Bowling ball core · Brunswick

Brunswick QCS-18 Core

Asymmetric Brunswick core

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

  • Asymmetric
  • RG 2.510
  • Diff 0.052
  • MB 0.018
Brunswick QCS-18 symmetric core shape inside the ball

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Specs

RG AT 15 LB

2.510

Mid-lane rev-up

Revs soonerRevs later

53% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.052

High flare

Less flareMore flare

75% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.018

Medium asymmetry

MilderStronger

67% 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.
Brunswick QCS-18 Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.519 0.045 0.016
15 lbUsed on this page 2.510 0.052 0.018
14 lb 2.526 0.051 0.018
13 lb 2.597 0.041 0.014
12 lb 2.593 0.041 0.014

Source: Brunswick published specs, as shown on BowlersMart’s original Brunswick QCS-18 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 Brunswick QCS-18?

Balls with the Brunswick QCS-18 Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

900 Global Viking Conquest Bowling Ball

900 Global Viking Conquest

900 Global RB 94 Solid Reactive

Medium to heavy oil

Sale price $209.95 Regular price $299.95In stock
Ebonite Entity Pearl Bowling Ball

Ebonite Entity Pearl

Ebonite Optimize Pearl Reactive

Medium to heavy oil

Sale price $129.95 Regular price $279.99In stock
Roto Grip Transform Pearl Bowling Ball

Roto Grip Transform Pearl

Roto Grip MicroTrax Pearl Reactive

Medium to heavy oil, medium oil

Sale price $209.95 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
Hammer Fallout Bowling Ball

Hammer Fallout

Hammer HK22 C2 Solid Reactive

Medium to heavy oil

Sale price $169.95 Regular price $269.95In stock
Brunswick Combat Solid Bowling Ball

Brunswick Combat Solid

Brunswick Alpha Premier Solid HK22C2 Reactive

Medium to heavy oil

Sale price $194.95 Regular price $289.95In stock

Balls with the Brunswick QCS-18 Core

None of the 1 balls with the Brunswick QCS-18 Core are in stock at BowlersMart right now.

Show 1 ball no longer available at BowlersMart
More bowling balls with the Brunswick QCS-18 Core
Ball Cover First seen
Brunswick Quantum Evo Hybrid Bowling Ball Brunswick Evolution Hybrid Reactive June 2022

Where the Brunswick QCS-18 sits

Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.

Storm Element Tour A.I. Core, RG 2.470, diff 0.035DV8 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 0.050Roto 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 0.050SWAG 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 2.478, 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 0.055Radical 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 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 2.480, 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 0.048Radical Outer Limits Asymmetric Core, RG 2.499, 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 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 0.048Roto 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 0.022900 Global Strobe A.I. Core (pictured: 900 Global Viking Bowling Ball)1Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)2Ebonite Entity Core (pictured: Ebonite Entity Pearl Bowling Ball)3DV8 Unholy Core (pictured: DV8 Heckler Hybrid Bowling Ball)4Brunswick Rampart Core (pictured: Brunswick Combat Solid Bowling Ball)5Ebonite Big Time Core (pictured: Ebonite Go Time Bowling Ball)6Brunswick QCS-18 Core (pictured: Brunswick Quantum Evo Hybrid 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: Brunswick QCS-24 Core Same family: Brunswick QCS-12 Core

This core 1 Nearest cores Other cores

Nearest cores to the Brunswick QCS-18 Core
Core Brand Shape RG Diff vs this core
900 Global Viking Bowling Ball1900 Global Strobe A.I. CorePictured: 900 Global Viking
 900 Global Asymmetric 2.510 0.052 Same RG and differential
Roto Grip Transformer Bowling Ball2Roto Grip Morph-Wing CorePictured: Roto Grip Transformer
 Roto Grip Asymmetric 2.510 0.051 RG 0.000 · Diff −0.001
Ebonite Entity Pearl Bowling Ball3Ebonite Entity CorePictured: Ebonite Entity Pearl
 Ebonite Asymmetric 2.515 0.052 RG +0.005 · Diff 0.000
DV8 Heckler Hybrid Bowling Ball4DV8 Unholy CorePictured: DV8 Heckler Hybrid
 DV8 Asymmetric 2.504 0.051 RG −0.006 · Diff −0.001
Brunswick Combat Solid Bowling Ball5Brunswick Rampart CorePictured: Brunswick Combat Solid
 Brunswick Asymmetric 2.502 0.051 RG −0.008 · Diff −0.001
Ebonite Go Time Bowling Ball6Ebonite Big Time CorePictured: Ebonite Go Time
 Ebonite Symmetric 2.508 0.054 RG −0.002 · Diff +0.002

Matches use 15 lb RG and differential.

Drilling and tools

Brunswick drill sheetsLayout guides for symmetric and asymmetric ballsDual angle converterTurn a pin to PAP layout into a dual angle layout

The Quantum Evo series celebrates the evolution of technology within one of bowling’s most significant series of balls, the Quantum.  The keystone for the Quantum balls from the onset has been the mushroom-shaped core, and this is where our engineers started developing this next evolution in Quantum balls. The QCS (Quantum Core System) begins with a modified mushroom shape with integrated flow-through channels allowing DynamiCore2 to flow freely through the core body, promoting better adhesion, durability, and hitting power. Quantum balls have traditionally been a thick shell, which is great for hitting and durability but limits RG core numbers. The evolution of the QCS and DynamiCore2 allows for a ball with the same hitting power and durability of a thick shell ball but the core dynamic opportunities of a two-plus piece core construction. This evolution will create faster revving, more versatile Quantum bowling balls. THE EVOLUTION OF CORE DESIGNWe started with the same mushroom core shape, and our engineers carefully modified the sides of the top portion, taking mass away until the asymmetry displayed the unique numbers we looked to achieve. The result is a system of cores designed to precisely exhibit reaction characteristics that perfectly align with the cover strength.  DynamiCore has been an evolutionary technology for Brunswick since 2018, and our theme of evolving continues with the new DynamiCore2. We chose to unveil this next stage in outer core technology with the

From Brunswick’s description

Questions bowlers ask

What is the RG of the Brunswick QCS-18 Core?

At 15 lb the Brunswick QCS-18 Core has an RG of 2.510. It ranges from 2.510 to 2.597 across the listed weights.

What is the 14 lb RG of the Brunswick QCS-18 Core?

At 14 lb the RG is 2.526.

What is the differential of the Brunswick QCS-18 Core?

At 15 lb the differential is 0.052. The mass bias is 0.018.

Which bowling balls use the Brunswick QCS-18 Core?

Brunswick Quantum Evo Hybrid Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Brunswick QCS-18 Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include 900 Global Viking Conquest Bowling Ball, Ebonite Entity Pearl Bowling Ball, Roto Grip Transform Pearl Bowling Ball, Ebonite Go Time Bowling Ball, Hammer Fallout Bowling Ball, Brunswick Combat Solid Bowling Ball.

How do the Brunswick QCS-18 Core specs change by weight?

At 16 lb: RG 2.519, differential 0.045, mass bias 0.016. At 12 lb: RG 2.593, differential 0.041, mass bias 0.014.

How does the Brunswick QCS-18 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. Brunswick published specs, as shown on BowlersMart’s original Brunswick QCS-18 core page (2022), 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 2026-10-17.

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