- RST X-1

First Impressions
The Roto Grip RST X-1 comes in with a 2.53 RG, a 0.053 differential and a 0.016 intermediate differential in the asymmetric Roto Star Tour (RST) core. The MicroTrax Hybrid Reactive coverstock arrives out of the box with a 3000-grit Abralon surface and shows up in a combination of black, dark forest and forest pearl. This asymmetric creation should deliver consistent core torque and energy transfer where it's needed most. The MicroTrax Hybrid cover creates a larger-than-average footprint in the oil while at the same time offering above-average response to friction.
Comparison
The MicroTrax surface is very similar to Storm's NRG surface, though a bit stronger, and the 3000-grit hybrid version immediately brings the Storm PhysiX to mind. The overall package reads like a slightly smoother PhysiX or a more usable Halo Vision. You could almost compare this ball to an asymmetric IQ Tour, but with a bit more cover. Where the PhysiX could sometimes offer too much explosion on the backend, the RST still provides enough hook for heavier conditions but plays more comfortably. It sits on the rounder side of the asymmetric spectrum compared to the Storm Proton PhysiX, which stands up fairly aggressively.
On the Lanes
This ball is best suited to medium to heavier oil conditions and is designed in particular for tournament players looking for maximum control. The RST X-1 offers a very controllable and predictable reaction with hook in the oil and a strong, angular shape at the breakpoint. Professional players appreciate the continuous motion with minimal deflection as it enters the pocket. Power players love the backend motion on heavy oil patterns, while the dull box finish provides enough traction through the oil and the hybrid cover helps conserve energy for the breakpoint and backend. If you have a higher rev rate, this ball makes sense as the top ball in your arsenal, where you don't need something as strong as the Proton PhysiX.