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Brunswick Warning Alert specs
The Brunswick Warning Alert is a hybrid reactive ball with the Alert 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 | HK22 - Savvy Hook Hybrid |
|---|---|
| Cover type | Hybrid reactive |
| Core (weight block) | Alert |
| Core type | Not stated |
| RG | 2.478 |
| Differential | 0.037 |
| Factory finish | 500, 1000, 1500 Siaair / Crown Factory Compound |
| Maker's category | High |
| Color | Lapis / Black |
| Weights | 16-12 lbs. |
| Release date (maker) | August 13, 2026 |
| USBC approved | 30 June 2026 |
Numbers as Brunswick 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 2.478. That is lower than 80% 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 0.037. Higher than 27% of the balls in our table. Storm says "a low differential ball tends to have a more predictable, controlled motion."
Hybrid reactive cover. Hybrids mix solid and pearl; Storm says they suit bowlers who need a ball "that can adapt to a variety of lane conditions."
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 Brunswick.
Balls with similar numbers
Same cover type, closest RG and differential in our table:
- Roto Grip Gremlin Tour-X: RG 2.480, differential 0.032
- Radical Intel Recon Hybrid: RG 2.483, differential 0.032
- 900 Global Cove: RG 2.480, differential 0.043
- Hammer Black Widow Tour V1: RG 2.500, differential 0.034
Sources: Brunswick 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.