SD-73


 
Roto Grip SD-73
Roto Grip
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Release Date
PBA Approval Date
Discontinued

The SD-73™ Bowling Ball: The Bowling Ball that caused the BIGGEST controversy in PBA tour history.

Factory Finish
800 Matte
Sure Grip Solid Coverstock
Type
Solid Reactive
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Balls Similar to the Roto Grip SD-73
Ball Brand Comparison Grade Coverstock Factory Finish Core RG Diff MB Diff US/Overseas Release Discontinued
SD-73 Sure Grip SolidSolid Reactive 800 Matte High density cylinder with "flip" blockSymmetric 2.510 0.073
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Global Assault B Super Sure GripSolid Reactive 800 Matte Concave Radius High TorqueAsymmetric 2.505 0.055
Trauma ER B ACCU-Tread SolidSolid Reactive 1000 Matte External Motion Control QuadSymmetric 2.510 0.059
X Factor Triple Xtreme B ACCU-Tread SolidSolid Reactive 800 Matte RAD3Asymmetric 2.490 0.060 0.020
Assault B- Sure Grip Traction PlusSolid Reactive 1000 Abralon Concave Radius High TorqueAsymmetric 2.505 0.055
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X Factor Vertigo B- SFA SolidSolid Reactive 800 Matte RAD3Asymmetric 2.490 0.060 0.020
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Frankie May Signature Gryphon C+ React A Tack SolidSolid Reactive 400 Matte Gryphon II (G-3)Symmetric 2.497 0.056
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