Bowling ball core · Storm

Storm Inverted Fe2 Core

Symmetric Storm core

A symmetric core with later rev-up, more length and medium flare, built for medium oil. 1 of the 25 balls with this core are in stock at BowlersMart.

  • Symmetric
  • RG 2.570
  • Diff 0.046
Storm Inverted Fe2 symmetric core shape inside the ball

Specs

RG AT 15 LB

2.570

Later rev-up, more length

Revs soonerRevs later

92% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.046

Medium flare

Less flareMore flare

44% 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.
Storm Inverted Fe2 Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.520 0.058 None
15 lbUsed on this page 2.570 0.046 None
14 lb 2.580 0.037 None
13 lb 2.590 0.045 None
12 lb 2.650 0.035 None

Source: Storm published specs, as shown on BowlersMart’s original Storm Inverted Fe2 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.

3 balls on this core list different numbers
  • Storm Hy-Road Gold Pearl Overseas Bowling Ball: RG 2.520, diff 0.058, mass bias Not listed at 15 lb
  • Storm My Way Pro Overseas Bowling Ball: RG 2.530, diff 0.055, mass bias Not listed at 15 lb
  • Storm Hyroad Punch Overseas Bowling Ball: RG 2.550, diff 0.045, mass bias Not listed at 15 lb

Balls with the Storm Inverted Fe2 Core

1 of the 25 balls with the Storm Inverted Fe2 Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Storm Hy-Road Bowling Ball

Storm Hy-Road

Storm R2S Hybrid Reactive

Medium oil

Sale price $139.95 Regular price $229.95In stock
Show 24 balls no longer available at BowlersMart
More bowling balls with the Storm Inverted Fe2 Core
Ball Cover First seen
Storm Hy-Road X-Comp Bowling Ball Storm R2S Hybrid Reactive May 2026
Storm Hy-Road 40 Bowling Ball Storm A1S Pearl Reactive May 2025
Storm HyRoad Solid Bowling Ball Storm R2S Solid Reactive May 2014
Storm HyRoad Nano Bowling Ball Storm NRG Solid Reactive October 2017
Storm Hy-Road Pearl Bowling Ball Storm R2S Pearl Reactive July 2019
Storm All Road Bowling Ball Storm NRG Hybrid Reactive September 2019
Storm Hyroad Rush Overseas Bowling Ball Storm R3X Pearl Reactive August 2019
Storm Hyroad Purple Overseas Bowling Ball Storm R2S Hybrid Reactive August 2019
Storm Hyroad 300 SE Overseas Bowling Ball Storm R2S Pearl Reactive August 2019
Storm Hyroad Fly Overseas Bowling Ball Not listed August 2019
Storm Hy-Road Gold Pearl Overseas Bowling Ball Storm R2X Pearl Reactive March 2021
Storm Hyroad 300 Overseas Bowling Ball Storm R2S Pearl Reactive January 2021
Storm Hyroad T Overseas Bowling Ball Storm R2S Pearl Reactive August 2020
Storm HyRoad Max Bowling Ball Storm NeX Solid Reactive January 2021
Storm My Way Pro Overseas Bowling Ball Storm R3S Hybrid Reactive January 2014
Storm Hyroad Wave Overseas Bowling Ball Storm NRG Pearl Reactive January 2021
Storm Night Road Bowling Ball Storm ReX Pearl Reactive June 2022
Storm Hyroad Nano SE Overseas Bowling Ball Storm NRG Solid Reactive June 2022
Storm Hyroad Wild Overseas Bowling Ball Not listed June 2022
Storm Star Road Overseas Bowling Ball Storm NRG Solid Reactive November 2022
Storm Night Road SE Overseas Bowling Ball Storm R2S Pearl Reactive November 2022
Storm Fight Road Overseas Bowling Ball Storm R3X Pearl Reactive January 2023
Storm Hyroad Punch Overseas Bowling Ball Storm R2S Deep Pearl Reactive January 2024
Storm Hyroad Pink Pearl Overseas Bowling Ball Storm R2S Pearl Reactive September 2023

