The Spheroid core has many of the dynamic properties found in some of the most successful core shapes in the history of bowling. Arguably, the most successful shape in history was used in the original Blue Hammer. This design was the founding premise behind our new Spheroid shape. The large spheroid was dynamically engineered with large grooves strategically placed along four quadrants on the perimeter in order to lower the RG, while maintaining a medium to high differential for ideal ball reaction. The Spheroid maximizes the friction enhancing properties of the all-new Juiced Solid cover. As always with Hammer, we’ve poured the Spheroid core with Flex-Resin and the outer core with Carbon Fiber in order to create the hardest hitting and most durable ball possible.