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Hammer Black Widow Tour V1 specs
The Hammer Black Widow Tour V1 is a hybrid reactive ball with the Gas Mask Low Diff 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 - Aggression Hybrid |
|---|---|
| Cover type | Hybrid reactive |
| Core (weight block) | Gas Mask Low Diff |
| Core type | Not stated |
| RG | 2.500 |
| Differential | 0.034 |
| Mass bias / intermediate diff. | 0.016 |
| Factory finish | 500, 1000, 3000 Siaair Micro Pad |
| Maker's category | Upper Mid Performance |
| Color | Black / Blue / Purple |
| Weights | 16-12 Pounds |
| Release date (maker) | September 18, 2025 |
Numbers as Hammer 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 2.500. That is lower than 43% of the 134 current reactive and urethane balls in our table, so it sits on the high side. Storm says "a high RG ball delays its revving, offering more length and angular motion down the lane."
Differential 0.034. Higher than 15% 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 Hammer.
Balls with similar numbers
Same cover type, closest RG and differential in our table:
- Radical Intel Recon Hybrid: RG 2.483, differential 0.032
- Roto Grip Gremlin Tour-X: RG 2.480, differential 0.032
- Brunswick Warning Alert: RG 2.478, differential 0.037
- Brunswick Fury - Emerald / Black: RG 2.524, differential 0.038
Sources: Hammer product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Equipment Specifications Manual.