Roto Grip Perfect Gem

The Roto Grip Perfect GEM takes the legendary strength of the GEM line and evolves it into a cleaner, stronger, and more versatile option for medium-heavy to heavy oil conditions. Built around the proven DNA of the original GEM core, the Perfect GEM strategically refines the core’s density and integrates advanced A.I. Core Technology to create a slightly cleaner motion through the front of the lane while maintaining the powerful, heavy-rolling continuation bowlers expect from the series. The updated design features a higher RG for easier travel through the heads and increased differential for more flare potential and overall movement. The result is a strong, continuous reaction that stores energy more effectively and drives through the pins with impressive power. Wrapped around the core is the new E-R1 Solid Reactive coverstock. This nano-free formulation creates a different type of traction than previous GEM releases, allowing the Perfect GEM to clear the front of the lane more easily while delivering an extreme response to friction down lane. Finished at 2000-Grit Abralon, it provides the traction needed for heavier conditions without burning up too early as the lanes begin to transition. If you loved the original GEM but want more length, more versatility, and a stronger move down lane, the Roto Grip Perfect GEM delivers. It combines the raw power of a proven legend with a cleaner, more responsive shape and continuous energy through the pins—creating a powerful motion that may be the most complete GEM yet.