Shop the 1 available balls with this core

Where the Storm Inverted Fe2 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 0.055Roto 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 0.036Track Stealth Core, RG 2.480, diff 0.056Brunswick Tiered Hexagon Core, RG 2.540, diff 0.045Storm 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 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 0.055SWAG 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 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 0.054Storm 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 0.054Roto 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 0.056Brunswick 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 2.470, 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 0.053Hammer Modified Infamous Core (pictured: Hammer Anger Solid Bowling Ball)1Storm RAD-TQ Core (pictured: Storm Next Factor Bowling Ball)2Columbia 300 Piranha Core (pictured: Columbia 300 Piranha Solid Bowling Ball)3Motiv Quadfire Core (pictured: Motiv Supra Clutch Bowling Ball)4Motiv Impulse V2 Core (pictured: Motiv Primal Ghost Bowling Ball)5900 Global Conduit A.I. Core (pictured: 900 Global Portal Bowling Ball)6Storm Inverted Fe2 Core (pictured: Storm Hy-Road 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: Storm Inverted Fe2 A.I. Core Same family: 900 Global Inverted Dome Symmetric Core

This core 1 Nearest cores Other cores

Nearest cores to the Storm Inverted Fe2 Core
Core Brand Shape RG Diff vs this core
Hammer Anger Solid Bowling Ball1Hammer Modified Infamous CorePictured: Hammer Anger Solid
 Hammer Symmetric 2.560 0.049 RG −0.010 · Diff +0.003
Storm Next Factor Bowling Ball2Storm RAD-TQ CorePictured: Storm Next Factor
 Storm Asymmetric 2.560 0.051 RG −0.010 · Diff +0.005
Columbia 300 Piranha Solid Bowling Ball3Columbia 300 Piranha CorePictured: Columbia 300 Piranha Solid
 Columbia 300 Symmetric 2.550 0.043 RG −0.020 · Diff −0.003
Motiv Supra Clutch Bowling Ball4Motiv Quadfire CorePictured: Motiv Supra Clutch
 Motiv Symmetric 2.550 0.043 RG −0.020 · Diff −0.003
Motiv Primal Ghost Bowling Ball5Motiv Impulse V2 CorePictured: Motiv Primal Ghost
 Motiv Symmetric 2.550 0.050 RG −0.020 · Diff +0.004
900 Global Portal Bowling Ball6900 Global Conduit A.I. CorePictured: 900 Global Portal
 900 Global Asymmetric 2.590 0.050 RG +0.020 · Diff +0.004

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

Inverted Fe2 technology boasts a higher RG and differential like most other balls in the Thunder Line, but with one very important benefit: it lacks the core material that most other balls have. This enables the ball to have a much thicker shell which raises the coefficient of restitution. A higher energy transfer to the pins with less deflection upon impact is what can be expected with this design.

From Storm’s description

Questions bowlers ask

What is the RG of the Storm Inverted Fe2 Core?

At 15 lb the Storm Inverted Fe2 Core has an RG of 2.570. It ranges from 2.520 to 2.650 across the listed weights.

What is the 14 lb RG of the Storm Inverted Fe2 Core?

At 14 lb the RG is 2.580.

What is the differential of the Storm Inverted Fe2 Core?

At 15 lb the differential is 0.046. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the Storm Inverted Fe2 Core?

Storm Hy-Road Bowling Ball, Storm Hy-Road X-Comp Bowling Ball, Storm Hy-Road 40 Bowling Ball, Storm HyRoad Solid Bowling Ball, Storm HyRoad Nano Bowling Ball. 1 are in stock now.

How do the Storm Inverted Fe2 Core specs change by weight?

At 16 lb: RG 2.520, differential 0.058. At 12 lb: RG 2.650, differential 0.035.

How does the Storm Inverted Fe2 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 Inverted Fe2 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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