Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
ProBowl Challenger black / silver pearl
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Storm Concept
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Storm Tropical Surge Gold-Bronze-Medallion
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Hammer NU 2.0
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|---|---|---|---|---|
| Brand | ProBowl | Storm | Storm | Hammer |
| Line | Reactive | Lab | Tropical | Mid |
| Coverstock | Conquering Pearl | ARC Pearl | Reactor Pearl | NU Active |
| Cover type | Pearl reactive | Pearl reactive | Pearl reactive | — |
| Core | Challenger core | Radius | Surge Core | LED |
| Core type | Symmetric | Symmetric | Symmetric | Symmetric |
| RG | 2.590 | 2.590 (16 lb) | 2.580 | 2.586 |
| Diff | 0.018 | 0.019 (16 lb) | 0.024 | 0.027 |
| Int. diff | — | — | — | — |
| Factory finish | 500 grit / Factory compound / Factory Polish | 1000 Grit | Power Edge | 500, 2000 Siaair Micro Pad |
| Lane condition | Medium-light oil | — | — | Light oil – Medium oil |
| Flare potential | — | Low | — | — |
| Reaction | Clean through the heads with a smooth, controlled backend | — | — | Strong arc |
| Color | Black / Silver | Teal / Imperial Blue | Gold / Bronze / Medallion | Matte Grey |
| Release date | — | February 27, 2026 | July 10, 2026 | November 20, 2025 |
| Status | Current | Current | Current | Current |
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