Roto Grip
Defiant Soul
PatternStTwCr
Oily:999
Medium:886
Dry:654
Sport:776

(1-10 in order of Stroker (ST), Tweener (TW), Cranker (CR))

Coverstock Info
Name:
77H
Type:
Hybrid Reactive
Box Finish:
4000 Abralon
Color:
Green and Gold Pearl / Purple Solid
Core Info
Name:
NA
Type:Asymmetrical
RG:2.49
Total Diff:0.054
Int. Diff:0.017

The Defiant Soul is smack dab in the middle of every category of performance between the original Defiant and the Defiant Edge. By using the same weight block, the differences in reaction are all attributed to the coverstock. This one comes out of the box at a 4000 Abralon finish and uses the 77H hybrid cover. This combination will give the masses the best reaction on heavier type oil patterns.

We matched up best with the Defiant Soul on our heavy test pattern. The Soul pushed down the lane and was able to give us more recovery on the slicker pattern...

To read the full review, please visit:
https://www.bowlingthismonth.com/bowling-ball-review/roto-grip-defiant-soul/

Performance Ratings

NameValueComments
Torque
(1-10)
6.5
Like all the ratings on the Defiant Soul, the torque is right between the Defiant and Defiant Edge. With the box finish, the breakpoint is a strong arc. When polished, it is closer to a skid/flip reaction.
Length
(1-25)
12
The box finish gives this ball its read of the heads. The hybrid cover helps it store energy at the breakpoint.
Back End
(1-20)
16
The oil pattern will dictate how strong the back end reaction will be. We saw much more back end on our medium pattern than we did on the heavy pattern.
Total Hook
(1-100)
53
This ball fills the space between the Defiant and Defiant Edge. The majority of the hook from this ball takes place from the midlane.

Strengths: The Defiant Soul is the hybrid cover addition to the Defiant family. Users can expect less total motion than the Defiant, but stronger than the Edge.

Weaknesses: Trying to make this ball work on dry lanes will give users a headache. There are better options for these types of patterns.

Overall Summary: The Defiant Soul sits in the Roto Grip H4 line right between the Defiant and Defiant Edge. The Soul can be an addition to a current arsenal or can be a replacement for anyone still holding on to their Rogue Cell.