Track Theorem Delta

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THE BENCHMARK EVOLVES! The Track Theorem earned its reputation as one of the best rolling balls in Track history by delivering a motion that simply worked across styles, conditions , and skill levels. Now, the Track Theorem Delta builds on that legacy, recreating the trusted Theorem shape with enhanced performance. Designed to stay true to the original’s benchmark performance, the Theorem Delta offers a powerful blend of strong midlane and a sharper response to friction, giving bowlers the best of both worlds. Compared to the original, it delivers added responsiveness downlane while preserving that sweeping ball motion that made the Theorem so reliable. The result is a versatile, go-to option that captures the essence of the original, now with more continuation and backend that Track fans love. Cover: Super Response Hybrid Reactive (HK22C)Cover Type: Hybrid ReactiveSurface: 500, 1000, 1500 Siaair / CompoundCore: MC2 Asym CoreCore Type: AsymmetricRG: 2.473 (15lbs)Diff: 0.046 (15lbs)Mass Bias: .017 (15lbs)Color: Black/Indigo/Blue Show more