Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Roto Grip Transformer
|
Hammer Spawn
|
Brunswick Combat Solid
|
Hammer Black Widow 3.0 Dynasty
|
|
|---|---|---|---|---|
| Brand | Roto Grip | Hammer | Brunswick | Hammer |
| Line | HP5 | High | Pro | Upper Mid |
| Coverstock | VR1 Solid | HK22C² Solid | HK22C² - Alpha Premier Solid | HK22 - Cohesion Solid |
| Cover type | Solid reactive | Solid reactive | Solid reactive | Solid reactive |
| Core | Morph Wing | Gauntlet | Rampart | Gas Mask |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.500 (16 lb) | 2.501 | 2.502 | 2.500 |
| Diff | 0.050 (16 lb) | 0.050 | 0.051 | 0.058 |
| Int. diff | 0.015 | 0.012 | 0.019 | 0.016 |
| Factory finish | 4000 Grit | 500, 1000 Siaair Micro Pad | 500, 1500 Siaair Micro Pad | 500, 1000, 2000 Siaair Micro Pad |
| Lane condition | — | Medium oil – Heavy oil | — | Medium oil – Heavy oil |
| Flare potential | High | — | — | — |
| Reaction | — | Strong overall hook | — | Aggressive mid-lane and backend |
| Color | Indigo / Violet / Slate | Black | Navy / Blue / Slate / Purple | Ultraviolet / Black |
| Release date | January 23, 2026 | May 14, 2026 | August 13, 2026 | January 15, 2026 |
| Status | Current | Current | Current | Current |
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