Bowling ball core · Roto Grip

Roto Grip Ikon Core

The core inside the Roto Grip Idol line

A symmetric core with early rev-up and high flare, built for medium oil. Balls with this core are no longer available at BowlersMart.

  • Symmetric
  • RG 2.490
  • Diff 0.052
Roto Grip Ikon symmetric core shape inside the ball

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Specs

RG AT 15 LB

2.490

Early rev-up

Revs soonerRevs later

30% 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

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.
Roto Grip Ikon Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.490 0.049 None
15 lbUsed on this page 2.490 0.052 None
14 lb 2.540 0.049 None
13 lb 2.590 0.045 None
12 lb 2.650 0.035 None

Source: Roto Grip published specs, as shown on BowlersMart’s original Roto Grip Ikon 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 Idol?

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

SWAG Judge Bowling Ball

SWAG Judge

SWAG Witness Reactive

Medium to heavy oil

Sale price $184.95 Regular price $289.95In stock
Radical Outer Limits Black Hole Bowling Ball

Radical Outer Limits Black Hole

Radical HK22C Solid Reactive

Heavy oil

Sale price $159.95 Regular price $259.95In stock
Radical No Doubt Hybrid Bowling Ball

Radical No Doubt Hybrid

Radical Advantage Plus Hybrid Reactive

Heavy oil, medium oil

Sale price $174.95 Regular price $259.95In stock
SWAG Black Dragon Hybrid Bowling Ball

SWAG Black Dragon Hybrid

SWAG Scorch Hybrid AP26

Heavy oil, medium to heavy oil

Sale price $159.95 Regular price $259.95In stock
Radical Deep Impact Bowling Ball

Radical Deep Impact

HK22C+ Hybrid Reactive

Heavy oil

Sale price $169.95 Regular price $259.95In 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 Roto Grip Ikon Core

None of the 16 balls with the Roto Grip Ikon Core are in stock at BowlersMart right now.

Show 16 balls no longer available at BowlersMart
More bowling balls with the Roto Grip Ikon Core
Ball Cover First seen
Roto Grip Idol MPW Overseas Bowling Ball Roto Grip XtremeTrax Solid Reactive May 2024
Roto Grip Idol Mega Pink Overseas Bowling Ball Roto Grip eTrax Solid Reactive September 2023
Roto Grip Idol Bowling Ball Roto Grip MicroTrax-S18 Solid Reactive February 2018
Roto Grip Idol Pearl Bowling Ball Roto Grip eTrax-P18 Pearl Reactive October 2018
Roto Grip Idol Pro Bowling Ball Roto Grip eTrax-S19 Solid Reactive July 2019
Roto Grip Idol Red Overseas Bowling Ball Roto Grip MicroTrax Solid Reactive July 2020
Roto Grip Idol Synergy Bowling Ball Roto Grip eTrax-H19 Hybrid Reactive October 2020
Roto Grip Idol Black Pearl Overseas Bowling Ball Roto Grip eTrax-P20 Pearl Reactive October 2019
Roto Grip Idol Lime Green Overseas Bowling Ball Roto Grip MicroTrax-S18 Solid Reactive December 2020
Roto Grip Idol Purple Overseas Bowling Ball Roto Grip MicroTrax-S18 Solid Reactive May 2022
Roto Grip Idol Splash Overseas Bowling Ball Roto Grip eTrax Pearl Reactive March 2022
Roto Grip Idol Helios Bowling Ball Roto Grip XtremeTrax Solid Reactive October 2021
Roto Grip Idol Ultra Black Overseas Bowling Ball Roto Grip MicroTrax-S20 Solid Reactive June 2023
Roto Grip Idol Cosmos Bowling Ball Roto Grip XtremeTrax Pearl Reactive June 2022
Roto Grip Idol Gold Pearl Bowling Ball Roto Grip eTrax Pearl Reactive November 2022
Roto Grip Optimum Idol Bowling Ball Roto Grip MicroTrax Solid Reactive February 2024

