Compare bowling balls
Core numbers are compared in one weight. Some brands only publish them for one weight.
Track Proof Pearl
|
Roto Grip RST Hyperdrive Pearl
|
Brunswick Strategy
|
Hammer Zero Mercy Pearl
|
|
|---|---|---|---|---|
| Brand | Track | Roto Grip | Brunswick | Hammer |
| Line | Upper Mid | HP4 | Pro | High |
| Coverstock | Prime Response Pearl | U-R1 Pearl | HK22C² - EVO Pearl | HK22C² Pearl |
| Cover type | Pearl reactive | Pearl reactive | Pearl reactive | Pearl reactive |
| Core | Proof | RST AI | Dual Centric | Super Offset |
| Core type | Asymmetric | Asymmetric | Asymmetric | Asymmetric |
| RG | 2.519 | 2.510 (16 lb) | 2.509 | 2.524 |
| Diff | 0.052 | 0.051 (16 lb) | 0.047 | 0.053 |
| Int. diff | 0.020 | 0.016 | 0.016 | 0.020 |
| Factory finish | 500, 1000 Siaair / Crown Factory Compound | Power Edge | 500, 1000, 1500 Siaair / Crown Factory Compound | 500, 1000, 1500 Siaair / Factory Compound |
| Lane condition | Medium oil – Heavy oil | — | — | Medium oil |
| Flare potential | — | High | — | — |
| Reaction | Strong midlane and continuation | — | — | Excessive backend |
| Color | Black / Smoke Pearl | Space Blue / Deep Purple | Black / Blue / Silver | Silver / Orange / Black |
| Release date | — | September 19, 2025 | April 16, 2026 | November 20, 2025 |
| Status | Retired | Current | Current | Current |
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