A Pro CG bowling ball from SPI Bowling Products (Storm, Roto Grip, and 900 Global) is where the CG (Center of Gravity) ends up extremely far left or right of the Pin (Core Top) and the PSA (Preferred Spin Axis or Mass Bias) marking.
This is a premium, first-quality ball crafted to the same exacting standards as the rest of these elite lines - ensuring top-tier performance and durability without any compromises.
Due to changes in the USBC rules for static balances and weight holes, Pro Pins/Pro Cg's no longer have specialized and unique layouts. These balls can be drilled using any of the SPI drilling layouts. NOTE - On Pro CG balls, the final placement of the CG (Center of Gravity) will appear to be in an odd location but this will not affect the ball reaction.
The Next Factor pays tribute to the iconic asymmetric cores that made Storm a household name. Built around the RAD-TQ engine, this modern core shape closely mirrors the legendary X-Factor released in 2002. Featuring a high RG, high differential, and a controlled PSA value, the design clears the heads with ease before unleashing a powerful and defined motion at the breakpoint. To fully enhance this core’s intent, the R3S coverstock was selected—positioned perfectly between R2S and TX-16 for the ideal blend of midlane traction and sharp backend. When the lanes call for increased angle and dynamic continuation, the Next Factor is ready to attack with the aggressive motion bowlers loved from the original X-Factor line.
Here's what Storm has to say about the Next Factor:
The Next Factor represents a throwback to one of the asymmetric weight blocks that helped put Storm on the map. RAD-TQ features an optimized shape that is almost identical to the X-Factor that was introduced back in 2002. Like the X-Factor, the Next Factor uses a unique combination of a high RG, high differential, and a relatively conservative PSA strength. This adds up to a design that ignores the front part of the lane and unleashes one of the most devastating backend shapes ever seen. The R3S cover was chosen to accentuate the characteristics of the weight block. Fitting right between R2S and TX-16, R3S will give you that rare combination of control and angularity the X-Factor was famous for. The Next Factor will be right at home when it becomes necessary to open your angle of attack.
