• 3:57
    Bowling Balls: Differential, RG & Cores

    Bowling balls are made with different coverstocks and cores. Scott Pohl, owner of On Track Pro Shop, breaks down differential, RG, cores and what it all means to you and your game. Low RG vs. High RG The USBC defines RG (radius of gyration) as: Measured in inches, radius of gyration is the distance from

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