Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Hammer Zero Mercy Solid
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Brunswick Combat Solid
|
Track Synthesis
|
Roto Grip Perfect Gem
|
|
|---|---|---|---|---|
| Brand | Hammer | Brunswick | Track | Roto Grip |
| Line | High | Pro | High | HP4 |
| Coverstock | HK22C² Solid | HK22C² - Alpha Premier Solid | QR-12 Solid (HK22C) | ER1 Solid |
| Cover type | Solid reactive | Solid reactive | Solid reactive | Solid reactive |
| Core | Super Offset | Rampart | I-Core Gen4 | Gem AI |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.524 | 2.502 | 2.480 | 2.490 (16 lb) |
| Diff | 0.053 | 0.051 | 0.053 | 0.055 (16 lb) |
| Int. diff | 0.020 | 0.019 | 0.020 | 0.017 |
| Factory finish | 500, 1500 Siaair Micro Pad | 500, 1500 Siaair Micro Pad | 500, 1500 Siaair Micro Pad | 2000 Grit |
| Lane condition | Heavy oil | — | Heavy oil | — |
| Flare potential | — | — | — | High |
| Reaction | Xtreme hook | — | Strong mid-lane and backend | — |
| Color | Black / Purple / White / Red | Navy / Blue / Slate / Purple | Royal Blue / Grey / Purple | Pink / Rose / Onyx |
| Release date | November 20, 2025 | August 13, 2026 | February 19, 2026 | October 2, 2026 |
| Status | Current | Current | Current | Current |
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