Bowling ball core · 900 Global

900 Global Reflector Symmetric Core

The core inside the 900 Global Vintage line

A symmetric core with mid-lane rev-up and medium flare, built for dry to medium oil. Balls with this core are no longer available at BowlersMart.

  • Symmetric
  • RG 2.510
  • Diff 0.048
900 Global Reflector symmetric core shape inside the ball

Specs

RG AT 15 LB

2.510

Mid-lane rev-up

Revs soonerRevs later

54% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.048

Medium flare

Less flareMore flare

52% 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.
900 Global Reflector Symmetric Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.490 0.049 None
15 lbUsed on this page 2.510 0.048 None
14 lb 2.550 0.045 None
13 lb 2.590 0.045 None
12 lb 2.650 0.035 None

Source: 900 Global published specs, as shown on BowlersMart’s original 900 Global Reflector Symmetric 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 Vintage?

Balls with the 900 Global Reflector Symmetric Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

SWAG Unknown Solid Bowling Ball

SWAG Unknown Solid

SWAG Mystery Solid AP26

Medium to heavy oil, medium oil

Sale price $149.95 Regular price $249.95In stock
SWAG Serpent Hybrid Bowling Ball

SWAG Serpent Hybrid

SWAG Serum AP26 Hybrid Reactive

Medium to heavy fresh oil

Sale price $159.95 Regular price $259.95In stock
SWAG Unreal Solid Bowling Ball

SWAG Unreal Solid

SWAG Never Quit AP26 Solid Reactive

Medium to heavy fresh oil

Sale price $149.95 Regular price $249.95In stock
Brunswick Strategy Logic Bowling Ball

Brunswick Strategy Logic

Brunswick HK22C2 EVO Hybrid Reactive

Medium to heavy oil

Sale price $194.95 Regular price $289.95In stock
Brunswick Danger Zone Bowling Ball

Brunswick Danger Zone

Brunswick HK22 PowerKoil 26 Reactive

Medium to heavy oil

Sale price $119.95 Regular price $199.95In 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

Balls with the 900 Global Reflector Symmetric Core

None of the 4 balls with the 900 Global Reflector Symmetric Core are in stock at BowlersMart right now.

Show 4 balls no longer available at BowlersMart
More bowling balls with the 900 Global Reflector Symmetric Core
Ball Cover First seen
900 Global Aspect Bowling Ball 900 Global S77 Response Solid Reactive June 2020
900 Global Vintage Dark Fuchsia Overseas Bowling Ball S26 Solid Urethane June 2022
900 Global Vintage Overseas Bowling Ball S26 Solid Urethane June 2023
900 Global Vintage Obsidian Overseas Bowling Ball S26 Solid Urethane June 2022

