Storm !Q Tour Sapphire Color: Sapphire Coverstock: R2S Pearl Reactive Weight Block: C3 Centripetal Control Core Factory Finish: Power Edge Flare Potential: Medium-Low Radius of Gyration (RG): 16lbs - 2.49; 15lbs - 2.49; 14lbs - 2.54 Differential (Diff): 16lbs - 0.035; 15lbs - 0.029; 14lbs - 0.034 Intermediate Differential (Diff): N/A Fragrance: Blueberry Additional product information: The !Q Tour Sapphire is here to deliver that same legendary feel and reaction that bowlers loved from the !Q Tour Ruby! The original !Q Tour line earned its reputation through the proven performance of the R2S coverstock, and the Sapphire proudly continues that legacy. R2S remains unmatched when it comes to generating friction on dry lane conditions, while the Power Edge finish adds just the right amount of traction in the oil to create a smooth, blended motion through the backend. At the heart of the !Q Tour Sapphire lies the iconic C³ Centripetal Control Core—Storm’s gold standard for benchmark reaction. For over a decade, this core has defined the perfect balance between power and control, giving bowlers the confidence to stay one step ahead on both league and tournament conditions.