The evolution of the Gem line reaches its peak with the Roto Grip Perfect Gem. Roto Grip took the DNA of the original Gem core and strategically altered its density to integrate with its A.I. Core Technology, a precise calibration that enhances the core’s natural physics for a more continuous motion and maximum energy transfer through the pins: the most “perfect” ball motion Roto Grip has engineered to date.
Surrounding that high-torque weight block is the brand-new E-R1 Solid Reactive coverstock (EXTREME-Response Version 1), a nano-free formulation that puts a completely different footprint on the lane than Roto Grip’s previous-generation materials. Finished at 2000-Grit Abralon and calibrated for medium-heavy to heavy oil, the Perfect Gem is for the bowler who craves maximum reaction without the early burnout. It is the cleaner, stronger, and more versatile version of a legend, in Pink / Rose / Onyx.