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:May 2023
Coverstock Specs
Name:MicroTrax Pearl Reactive
Type:Reactive Pearl
Box Finish:Reacta Gloss
Color:Black / Electric Green
Core Specs
Int. Diff:0.000

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

The new Roto Grip Duo is the result of a collaboration with PWBA stars Stefanie Johnson, Shannon O’Keefe, and the Big Brothers Big Sisters organization. It pairs the polished MicroTrax Pearl coverstock used on the Exotic Gem with the new Mentor core. This symmetrical weight block design gives the Duo a 2.49″ RG and a 0.046″ differential. This is a slightly higher RG and lower differential than both the Torpex core from the TNT and the asymmetrical Defiant core from the Gem line. The Duo provided a lot of versatility for our three testers, and its versatility was further enhanced by how well the coverstock responded to surface changes.

Tweener edged out the other two testers with his reaction across all four test patterns, and he started striking quickly with the Duo on the fresh medium oil pattern. From the same line where the Duo was striking, he saw the Exotic Gem leaving 4 pins, while the Hyped Hybrid would leave 2 pin combinations. The Duo allowed him to easily stay ahead of the pattern when it started to break down by making small 2-and-1 moves inside. If he wanted to stay straighter up the lane toward the track area, he could increase his ball speed and roll up the back of the ball more to keep it in the pocket. Tweener found a very nice line to the pocket on the dry test pattern as well. The glossy finish on the pearl coverstock gave him the length he needed, and the back end motion was sharp but controllable. The MicroTrax Pearl

Additional Roto Grip Duo Resources

Click here to visit Roto Grip's website to read the manufacturer-supplied information on this ball. Also, see below for the manufacturer-produced promotional video for this ball.

Please remember that our reviews are solely based on our own testing and that you may sometimes find differences between our comments and ratings and the manufacturer's claims. Links to these manufacturer resources are provided here strictly for convenience purposes.

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.