StrikeStack
Ball library
Roto Grip Transformer bowling ball

Roto Grip

Transformer

Released January 2026

Heavy OilMid HookContinuous
Hook strength
8/10

Specs

Coverstock
V-R1 Solid Solid Reactive
Core
Morph-Wing Asymmetric
RG
2.510
Differential
0.051
Intermediate diff (mass bias)
0.015
Factory finish
4000 Abralon
Released
January 2026

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

Balls that react like the Transformer

More from Roto Grip