Roto Grip Perfect Gem Bowling Ball Color: Pink/Rose/Onyx Coverstock: E-R1 Solid Reactive Weight Block: GEM + A.I. Core Technology Factory Finish: 2000-Grit Abralon Flare Potential: High Radius of Gyration (RG): 16lbs - 2.49; 15lbs - 2.49; 14lbs - 2.52 Differential (Diff): 16lbs - 0.055; 15lbs - 0.057; 14lbs - 0.056 Intermediate Differential (Diff): 16lbs - 0.017; 15lbs - 0.017; 14lbs - 0.016 Fragrance: N/A Behind The Design: The evolution of the GEM line reaches its peak with the PERFECT GEM. We’ve taken the DNA of the original GEM core and strategically altered its density to integrate seamlessly with our revolutionary A.I. Core Technology. This precise calibration enhances the core's natural physics, thus creating a more continuous motion that maximizes energy transfer through the pins for the most "perfect" ball motion we've engineered to date. Surrounding this high-torque weight block is our brand-new E-R1™ (EXTREME-Response Version 1) Solid Reactive coverstock. This cutting-edge, nano-free formulation creates a completely different footprint on the lane compared to our previous-generation materials, altering the surface contact zone to blend seamless front- lane cleanliness with a more extreme respsonse down lane. Factory-finished at a 2000-Grit Abralon baseline for an optimal balance of traction and recovery, the E-R1 cover effortlessly glides through the heads to preserve its extreme response to friction down lane even as the oil pattern begins to transition. Specifically calibrated for Medium/Heavy to Heavy Oil, the PERFECT GEM is for the bowler who craves maximum reaction without the early burnout. THIS IS the cleaner, stronger, and more versatile version of a legend, providing the definitive blend of raw strength and modern continuation into one "perfect" ball.
