Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Roto Grip Perfect Gem
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Track Paragon Fire
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Storm Alpha Crux
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Hammer Black Widow 3.0 Dynasty
|
|
|---|---|---|---|---|
| Brand | Roto Grip | Track | Storm | Hammer |
| Line | HP4 | High | Premier | Upper Mid |
| Coverstock | ER1 Solid | Prime Response Solid (HK22C²) | GI26 Solid | HK22 - Cohesion Solid |
| Cover type | Solid reactive | Solid reactive | Solid reactive | Solid reactive |
| Core | Gem AI | I-Core 3.0 | Catalyst AI | Gas Mask |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.490 (16 lb) | 2.486 | 2.480 (16 lb) | 2.500 |
| Diff | 0.055 (16 lb) | 0.056 | 0.052 (16 lb) | 0.058 |
| Int. diff | 0.017 | 0.015 | 0.017 | 0.016 |
| Factory finish | 2000 Grit | 500, 2000 Siaair Micro Pad | 2000 Grit | 500, 1000, 2000 Siaair Micro Pad |
| Lane condition | — | Medium oil – Heavy oil | — | Medium oil – Heavy oil |
| Flare potential | High | — | High | — |
| Reaction | — | Length with strong backend | — | Aggressive mid-lane and backend |
| Color | Pink / Rose / Onyx | Red / Scarlet / Crimson | Black / Turquoise / Violet | Ultraviolet / Black |
| Release date | October 2, 2026 | June 11, 2026 | May 29, 2026 | January 15, 2026 |
| Status | Current | Current | Current | Current |
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