22 balls with the Storm RAD4 Core are in stock at BowlersMart right now.

Show 22 balls no longer available at BowlersMart
More bowling balls with the Storm RAD4 Core
Ball Cover First seen
Storm Code Black Bowling Ball Storm R2S Pearl Reactive October 2016
Storm Code Black Limited Overseas Bowling Ball Storm NRG Solid Reactive May 2017
Storm Code Red Bowling Ball Storm R2S Hybrid Reactive May 2017
Storm Code X Bowling Ball Storm R2S Solid Reactive February 2018
Storm Critical Code Overseas Bowling Ball Storm NRG-3 Pearl Reactive August 2019
Storm Code Dynamic Overseas Bowling Ball Storm R3S Pearl Reactive May 2021
Storm Code Red Limited Overseas Bowling Ball Storm NRG Solid Reactive August 2019
Storm Secret Code Overseas Bowling Ball Storm R2S Pearl Reactive January 2020
Storm Code Platinum Overseas Bowling Ball Storm R2X Pearl Reactive January 2020
Storm Code Blue SP Overseas Bowling Ball Storm NRG Solid Reactive January 2018
Storm Code Red SP Overseas Bowling Ball Storm R3S Solid Reactive January 2016
Storm Dark Code Bowling Ball Storm ReX Pearl Reactive May 2021
Storm Code 300 Overseas Bowling Ball Storm NRG-2 Hybrid Reactive January 2022
Storm Code One Overseas Bowling Ball Storm R4S Pearl Reactive January 2022
Storm Code Master Overseas Bowling Ball Storm NeX Pearl Reactive June 2023
Storm Code Extreme Overseas Bowling Ball Storm NRG-2 Pearl Reactive July 2023
Storm The Code Overseas Bowling Ball Storm NRG Pro Solid Reactive December 2022
Storm Code Battle Overseas Bowling Ball Storm NRG-3 Hybrid Reactive September 2024
Storm Iconic Code Overseas Bowling Ball Storm NeX Pearl Reactive August 2023
Storm Code Impact X-Blem Overseas Bowling Ball Storm XT Shine Pearl Reactive July 2025
Storm Code Impact Overseas Bowling Ball Storm XT Shine Pearl Reactive January 2025
Storm Code Crush Overseas Bowling Ball Storm R2S Deep Pearl Reactive May 2026

Where the Storm RAD4 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 0.047Hammer 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 0.050Hammer Obsession Tour, RG 2.469, diff 0.034Hammer Super Offset Core, RG 2.524, diff 0.053Ebonite 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 0.029Hammer 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 2.470, 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 2.521, 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 2.632, 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 0.048Radical Outer Limits Asymmetric, RG 2.490, 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 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 2.478, 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 0.036SWAG Judge Core, RG 2.490, diff 0.052900 Global Magna AI Core, RG 2.490, diff 0.044Roto Grip Rondure Core, RG 2.490, diff 0.052Columbia 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 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, RG 2.480, diff 0.054Hammer 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 0.054Roto Grip Defense AI 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 0.055Track Criterion MD Core, RG 2.500, diff 0.052Storm Ignition Core, RG 2.490, diff 0.052Roto Grip Momentous A.I. Core, RG 2.480, diff 0.049Brunswick Portal X Core, RG 2.473, 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 0.027Hammer Gas Mask Core (pictured: Hammer Black Widow 2.0 Bowling Ball)1Roto Grip Rondure MaxD Core (pictured: Roto Grip Wicked Gremlin Bowling Ball)2Roto Grip GEM A.I. Core (pictured: Roto Grip Perfect Gem Bowling Ball)3Ebonite Big Time Core (pictured: Ebonite Go Time Bowling Ball)4Storm ID AI Core (pictured: Storm Identity Bowling Ball)5Columbia 300 Movement Core (pictured: Columbia 300 Command Solid Bowling Ball)6Storm RAD4 Core (pictured: Storm Code Crush Overseas 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 Storm RAD4 Core
Core Brand Shape RG Diff vs this core
Hammer Black Widow 2.0 Bowling Ball1Hammer Gas Mask CorePictured: Hammer Black Widow 2.0
 Hammer Asymmetric 2.500 0.058 Same RG and differential
Roto Grip Wicked Gremlin Bowling Ball2Roto Grip Rondure MaxD CorePictured: Roto Grip Wicked Gremlin
 Roto Grip Asymmetric 2.500 0.058 Same RG and differential
Roto Grip Perfect Gem Bowling Ball3Roto Grip GEM A.I. CorePictured: Roto Grip Perfect Gem
 Roto Grip Asymmetric 2.490 0.057 RG −0.010 · Diff −0.001
Ebonite Go Time Bowling Ball4Ebonite Big Time CorePictured: Ebonite Go Time
 Ebonite Symmetric 2.500 0.054 RG 0.000 · Diff −0.004
Storm Identity Bowling Ball5Storm ID AI CorePictured: Storm Identity
 Storm Asymmetric 2.510 0.055 RG +0.010 · Diff −0.003
Columbia 300 Command Solid Bowling Ball6Columbia 300 Movement CorePictured: Columbia 300 Command Solid
 Columbia 300 Asymmetric 2.510 0.053 RG +0.010 · Diff −0.005

Matches use 15 lb RG and differential.

Drilling and tools

Storm drill sheetsLayout guides for symmetric and asymmetric ballsDual angle converterTurn a pin to PAP layout into a dual angle layoutStorm layout adapterAdapt a VLS layout for speed, rev rate and axis rotation

Radial Accelerating Disk technology dates back several generations with hints of it that can be found in the RAD4 Core. It features an extremely dense modified disc shape that generates substantial torque. So much torque, it reigns supreme at the top of the Premier line with a differential higher than any other weightblock in its class.

From Storm’s description

Questions bowlers ask

What is the RG of the Storm RAD4 Core?

At 15 lb the Storm RAD4 Core has an RG of 2.500. It ranges from 2.490 to 2.720 across the listed weights.

What is the 14 lb RG of the Storm RAD4 Core?

At 14 lb the RG is 2.550.

What is the differential of the Storm RAD4 Core?

At 15 lb the differential is 0.058. The mass bias is 0.020.

Which bowling balls use the Storm RAD4 Core?

Storm Code Black Bowling Ball, Storm Code Black Limited Overseas Bowling Ball, Storm Code Red Bowling Ball, Storm Code X Bowling Ball, Storm Critical Code Overseas Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Storm RAD4 Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include Roto Grip Wicked Gremlin Bowling Ball, Hammer Black Widow 3.0 Dynasty Bowling Ball, Roto Grip Gremlin Bowling Ball, Roto Grip Perfect Gem Bowling Ball, Storm Identity Bowling Ball, Ebonite Go Time Bowling Ball.

How do the Storm RAD4 Core specs change by weight?

At 16 lb: RG 2.490, differential 0.056, mass bias 0.022. At 12 lb: RG 2.720, differential 0.022, mass bias 0.006.

How does the Storm RAD4 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. Storm published specs, as shown on BowlersMart’s original Storm RAD4 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.

Next lesson

Compare cores by RGEvery in-stock ball from lowest to highest RGCompare cores by differentialEvery in-stock ball from lowest to highest differentialAll bowling ball coresCore libraries for every brand we carryStorm core libraryEvery Storm core we have specs for