StrikeStackBall library
Hammer Effect Black Solid Urethane bowling ball

Hammer

Effect Black Solid Urethane

Released September 2025

Medium OilEarly HookTraction
Hook strength
7/10
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Specs

Coverstock
Hammer Solid Urethane Urethane Solid
Core
Huntsman Asymmetric
RG
2.470
Differential
0.050
Intermediate diff (mass bias)
0.017
Factory finish
500/1000 Siaair Micro Pad
Released
September 2025

The oil, hook and strength labels are StrikeStack's estimate from the published specs, not the manufacturer's rating. Specs provided by bowwwl.com.

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