Radical Katana Assault Bowling Ball | BowlersMart The Katana Assault has an RG of 2.501 a differential of 0.051 and an intermediate differential of 0.020. This core yields a quick response to friction and a lot of continuation through the pins. The Katana Assault and the new chemical compound cover known as HK-22 Pearl create a new level of backend reaction. This is a Katana on steroids.
- Recommended Lane Condition: Heavy Oil.
- Color: Smoke/Black/Blue.
- Core: Katana Assault Asymmetric.
- Coverstock: HK22.
- HyperKinetic Pearl Reactive.
- Finish: 500 1000 1500 Siaair/Crown Factory Compound.
- RG: 2.501 15# ball.
- Differential: 0.