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.