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Radical Evil Eye specs
The Radical Evil Eye is a solid reactive ball with the Evil Eye Symmetric 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) | Evil Eye Symmetric |
| Core type | Symmetric |
| RG | 2.495 |
| Differential | 0.046 |
| Factory finish | 500, 1500 Siaair Micro Pad |
| Maker's category | Top Shelf |
| Color | Black |
| Weights | 16-12 lbs. |
| Release date (maker) | October 23, 2025 |
| USBC approved | 14 October 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 2.495. That is lower than 55% 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 0.046. Higher than 46% of the balls in our table. Storm says "a low differential ball tends to have a more predictable, controlled motion."
Solid reactive cover. Storm says solid covers are "particularly effective on fresh oil patterns," and bowling.com calls them best on heavier oil.
Symmetric core. Storm says symmetric balls have "RG values consistent across all axes" and a smooth, predictable roll.
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:
- Radical Vexed Variant: RG 2.490, differential 0.045
- Brunswick Danger Zone: RG 2.501, differential 0.048
- Roto Grip Transformer: RG 2.500, differential 0.050
- 900 Global Viking Conquest: RG 2.500, 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.