14lb RST X-4 Pearl X-Comp

Roto Grip RST X-4 Pearl

The RST X-4 Pearl continues the legacy of Roto Grip’s renowned RST (Rotational Stabilization Technology) Core, a design celebrated for its ability to deliver controlled torque, superior energy transfer, and exceptional stability across the lane. Built to match the demands of modern rev rates, the RST Core maintains its dynamic integrity after drilling, ensuring reliable motion from front to back.

For the X-4 Pearl, Roto Grip has enhanced the core system by introducing a larger mass at the base, boosting continuation and creating a Tour-level motion that stays steady through the midlane while releasing explosive energy at the breakpoint. This updated core design pairs perfectly with a responsive pearl cover, giving bowlers a clean look through the fronts and a sharp yet controlled backend.

Whether you’re a competitive athlete or a performance-driven enthusiast, the RST X-4 Pearl offers a powerful blend of stability, adaptability, and finishing strength—raising the bar for high-performance asymmetric pearls.

Performance Highlights:

• Features the advanced RST Core, engineered for consistent torque and optimal energy transfer

• Enhanced base mass increases continuation and preserves motion integrity after drilling

• Clean through the heads with a strong, controlled backend response

• Ideal for bowlers seeking Tour-level performance in medium to heavier conditions

• Approved for all USBC-sanctioned play (note: may not be approved for PBA competition—confirm rules before use)