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

Reviewed:December 2010
Coverstock Specs
Name:Insight Solid Reactive
Type:Reactive Solid
Box Finish:2000 Abralon
Color:Two Tone Red / Royal Blue
Core Specs
Int. Diff:0.013

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

The Roto Grip Theory features the Insight Solid Reactive shell that is finished with 2000 Abralon. This ball is the latest addition to Roto Grip’s Crown line and it has a new core with a lower RG and higher differential compared to the Cell series.

All three testers had their best looks with the Theory on the oily test pattern. The ball created strong traction in the midlane with its 2000 grit box finish and a continuous back end reaction. Cranker was able to achieve recovery from almost anywhere on the heavy pattern. Tweener’s reaction was almost equal to that of Cranker’s on this pattern, just farther to the right. Stroker was the straightest and slightly deeper than normal. This was a major

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.