Bowling ball cores · Roto Grip

Roto Grip Bowling Ball Cores

Every Roto Grip core in a ball we sell, with its RG, differential and mass bias, on one map

Roto Grip puts 8 different cores into the 15 Roto Grip balls we have in stock today: 3 symmetric and 5 asymmetric. The newest is the Roto Grip GEM A.I. Core. The strongest flare comes from the Roto Grip Rondure MaxD Core (differential 0.058), and the earliest-revving is the Roto Grip Rocker A.I. Core (RG 2.480). Every core below links to its own page with specs by weight and the balls built on it.

Not sure? Take the Ball FinderUpdated October 16, 2026

  • 8 cores in stock
  • 3 symmetric, 5 asymmetric
  • 15 balls in stock
  • 38 cores out of stock

The Roto Grip core map

Where Roto Grip’s cores sit on RG and differential against every other core we stock. Lower and left revs early with less flare; up and right saves energy and flares more.

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 0.032Brunswick 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 0.055Storm Element Tour A.I. Core, RG 2.470, diff 0.035900 Global Conduit A.I. Core, RG 2.590, diff 0.050Hammer 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 0.029Hammer 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 0.024Brunswick Fury Core, RG 2.524, diff 0.038Motiv Sigma Core, RG 2.470, diff 0.047900 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 0.045Columbia 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 0.020SWAG 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 0.048Ebonite Entity Core, RG 2.515, diff 0.052Motiv 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 0.034Motiv 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 0.022Roto Grip Hustle Core (pictured: Roto Grip Hustle M+M Bowling Ball)1Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)2Roto Grip Rondure MaxD Core (pictured: Roto Grip Gremlin Bowling Ball)3Roto Grip RST A.I. Core (pictured: Roto Grip RST Hyperdrive Bowling Ball)4Roto Grip GEM A.I. Core (pictured: Roto Grip Perfect Gem Bowling Ball)5Roto Grip Hyped UP Core (pictured: Roto Grip hyped UP! Bowling Ball)6Roto Grip Rocker A.I. Core (pictured: Roto Grip Rockstar Amped Bowling Ball)7Roto Grip Rondure Tour X Core (pictured: Roto Grip Gremlin Tour X Bowling Ball)82.442.482.522.562.602.642.680.0100.0200.0300.0400.0500.060RG at 15 lbDifferential at 15 lb← Revs up soonerRevs up later →More flare ↑Less flare ↓
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 0.032Brunswick 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 0.055Storm Element Tour A.I. Core, RG 2.470, diff 0.035900 Global Conduit A.I. Core, RG 2.590, diff 0.050Hammer 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 0.029Hammer 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 0.024Brunswick Fury Core, RG 2.524, diff 0.038Motiv Sigma Core, RG 2.470, diff 0.047900 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 0.045Columbia 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 0.020SWAG 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 0.048Ebonite Entity Core, RG 2.515, diff 0.052Motiv 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 0.034Motiv 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 0.022Roto Grip Hustle Core (pictured: Roto Grip Hustle M+M Bowling Ball)1Roto Grip Morph-Wing Core (pictured: Roto Grip Transformer Bowling Ball)2Roto Grip Rondure MaxD Core (pictured: Roto Grip Gremlin Bowling Ball)3Roto Grip RST A.I. Core (pictured: Roto Grip RST Hyperdrive Bowling Ball)4Roto Grip GEM A.I. Core (pictured: Roto Grip Perfect Gem Bowling Ball)5Roto Grip Hyped UP Core (pictured: Roto Grip hyped UP! Bowling Ball)6Roto Grip Rocker A.I. Core (pictured: Roto Grip Rockstar Amped Bowling Ball)7Roto Grip Rondure Tour X Core (pictured: Roto Grip Gremlin Tour X Bowling Ball)82.462.512.562.610.0140.0220.0300.0380.0460.054RG at 15 lbDifferential at 15 lb← Revs up soonerRevs up later →More flare ↑Less flare ↓
Numbered: the Roto Grip cores in stock, pictured by a ball that uses each. Grey dots: every other core in a reactive or urethane ball we stock. Up and right means more flare and later rev-up.

