Bowling ball core · Storm

Storm Velocity Core

The core inside the Storm Phaze line

A symmetric core with early rev-up and medium flare, built for medium to heavy oil. 2 of the 16 balls with this core are in stock at BowlersMart.

  • Symmetric
  • RG 2.480
  • Diff 0.051
Storm Velocity symmetric core shape inside the ball

Specs

RG AT 15 LB

2.480

Early rev-up

Revs soonerRevs later

16% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.051

Medium flare

Less flareMore flare

65% 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 Velocity Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.480 0.051 None
15 lbUsed on this page 2.480 0.051 None
14 lb 2.530 0.050 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 Velocity 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.

2 balls on this core list different numbers
  • Storm Crucial Phaze Overseas Bowling Ball: RG 2.540, diff 0.041, mass bias Not listed at 15 lb
  • Storm Ultimate Phaze Overseas Bowling Ball: RG 2.540, diff 0.041, mass bias Not listed at 15 lb

Balls with the Storm Velocity Core

2 of the 16 balls with the Storm Velocity Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Solid covers

Solid covers grip the lane soonest and suit heavier oil.

Storm Phaze 2 Bowling Ball

Storm Phaze 2

Storm TX-16 Solid Reactive

Medium to heavy oil

Sale price $164.95 Regular price $249.95In stock

Pearl covers

Pearl covers go longer and turn harder at the end, best on medium oil.

Storm Phaze 2 Pearl Bowling Ball

Storm Phaze 2 Pearl

Storm TX-25 Pearl Reactive

Medium to heavy oil

Sale price $184.95 Regular price $249.95In stock
Show 14 balls no longer available at BowlersMart
More bowling balls with the Storm Velocity Core
Ball Cover First seen
Storm Phaze 2 Pearl Pro Pin Bowling Ball Storm TX-25 Pearl Reactive June 2026
Storm Phaze Ruby Overseas Bowling Ball Storm NRG Pro Pearl Reactive October 2022
Storm Phaze V Bowling Ball Storm R2S Pearl Reactive September 2022
Storm Phaze 2 X-Comp Bowling Ball Storm TX-16 Solid Reactive June 2026
Storm Phaze Bowling Ball Storm AX-16 Pearl Reactive December 2015
Storm Phaze 3 Bowling Ball Storm R3S Hybrid Reactive October 2019
Storm Phaze Zero Overseas Bowling Ball Storm GI-17 Solid Reactive January 2021
Storm Phaze 3 SE Overseas Bowling Ball Storm NRG Solid Reactive August 2019
Storm Warp Phaze Overseas Bowling Ball Storm R4S Pearl Reactive January 2020
Storm Phaze Flow Overseas Bowling Ball Storm GI-18 Solid Reactive September 2020
Storm Phaze 4 Bowling Ball Storm R2S Pearl Reactive January 2022
Storm Crucial Phaze Overseas Bowling Ball Storm R3S Pearl Reactive March 2021
Storm Phaze EX Overseas Bowling Ball Storm NRG-2 Pearl Reactive June 2023
Storm Ultimate Phaze Overseas Bowling Ball Storm TX-16 Solid Reactive June 2022

Shop the 2 available balls with this core

Where the Storm Velocity 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 0.053Storm 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 0.054DV8 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 0.051Hammer 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 0.052Motiv 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 0.047Motiv 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 0.054Storm 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 0.056Hammer Modified Infamous Core, RG 2.560, diff 0.049Hammer Hazmat Core, RG 2.470, diff 0.055Track Criterion MD Core, RG 2.500, diff 0.052Storm Ignition Core, RG 2.490, diff 0.052Brunswick 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 0.053Radical No Doubt Symmetric Core (pictured: Radical No Doubt Hybrid Bowling Ball)1Roto Grip Rocker AI Core (pictured: Roto Grip Rockstar Amped Bowling Ball)2900 Global Ellipse Asymmetric A.I. Core (pictured: 900 Global Origin EX Bowling Ball)3Motiv Overload (pictured: Motiv Evoke Hysteria Bowling Ball)4Brunswick Ethos Core (pictured: Brunswick Ethos Solid Bowling Ball)5Roto Grip Momentous A.I. Core (pictured: Roto Grip Attention Star S2 Bowling Ball)6Storm Velocity Core (pictured: Storm Phaze 2 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 Velocity A.I. Core

This core 1 Nearest cores Other cores

Nearest cores to the Storm Velocity Core
Core Brand Shape RG Diff vs this core
Radical No Doubt Hybrid Bowling Ball1Radical No Doubt Symmetric CorePictured: Radical No Doubt Hybrid
 Radical Symmetric 2.480 0.051 Same RG and differential
Roto Grip Rockstar Amped Bowling Ball2Roto Grip Rocker AI CorePictured: Roto Grip Rockstar Amped
 Roto Grip Symmetric 2.480 0.050 RG 0.000 · Diff −0.001
900 Global Origin EX Bowling Ball3900 Global Ellipse Asymmetric A.I. CorePictured: 900 Global Origin EX
 900 Global Asymmetric 2.480 0.050 RG 0.000 · Diff −0.001
Motiv Evoke Hysteria Bowling Ball4Motiv OverloadPictured: Motiv Evoke Hysteria
 Motiv Asymmetric 2.480 0.050 RG 0.000 · Diff −0.001
Brunswick Ethos Solid Bowling Ball5Brunswick Ethos CorePictured: Brunswick Ethos Solid
 Brunswick Symmetric 2.480 0.053 RG 0.000 · Diff +0.002
Roto Grip Attention Star S2 Bowling Ball6Roto Grip Momentous A.I. CorePictured: Roto Grip Attention Star S2
 Roto Grip Asymmetric 2.480 0.049 RG 0.000 · Diff −0.002

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

This fast-revving shape, the aptly named, supercharged Velocity core smooths out the backend reaction without over-reacting and avoids creating an undesirable last-second movement. The nature of the core gives it plenty of motion due to the higher differential, but with the forgiveness all players love to see.

From Storm’s description

Questions bowlers ask

What is the RG of the Storm Velocity Core?

At 15 lb the Storm Velocity Core has an RG of 2.480. It ranges from 2.480 to 2.650 across the listed weights.

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

At 14 lb the RG is 2.530.

What is the differential of the Storm Velocity Core?

At 15 lb the differential is 0.051. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the Storm Velocity Core?

Storm Phaze 2 Pearl Bowling Ball, Storm Phaze 2 Bowling Ball, Storm Phaze 2 Pearl Pro Pin Bowling Ball, Storm Phaze Ruby Overseas Bowling Ball, Storm Phaze V Bowling Ball. 2 are in stock now.

How do the Storm Velocity Core specs change by weight?

At 16 lb: RG 2.480, differential 0.051. At 12 lb: RG 2.650, differential 0.035.

How does the Storm Velocity 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 Velocity 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

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