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Radical Outer Limits Black Hole specs
The Radical Outer Limits Black Hole is a solid reactive ball with the Outer Limits Asymmetric core. Here are its published specs, how they compare with the other current balls in our table, and what the numbers mean on the lane.
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| Coverstock | HK22C Solid |
|---|---|
| Cover type | Solid reactive |
| Core (weight block) | Outer Limits Asymmetric |
| Core type | Asymmetric |
| RG | 2.499 |
| Differential | 0.051 |
| Mass bias / intermediate diff. | 0.014 |
| Factory finish | 500, 1000, 1500 Siaair / Factory Compound |
| Maker's category | Reliable |
| Color | Black |
| Weights | 16-12 lbs. |
| Release date (maker) | January 8, 2026 |
| USBC approved | 30 December 2025 |
Numbers as Radical publishes them, checked 21 October 2026. Published for a 15-pound ball. Drilling changes how a ball behaves, so a pro shop's layout matters as much as these numbers.
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What the numbers mean
RG 2.499. That is lower than 52% of the 134 current reactive and urethane balls in our table, so it sits on the low side. Storm says "a low RG ball will rev up quickly and roll smoothly."
Differential 0.051. Higher than 65% of the balls in our table. Storm says "a high differential ball will create a sharper angle of entry into the pins."
Solid reactive cover. Storm says solid covers are "particularly effective on fresh oil patterns," and bowling.com calls them best on heavier oil.
Asymmetric core. Storm says asymmetric balls have "varying RG values along different axes" and more angular motion.
USBC allows an RG from 2.447 to 2.813 inches and a differential of at most 0.060 inches (Equipment Specifications Manual, March 2026). Our ball spec table lists every current ball we track, and who makes bowling balls covers which company owns Radical.
Balls with similar numbers
Same cover type, closest RG and differential in our table:
- Brunswick Combat Solid: RG 2.502, differential 0.051
- Roto Grip Transformer: RG 2.500, differential 0.050
- 900 Global Viking Conquest: RG 2.500, differential 0.050
- Hammer Spawn: RG 2.501, differential 0.050
Sources: Radical product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Approved Ball List (20 October 2026); USBC Equipment Specifications Manual.