Roto Grip · HP4 line
The Roto Grip RST Hyperdrive Pearl is an asymmetrical pearl bowling ball from Roto Grip's HP4 line, released in September 2025. It has the U-R1 Pearl coverstock and the RST AI weight block, finished at Power Edge out of the box. At 15 lb its RG is 2.52, with a differential of 0.055 and a PSA of 0.017.
Among the 65 balls here with a 15 lb version, its RG is medium, and its differential is high, for more flare. Its reaction ratings suit it to medium to heavy oil and medium to long patterns in transition conditions, with a late hook, an angular turn at the breakpoint and high flare.
Specs
Details
- Coverstock
- U-R1 Pearl
- Weight block
- RST AI
- Core
- AI
- Symmetry
- Asymmetrical
- Factory finish
- Power Edge
- Durometer
- 73-75
- Flare potential
- High
- Color
- Space Blue/Deep Purple
- Release date
- 09/19/25
Reaction
- Flare Potential10
- Ball Shape9
- Hook Length8-10
- Oil Volume6-8
- Pattern Length7-9
- Lane Condition5-7
Tech specs
| Weight | RG | Diff | PSA |
|---|---|---|---|
| 12 lb | 2.58 | 0.031 | 0.009 |
| 13 lb | 2.56 | 0.034 | 0.011 |
| 14 lb | 2.54 | 0.055 | 0.017 |
| 15 lb | 2.52 | 0.055 | 0.017 |
| 16 lb | 2.51 | 0.051 | 0.016 |
Balls most like it
Available balls closest to the Roto Grip RST Hyperdrive Pearl on the six reaction ratings; 100% is an identical reaction.
Storm Identity Pearl95%
Storm Identity B/C/P Pearl95%
Roto Grip Transform Pearl Pearl94%
Roto Grip Gremlin Pearl92%
Storm Equinox Hybrid Hybrid87%
Storm Phaze II Pearl Pearl87%
Roto Grip Transformer Solid84%
Storm Rocket A.I. Pearl84%
Related balls
The rest of Roto Grip's HP4 line.
