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

Coverstock Specs
Type:Reactive Hybrid
Box Finish:3000 Grit Sanded
Color:Neon Green Pearl / Blood Red
Core Specs
Name:Middle Roll 70
Int. Diff:0.000

The Roto Grip Asylum joins the Disturbed and Deranged in the popular HP3 line. It features the symmetrical Middle Roll 70 core surrounded by a hybrid reactive coverstock called 63MH.

Note to subscribers: The Roto Grip Asylum was released during Bowling This Month’s transition period from print magazine to online magazine. We were not able to perform our standard three tester / four oil pattern test sequence on this ball. However, we did perform the on-lane testing required to generate the performance ratings (torque, length, back end, and total hook) that are found in our comparison tables and graphs. These

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.