Storm Concept Bowling Ball Brand_Roto Grip while the lightweight TPU outsole

while the lightweight TPU outsole ensures flexibility and minimal break-in time

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Top shoe compartment holds up to size 15 shoes

Keep your equipment organized

Storm Concept Bowling Ball Brand_Roto Grip while the lightweight TPU outsoleStorm Concept Bowling Ball The SPI LAB Series introduces the Concept, our next innovative release that reverses the narrative on how core cover combinations are developed for challenging patterns. The ARC Cover has the highest coefficient of friction (COF) values and is right at the USBC limit on oil absorption time. With the Concept, the coverstock acts as both the engine and the tires, while the Radius Weight Block behaves as the traction control,