Map key: Roto Grip cores in stock

  1. 1Roto Grip Hustle M+M Bowling BallRoto Grip Hustle CoreSymmetricRG 2.530Diff 0.030
  2. 2Roto Grip Transformer Bowling BallRoto Grip Morph-Wing CoreAsymmetricRG 2.510Diff 0.051
  3. 3Roto Grip Gremlin Bowling BallRoto Grip Rondure MaxD CoreAsymmetricRG 2.500Diff 0.058
  4. 4Roto Grip RST Hyperdrive Bowling BallRoto Grip RST A.I. CoreAsymmetricRG 2.520Diff 0.055
  5. 5Roto Grip Perfect Gem Bowling BallRoto Grip GEM A.I. CoreAsymmetricRG 2.490Diff 0.057
  6. 6Roto Grip hyped UP! Bowling BallRoto Grip Hyped UP CoreSymmetricRG 2.500Diff 0.042
  7. 7Roto Grip Rockstar Amped Bowling BallRoto Grip Rocker A.I. CoreSymmetricRG 2.480Diff 0.050
  8. 8Roto Grip Gremlin Tour X Bowling BallRoto Grip Rondure Tour X CoreAsymmetricRG 2.480Diff 0.034

Roto Grip cores in stock

The 8 cores in Roto Grip balls you can buy today, most balls in stock first.

  1. Roto Grip Hustle M+M Bowling BallRoto Grip Hustle CoreSymmetricRG 2.530Diff 0.0305 in stockNewest: Roto Grip Hustle VP
  2. Roto Grip Transformer Bowling BallRoto Grip Morph-Wing CoreAsymmetricRG 2.510Diff 0.051Mass bias 0.0152 in stockNewest: Roto Grip Transform Pearl
  3. Roto Grip Gremlin Bowling BallRoto Grip Rondure MaxD CoreAsymmetricRG 2.500Diff 0.058Mass bias 0.0102 in stockNewest: Roto Grip Wicked Gremlin
  4. Roto Grip RST Hyperdrive Bowling BallRoto Grip RST A.I. CoreAsymmetricRG 2.520Diff 0.055Mass bias 0.0172 in stockNewest: Roto Grip RST Hyperdrive Pearl
  5. Roto Grip Perfect Gem Bowling BallRoto Grip GEM A.I. CoreAsymmetricRG 2.490Diff 0.057Mass bias 0.0171 in stockNewest: Roto Grip Perfect Gem
  6. Roto Grip hyped UP! Bowling BallRoto Grip Hyped UP CoreSymmetricRG 2.500Diff 0.0421 in stockNewest: Roto Grip hyped UP!
  7. Roto Grip Rockstar Amped Bowling BallRoto Grip Rocker A.I. CoreSymmetricRG 2.480Diff 0.0501 in stockNewest: Roto Grip Rockstar Amped
  8. Roto Grip Gremlin Tour X Bowling BallRoto Grip Rondure Tour X CoreAsymmetricRG 2.480Diff 0.034Mass bias 0.0111 in stockNewest: Roto Grip Gremlin Tour X

Specs are the manufacturer’s 15 lb figures. Click a core for its specs by weight, the balls built on it and the nearest cores from other brands.

