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:January 2015
Coverstock Specs
Type:Reactive Pearl
Box Finish:1500 Grit Polished
Color:Cobalt Blue
Core Specs
Name:Late Roll 69
Int. Diff:0.000

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

The Roto Grip Unhinged is the latest release from Roto Grip in the HP3 line. This ball uses the same Late Roll 69 core as the Hysteria. This time, this weight block is surrounded by the 60M pearl cover that comes out of the box at a 1500 grit polished finish. This change in coverstock allows the Unhinged to have more length, back end, and total hook than the Hysteria.

We saw this ball have its best reaction on our medium test pattern. The Unhinged easily cleared the front of the lane, started to pick up strong in the midlane, and then made a powerful move at the back end

Roto Grip Unhinged Comparisons

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

To compare the Roto Grip Unhinged 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.