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Gem Blue SapphireReference Ball
Roto Grip

Roto Grip

Gem Blue Sapphire

Not sold in shop

Sometimes evolution can spark new life into technology from yesteryear. Such is the case with our latest introduction to the HP4 Line of balls. With recent more in-depth studies of flare migration and core tendencies we circled the wagons back to the Defiant Series of bowling balls which featured a core ahead of its time regarding flare migration in order to create a longer constant motion. Upon further review and testing, we found that by altering the composite of this core shape, we were able to create the fastest revving, strongest continuing, lowest RG asymmetrical core we have ever offered in the history of ever now known as the DEFIANTâ„¢ LRG CORE.

Technical Specs

CoverstockHyper Response Pearl
Weight BlockDefiant LRG
Core Typeasymmetric
RG2.47
Differential0.053
Mass Bias0.016
Factory Finish2000 Abralon
Cover Typepearl
Weight Range16-12 lbs.
Release DateSeptember 2, 2025
Manufacturer Page

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