Where the Roto Grip Ikon 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 0.047Ebonite 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 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 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 0.053Storm 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 A.I. Core, RG 2.470, diff 0.055900 Global Strobe A.I. 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 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 0.045Storm 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 0.048Motiv Overload Core, RG 2.480, diff 0.050DV8 Duality Core, RG 2.480, diff 0.036Hammer Spheroid Core, RG 2.480, diff 0.048Motiv 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 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 0.048Ebonite Entity Core, RG 2.515, diff 0.052Roto 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 0.042900 Global Magna A.I. Core, RG 2.490, diff 0.044KR Strikeforce Launch Core, RG 2.530, diff 0.047Motiv Halogen Core, RG 2.550, diff 0.037Motiv Gear APG Core, RG 2.470, diff 0.036Radical Snapshot Symmetric Core, RG 2.523, diff 0.050Hammer 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 0.022SWAG Judge Core (pictured: SWAG Judge Bowling Ball)1Radical No Doubt Symmetric Core (pictured: Radical No Doubt Hybrid Bowling Ball)2SWAG Dragon Asymmetric Core (pictured: SWAG Black Dragon Bowling Ball)3Radical Outer Limits Asymmetric Core (pictured: Radical Outer Limits Black Hole Bowling Ball)4Radical Torpedo Asymmetric Core (pictured: Radical Torpedo Direct Hit Bowling Ball)5Storm Velocity Core (pictured: Storm Phaze 2 Bowling Ball)6Roto Grip Ikon Core (pictured: Roto Grip Idol MPW 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.

Same family: Roto Grip Ikon A.I. Core

This core 1 Nearest cores Other cores

Nearest cores to the Roto Grip Ikon Core
Core Brand Shape RG Diff vs this core
SWAG Judge Bowling Ball1SWAG Judge CorePictured: SWAG Judge
 SWAG Asymmetric 2.490 0.052 Same RG and differential
Radical No Doubt Hybrid Bowling Ball2Radical No Doubt Symmetric CorePictured: Radical No Doubt Hybrid
 Radical Symmetric 2.485 0.051 RG −0.005 · Diff −0.001
SWAG Black Dragon Bowling Ball3SWAG Dragon Asymmetric CorePictured: SWAG Black Dragon
 SWAG Asymmetric 2.490 0.050 RG 0.000 · Diff −0.002
Radical Outer Limits Black Hole Bowling Ball4Radical Outer Limits Asymmetric CorePictured: Radical Outer Limits Black Hole
 Radical Asymmetric 2.499 0.051 RG +0.009 · Diff −0.001
Radical Torpedo Direct Hit Bowling Ball5Radical Torpedo Asymmetric CorePictured: Radical Torpedo Direct Hit
 Radical Asymmetric 2.480 0.052 RG −0.010 · Diff 0.000
Storm Phaze 2 Bowling Ball6Storm Velocity CorePictured: Storm Phaze 2
 Storm Symmetric 2.480 0.051 RG −0.010 · Diff −0.001

Matches use 15 lb RG and differential.

Drilling and tools

Drilling layoutsLayout guides for symmetric and asymmetric ballsLayout studioDraw a layout on the ball and convert it between Dual Angle, Pin Buffer, 2LS and PAL

Because you can never have too much of a good thing, the Ikon Core has changed the way everyone looks at the HP3 line. The low RG symmetrical shape with high differential not only provides plenty of flare throughout the lane, it also provides superb motion down lane and through the pins. Originally introduced in the IDOL back in March of 2018, the Ikon Core has become a fan favorite and staple in the arsenals of all the top professionals around the globe. This low RG, high differential symmetrical core revs up in the midlane while providing outstanding continuation down lane which allows it to be used by all styles of players from any angle on the lane.

From Roto Grip’s description

Questions bowlers ask

What is the RG of the Roto Grip Ikon Core?

At 15 lb the Roto Grip Ikon Core has an RG of 2.490. It ranges from 2.490 to 2.650 across the listed weights.

What is the 14 lb RG of the Roto Grip Ikon Core?

At 14 lb the RG is 2.540.

What is the differential of the Roto Grip Ikon Core?

At 15 lb the differential is 0.052. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the Roto Grip Ikon Core?

Roto Grip Idol MPW Overseas Bowling Ball, Roto Grip Idol Mega Pink Overseas Bowling Ball, Roto Grip Idol Bowling Ball, Roto Grip Idol Pearl Bowling Ball, Roto Grip Idol Pro Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Roto Grip Ikon Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include SWAG Judge Bowling Ball, Radical Outer Limits Black Hole Bowling Ball, Radical No Doubt Hybrid Bowling Ball, SWAG Black Dragon Hybrid Bowling Ball, Radical Deep Impact Bowling Ball, Brunswick Combat Solid Bowling Ball.

How do the Roto Grip Ikon 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 Roto Grip Ikon 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. Roto Grip published specs, as shown on BowlersMart’s original Roto Grip Ikon core page (2022), as published by the manufacturer.

Baseline. The baseline is 203 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 2026-11-03.

Next lesson

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