Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Hammer Black Widow - Pink
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Radical Guru Oracle Pearl
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Roto Grip Gremlin
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Storm Identity B/C/P
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|
|---|---|---|---|---|
| Brand | Hammer | Radical | Roto Grip | Storm |
| Line | — | Top Shelf | HP3 | Premier |
| Coverstock | Aggression Pearl CFI | HK22C+ Pearl | V-R1 Pearl | REX Pearl |
| Cover type | Pearl reactive | Pearl reactive | Pearl reactive | Pearl reactive |
| Core | Gas Mask | Guru Asymmetric | Rondure MaxD | ID AI |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.500 | 2.503 | 2.500 (16 lb) | 2.500 (16 lb) |
| Diff | 0.058 | 0.044 | 0.056 (16 lb) | 0.055 (16 lb) |
| Int. diff | — | — | 0.008 | 0.009 |
| Factory finish | 500/1000 Abralon Polished w/ Powerhouse Factory Finish Polish | 500, 1000, 1500 Siaair / Factory Compound | Power Edge | Power Edge |
| Lane condition | Medium oil – Heavy oil | — | — | — |
| Flare potential | — | — | High | High |
| Reaction | Length with Aggressive Backend | — | — | — |
| Color | Pink Pearl | Black / Gold | Plum / Raisen / Tanzanite | Black / Cherry / Purple |
| Release date | — | June 11, 2026 | July 18, 2025 | July 1, 2025 |
| Status | Retired | Current | Current | Current |
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