Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Hammer Redemption Solid
|
Roto Grip Transformer
|
Roto Grip Perfect Gem
|
Brunswick Combat Solid
|
|
|---|---|---|---|---|
| Brand | Hammer | Roto Grip | Roto Grip | Brunswick |
| Line | High | HP5 | HP4 | Pro |
| Coverstock | Aggression NE Solid | VR1 Solid | ER1 Solid | HK22C² - Alpha Premier Solid |
| Cover type | Solid reactive | Solid reactive | Solid reactive | Solid reactive |
| Core | Redemption | Morph Wing | Gem AI | Rampart |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.498 | 2.500 (16 lb) | 2.490 (16 lb) | 2.502 |
| Diff | 0.053 | 0.050 (16 lb) | 0.055 (16 lb) | 0.051 |
| Int. diff | 0.015 | 0.015 | 0.017 | 0.019 |
| Factory finish | 360, 500, 2000 Siaair Micro Pad | 4000 Grit | 2000 Grit | 500, 1500 Siaair Micro Pad |
| Lane condition | Heavy oil | — | — | — |
| Flare potential | — | High | High | — |
| Reaction | Aggressive hook | — | — | — |
| Color | Black / Orange / White | Indigo / Violet / Slate | Pink / Rose / Onyx | Navy / Blue / Slate / Purple |
| Release date | February 20, 2020 | January 23, 2026 | October 2, 2026 | August 13, 2026 |
| Status | Retired | Current | Current | Current |
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