Roto Grip cores out of stock

38 Roto Grip cores with no ball in stock right now, newest first.

  1. Roto Grip Defense A.I. CoreAsymmetricRG 2.490Diff 0.053Used in: Roto Grip Exit Red Overseas
  2. Roto Grip Wrecker A.I. CoreSymmetricRG 2.540Diff 0.045Used in: Roto Grip Wild Wrecker, Roto Grip Ultimate Wrecker
  3. Roto Grip Ikon A.I. CoreSymmetricRG 2.470Diff 0.056Used in: Roto Grip Optimum Idol Pearl
  4. Roto Grip Nucleus A.I. CoreAsymmetricRG 2.500Diff 0.056Used in: Roto Grip X-BLEM X-Cell Master Overseas, Roto Grip X-Cell Master Overseas, Roto Grip X-Cell Tour Overseas
  5. Roto Grip Momentous A.I. CoreAsymmetricRG 2.480Diff 0.049Used in: Roto Grip Attention Star S2, Roto Grip Attention Line Overseas, Roto Grip Attention Star
  6. Roto Grip Rondure Tour CoreAsymmetricRG 2.470Diff 0.026Used in: Roto Grip Tour Dynam-X
  7. Roto Grip Cloned ET CoreAsymmetricRG 2.510Diff 0.056Used in: Roto Grip Clone
  8. Roto Grip Rotary CoreSymmetricRG 2.610Diff 0.018Used in: Roto Grip Wild Streak Tour/U Overseas
  9. Roto Grip Mentor CoreSymmetricRG 2.490Diff 0.046Used in: Roto Grip Duo
  10. Roto Grip Torpex CoreSymmetricRG 2.470Diff 0.052Used in: Roto Grip TNT Infused, Roto Grip TNT
  11. Roto Grip Paragon CoreAsymmetricRG 2.490Diff 0.054Used in: Roto Grip Pro Defiant Overseas
  12. Roto Grip CAM CoreAsymmetricRG 2.500Diff 0.055Used in: Roto Grip Throne LTD Overseas
  13. Roto Grip Cardiac CoreSymmetricRG 2.490Diff 0.055Used in: Roto Grip Torch It Overseas
  14. Roto Grip Defiant LRG CoreAsymmetricRG 2.470Diff 0.053Used in: Roto Grip Magic Gem, Roto Grip Exotic Gem, Roto Grip Gem
  15. Roto Grip Hyped CoreSymmetricRG 2.520Diff 0.036Used in: Roto Grip Hyped Hybrid, Roto Grip Hyped Pearl, Roto Grip Hyped Solid
  16. Roto Grip RST CoreAsymmetricRG 2.530Diff 0.053Used in: Roto Grip RST Black, Roto Grip RST X-1, Roto Grip RST X-1 Squad Overseas
  17. Roto Grip Rondure CoreAsymmetricRG 2.490Diff 0.052Used in: Roto Grip Rubicon, Roto Grip Rubicon UC2, Roto Grip Rubicon EX Overseas
  18. Roto Grip E.T. CoreAsymmetricRG 2.520Diff 0.054Used in: Roto Grip UFO, Roto Grip UFO Pearl Overseas, Roto Grip UFO 2 Overseas
  19. Roto Grip Mutated Rotary CoreSymmetricRG 2.600Diff 0.048Used in: Roto Grip Wild Streak
  20. Roto Grip Momentus CoreAsymmetricRG 2.500Diff 0.053Used in: Roto Grip Attention Overseas, Roto Grip Attention T Overseas, Roto Grip Attention S Overseas
  21. Roto Grip Neutron NXT CoreSymmetricRG 2.550Diff 0.040Used in: Roto Grip MVP, Roto Grip MVP Pearl, Roto Grip MVP Attitude
  22. Roto Grip Altered Hot Shot CoreSymmetricRG 2.540Diff 0.054Used in: Roto Grip Winner, Roto Grip Top Winner Overseas
  23. Roto Grip Centrum CoreAsymmetricRG 2.490Diff 0.050Used in: Roto Grip Halo, Roto Grip Halo Pearl, Roto Grip Halo Vision
  24. Roto Grip Ikon CoreSymmetricRG 2.490Diff 0.052Used in: Roto Grip Idol MPW Overseas, Roto Grip Idol Mega Pink Overseas, Roto Grip Idol
  25. Roto Grip Madcap CoreSymmetricRG 2.480Diff 0.041Used in: Roto Grip Dare Devil, Roto Grip Dare Devil Danger
  26. Roto Grip Chaotic CoreAsymmetricRG 2.510Diff 0.053Used in: Roto Grip No Rules, Roto Grip No Rules Pearl, Roto Grip No Rules Exist
  27. Roto Grip Neutron CoreSymmetricRG 2.550Diff 0.042Used in: Roto Grip Wreck It
  28. Roto Grip Triliptic CoreAsymmetricRG 2.490Diff 0.058Used in: Roto Grip Critical
  29. Roto Grip Late Roll 48 CoreSymmetricRG 2.570Diff 0.025Used in: Roto Grip Loco Solid, Roto Grip Loco Pearl
  30. Roto Grip Late Roll 56 CoreSymmetricRG 2.560Diff 0.034Used in: Roto Grip Devour, Roto Grip Hectic
  31. Roto Grip Middle Roll 70 CoreSymmetricRG 2.500Diff 0.043Used in: Roto Grip Haywire
  32. Roto Grip Nucleus CoreAsymmetricRG 2.520Diff 0.056Used in: Roto Grip Hyper Cell Skid, Roto Grip Eternal Cell, Roto Grip Hot Cell
  33. Roto Grip Cage CoreAsymmetricRG 2.520Diff 0.054Used in: Roto Grip Sinister, Roto Grip Menace
  34. Roto Grip Late Roll 69 CoreSymmetricRG 2.580Diff 0.049Used in: Roto Grip Hysteria, Roto Grip Unhinged
  35. Roto Grip Late Roll 51 CoreSymmetricRG 2.550Diff 0.030Used in: Roto Grip Outcry
  36. Roto Grip Late Roll 46 CoreSymmetricRG 2.570Diff 0.022Used in: Roto Grip Scream Pink
  37. Roto Grip Hot Shot CoreSymmetricRG 2.550Diff 0.045Used in: Roto Grip Show Off, Roto Grip All Out Show Off
  38. Roto Grip Caliber CoreSymmetricRG 2.570Diff 0.048Used in: Roto Grip Berserk, Roto Grip Outlaw, Roto Grip Bandit

