Bowler Ratings


Bowler ratings are from 1 to 10 in order of Stroker (ST), Tweener (TW), Cranker (CR)

Note: Ratings are only available to our premium members.

General Info

Name:RST X-1
Reviewed:November 2020
Coverstock Specs
Name:MicroTrax Hybrid
Type:Reactive Hybrid
Box Finish:3000 Abralon
Color:Black / Dark Forest / Forest Pearl
Core Specs
Name:RST (Roto Star Tour)
Int. Diff:0.016

For details on our standard test layouts, please click here.

The RST X-1 is the first entry into a new series in the HP4 line for Roto Grip. This ball features the brand new asymmetrical Roto Star Tour (RST) core, with an RG of 2.53″, a differential of 0.053″, and an intermediate differential of 0.016″. The new core is surrounded by the new MicroTrax Hybrid coverstock that comes out of the box at a 3000 Abralon finish. We have seen the solid MicroTrax cover on the Halo, Idol, and UFO, but this is our first look at the hybrid version. This core and cover pairing gives the RST X-1 hook in the oil and a strong angular shape at the breakpoint. It had no trouble handling the oil volume of any of our test patterns.

Cranker loved the back end motion this ball provided on the heavy oil pattern. The dull box finish gave him plenty of traction through the oil, while the hybrid shell helped his ball retain plenty of energy for the breakpoint and back end. While the RST X-1 had less overall hook than the Rubicon or UFO, its angular shape set it apart, allowing him to chase left and maintain carry as the pattern broke down. On the medium pattern, Cranker simply needed to move farther inside, but

Roto Grip RST X-1 Comparisons

Click below to see a comparison table of each pair of bowling balls shown:

To compare the Roto Grip RST X-1 to any other bowling ball(s), please use our Bowling Ball Comparison tool.

The BTM Ball Testing Team

About The BTM Ball Testing Team

The BTM Ball Testing Team is led by Eric Martinez. Our team of three testers has thrown and reviewed hundreds of bowling balls for Bowling This Month. When not testing balls for BTM, Eric owns and operates University Pro Shop in San Antonio, TX and he is an avid competitive bowler. Click here to learn more about how we test and review bowling balls.