StrikeStack
Ball library
Ebonite Pivot Rotation bowling ball

Ebonite

Pivot Rotation

Released December 2025

Heavy OilEarly HookContinuous
Hook strength
10/10

Specs

Coverstock
HK22C - XL4500 Plus Solid Reactive
Core
VIF 2.0 Asymmetric
RG
2.481
Differential
0.050
Intermediate diff (mass bias)
0.017
Factory finish
500/1000/1500 Siaair Micro Pad
Released
December 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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