Radius of Gyration (RG): 2

firmer design of the Robby's Plus

Coverstock: ECA-XR

the same popular shape used in the popular Freakshow line

Reaction: All Purpose with Strong Backend

900Global Volt deals & steals Radius of Gyration (RG): 2The 900Global Volt upper mid performance bowling ball uses the S72R Pearl coverstock which is the S72 Pearl coverstock with a catalyst added. This coverstock was designed to balance the ball's traction in oil and increase its performance at the backend. The Volt uses the Charged Symmetric Core which has a flip block on the bottom that will increase the change of direction at the breakpoint. Color: Sapphire Pearl All colors do vary somewhat from the