A Pro Pin bowling ball from SPI Bowling Products (Storm, Roto Grip, and 900 Global) is where the Pin (Core Top) distance from the CG (Center of Gravity) is 6 - 6 1/2" out. Anything more than 6 1/2" would be considered an X-Blem.
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 IQ Tour A.I. builds on the classic design you know and love, enhancing it with cutting-edge A.I. Core Technology for superior performance. It keeps the trusted R2S Coverstock, delivering the iconic control and adaptability that bowlers everywhere rely on. With A.I. Core Technology, this ball takes things further—fine-tuning energy delivery on contact to widen the sweet spot and boost pin action, even on off-hits. You’ll get a steady, dependable roll that elevates your game, strike after strike.
Here's what Storm has to say about the IQ Tour A.I.:
The IQ Tour A.I. takes everything you love about the original and elevates it with A.I. Core Technology, pushing performance to the next level. Featuring the same proven R2S Coverstock, this ball maintains the legendary control and versatility that has made the IQ Tour a staple in arsenals worldwide. However, the integration of A.I. Core Technology unlocks even greater potential—optimizing energy transfer at impact to expand the strike window and turn near-misses into unmatched pin carry. The result? A more consistent, reliable reaction that helps you roll your best game, shot after shot.