Where the 900 Global Reflector Symmetric 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 0.032Ebonite Big Time Core, RG 2.508, 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 2.469, 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, RG 2.466, 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 Core, RG 2.540, diff 0.036SWAG 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 0.037Brunswick Rampart Core, RG 2.502, diff 0.051DV8 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 AI Core, RG 2.470, diff 0.055900 Global Strobe AI Core, RG 2.510, diff 0.052Radical Guru Core, RG 2.503, diff 0.044Track I-CORE 3.0, RG 2.486, diff 0.056DV8 Unholy Core, RG 2.504, 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 2.480, 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 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 Craze Core, RG 2.520, diff 0.030Radical Torpedo Asymmetric Core, RG 2.480, diff 0.052Motiv 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 2.499, diff 0.051Motiv Apex Predator Core, RG 2.520, diff 0.055Storm 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 2.496, diff 0.047Brunswick Zone Asymmetric Core, RG 2.478, diff 0.048Ebonite Entity Core, RG 2.515, diff 0.052Roto Grip Rocker AI Core, RG 2.480, diff 0.050Motiv Flux Core, RG 2.570, diff 0.015DV8 Mantra Core, RG 2.498, 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 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 2.468, diff 0.045Storm Element Tour A.I. Core, RG 2.470, diff 0.035KR 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 + AI Core, RG 2.480, diff 0.031Motiv Gear APG, 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 0.022Storm 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 2.478, diff 0.050Columbia 300 Ricochet Core, RG 2.488, 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 0.027Columbia 300 Movement Core, RG 2.513, diff 0.053SWAG Watcher Symmetric Core (pictured: SWAG Unknown Solid Bowling Ball)1SWAG Unreal Core (pictured: SWAG Unreal Bowling Ball)2SWAG Serpent Asymmetric Core (pictured: SWAG Serpent Hybrid Bowling Ball)3Brunswick Dual Centric Core (pictured: Brunswick Strategy Logic Bowling Ball)4Brunswick Danger Zone Core (pictured: Brunswick Danger Zone Bowling Ball)5Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)6900 Global Reflector Symmetric Core (pictured: 900 Global Vintage 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 900 Global Reflector Symmetric Core
Core Brand Shape RG Diff vs this core
SWAG Unknown Solid Bowling Ball1SWAG Watcher Symmetric CorePictured: SWAG Unknown Solid
 SWAG Symmetric 2.510 0.048 Same RG and differential
SWAG Unreal Bowling Ball2SWAG Unreal CorePictured: SWAG Unreal
 SWAG Symmetric 2.510 0.047 RG 0.000 · Diff −0.001
SWAG Serpent Hybrid Bowling Ball3SWAG Serpent Asymmetric CorePictured: SWAG Serpent Hybrid
 SWAG Asymmetric 2.510 0.048 Same RG and differential
Brunswick Strategy Logic Bowling Ball4Brunswick Dual Centric CorePictured: Brunswick Strategy Logic
 Brunswick Asymmetric 2.509 0.047 RG −0.001 · Diff −0.001
Brunswick Danger Zone Bowling Ball5Brunswick Danger Zone CorePictured: Brunswick Danger Zone
 Brunswick Symmetric 2.501 0.048 RG −0.009 · Diff 0.000
Roto Grip Transformer Bowling Ball6Roto Grip Morph-Wing CorePictured: Roto Grip Transformer
 Roto Grip Asymmetric 2.510 0.051 RG 0.000 · Diff +0.003

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

Turn on JavaScript to compare with your ball.Balls with the 900 Global Reflector Symmetric CoreNone of the 4 balls with the 900 Global Reflector Symmetric Core are in stock at BowlersMart right now.Show 4 balls no longer available at BowlersMartMore bowling balls with the 900 Global Reflector Symmetric CoreBallCoverFirst seen900 Global Aspect Bowling Ball900 Global S77 Response Solid ReactiveJune 2020900 Global Vintage Dark Fuchsia Overseas Bowling BallS26 Solid UrethaneJune 2022900 Global Vintage Overseas Bowling BallS26 Solid UrethaneJune 2023900 Global Vintage Obsidian Overseas Bowling BallS26 Solid UrethaneJune 2022Where the 900 Global Reflector Symmetric sitsEach dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.All coresSymmetricAsymmetric900 Global onlyAny brand900 GlobalBrunswickColumbia 300DV8EboniteEpicHammerKR StrikeforceMotivRadicalRoto GripSWAGStormTrack+−ResetZoom to this coreDV8 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 0.032Ebonite 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. C

From 900 Global’s description

Questions bowlers ask

What is the RG of the 900 Global Reflector Symmetric Core?

At 15 lb the 900 Global Reflector Symmetric Core has an RG of 2.510. It ranges from 2.490 to 2.650 across the listed weights.

What is the 14 lb RG of the 900 Global Reflector Symmetric Core?

At 14 lb the RG is 2.550.

What is the differential of the 900 Global Reflector Symmetric Core?

At 15 lb the differential is 0.048. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the 900 Global Reflector Symmetric Core?

900 Global Aspect Bowling Ball, 900 Global Vintage Dark Fuchsia Overseas Bowling Ball, 900 Global Vintage Overseas Bowling Ball, 900 Global Vintage Obsidian Overseas Bowling Ball. 0 are in stock now.

Can I still buy a ball with the 900 Global Reflector Symmetric Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include SWAG Unknown Solid Bowling Ball, SWAG Serpent Hybrid Bowling Ball, SWAG Unreal Solid Bowling Ball, Brunswick Strategy Logic Bowling Ball, Brunswick Danger Zone Bowling Ball, Roto Grip Transform Pearl Bowling Ball.

How do the 900 Global Reflector Symmetric Core specs change by weight?

At 16 lb: RG 2.490, differential 0.049. At 12 lb: RG 2.650, differential 0.035.

How does the 900 Global Reflector Symmetric 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. 900 Global published specs, as shown on BowlersMart’s original 900 Global Reflector Symmetric 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 carry900 Global core libraryEvery 900 Global core we have specs for