Description
The Roto Grip Perfect Gem combines the GEM + A.I. asymmetric core with the E-R1 Solid Reactive coverstock. Its 2000-grit Abralon finish provides traction on medium-heavy to heavy oil while the updated core and cover help it travel cleanly through the fronts and continue strongly downlane.
Release date: October 2, 2026. Orders placed before release are preorders and ship when the ball becomes available.
Pin distance and top weight: Enter your preferences in the request box on this page before adding the ball to your cart. We will confirm whether your requested specifications are available.
GEM + A.I. core
Roto Grip refined the density of the original GEM core and paired it with A.I. Core Technology. The revised asymmetric design has a slightly higher RG for cleaner travel through the front of the lane and an increased differential for strong flare and continuous motion through the pins.
Core numbers by weight
| Weight | RG | Differential | PSA |
|---|---|---|---|
| 16 lb | 2.49 | 0.055 | 0.017 |
| 15 lb | 2.49 | 0.057 | 0.017 |
| 14 lb | 2.52 | 0.056 | 0.016 |
| 13 lb | 2.57 | 0.032 | 0.010 |
| 12 lb | 2.59 | 0.029 | 0.008 |
Specifications
- Coverstock: E-R1 Solid Reactive
- Core: GEM + A.I. asymmetric
- Finish: 2000-grit Abralon
- Color: Pink / Rose / Onyx
- Flare potential: High
- Available weights: 12–16 lb