Out of stock means no ball with this core is in stock at BowlersMart today. Some come back when the ball restocks; others the brand has retired. The core pages stay up because bowlers still search for these balls, and each one points to the closest cores in stock.

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Best-selling Roto Grip balls right now

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Ranked by what BowlersMart customers bought in the last 30 days. Prices and stock are updated nightly.

Roto Grip Perfect Gem Bowling BallRoto Grip Perfect Gem Bowling Ball10$199.95$289.95Roto Grip Hustle VP Bowling BallRoto Grip Hustle VP Bowling Ball23$114.95$229.95CloseoutRoto Grip Rockstar Amped Bowling BallRoto Grip Rockstar Amped Bowling Ball50$104.95$114.95MSRP $249.95Roto Grip Hustle M+M Bowling BallRoto Grip Hustle M+M Bowling Ball101$109.95$199.95Roto Grip Transform Pearl Bowling BallRoto Grip Transform Pearl Bowling Ball19$209.95$289.95Roto Grip Wicked Gremlin Bowling BallRoto Grip Wicked Gremlin Bowling Ball16$174.95$249.95Limited timeRoto Grip Gremlin Bowling BallRoto Grip Gremlin Bowling Ball81$154.95$174.95MSRP $249.95Ends Oct 30Roto Grip Gremlin Tour X Bowling BallRoto Grip Gremlin Tour X Bowling Ball48$159.95$249.95Roto Grip RST Hyperdrive Pearl Bowling BallRoto Grip RST Hyperdrive Pearl Bowling Ball51$169.95$289.95Roto Grip hyped UP! Bowling BallRoto Grip hyped UP! Bowling Ball10$129.95$179.95CloseoutRoto Grip RST Hyperdrive Bowling BallRoto Grip RST Hyperdrive Bowling Ball78$149.95$164.95MSRP $289.95Roto Grip Transformer Bowling BallRoto Grip Transformer Bowling Ball50$167.95$289.95

Questions bowlers ask

What cores does Roto Grip use in its bowling balls?

8 different cores are in the Roto Grip balls we stock today: Hustle Core, Morph-Wing Core, Rondure MaxD Core, RST A.I. Core, GEM A.I. Core, Hyped UP Core, Rocker A.I. Core, Rondure Tour X Core. 3 are symmetric and 5 asymmetric. Each core’s page lists its RG, differential and mass bias by weight.

Which Roto Grip core has the most flare?

The Roto Grip Rondure MaxD Core, with a differential of 0.058 at 15 lb, the highest of the Roto Grip cores in stock. Higher differential means more flare potential and a stronger, more angular motion.

Which Roto Grip core revs up earliest?

The Roto Grip Rocker A.I. Core, with an RG of 2.480 at 15 lb, the lowest of the Roto Grip cores in stock. A low RG core starts revving sooner and reads the midlane earlier.

Are Roto Grip cores symmetric or asymmetric?

Both. Of the 8 Roto Grip cores in stock, 3 are symmetric (one pin marker, a smooth continuous arc) and 5 are asymmetric (pin and PSA markers, a stronger and more angular backend).

What is Roto Grip’s newest core?

The Roto Grip GEM A.I. Core, first sold here in September 2026. It is asymmetric with an RG of 2.490 and a differential of 0.057 at 15 lb.

Next lesson

Roto Grip coverstocksEvery Roto Grip cover compound and the balls that use it.Bowling ball coresRG, differential and mass bias explained, and every brand’s library.Bowling balls by RGAll in-stock balls sorted by RG.

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