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Ball Review

Roto Grip: Disturbed Hook 55 • Length

“For some time we have discussed the idea of a lower RG symmetrical core for the Roto Grip brand,” says Roto Grip’s Chris Schlemer. “That

has now come to fruition with the Middle Roll 70 weight block. Coupling the new weight block with the 66MH solid reactive coverstock, the Disturbed means business on medium to heavy oil

conditions. This ball now anchors the HP3 line, and will create motion in the midlane that Roto Grip fans have not seen in a long while.”

Core Design: The Middle Roll 70 symmetric core is all about rolling early and smoothly. The RG is

reasonably low at 2.50 and the .043 diff erential will produce nearly 5

inches of oil-loving track fl are. The new design was easy to rev and rewarded us with very good carry on less-than- perfect releases.

Coverstock: Supplying the needed lane traction is the solid 66MH reactive cover, which is factory fi nished at a 2000 dull grit. Colors are a fun lime green and black mix with neon yellow

12.5 • Breakpoint Shape 15

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lettering. Oil traction is above

average and response off friction is moderately quick, yet strong. The measured Ra is 7.5. The surface grit is 3000.

Test Results: Some balls, like

the Disturbed, create a visual motion down the lane that just looks impressive and powerful. We saw very quick revs right off the hand for all testers and a strong, continuous down-lane breakpoint motion. The new

core shape and low RG were major contributing factors to this reaction. In regard to hook, the Disturbed read the midlane earlier than a like-drilled Berserk (September 2012) and hooked a few boards more on average. We tried throwing the Disturbed through the breakpoint, but its strong core and 2000- grit solid cover would not allow it. It’s possible that Osku Palermaa, with his 22-mph-plus ball speed, could.

When to Use: The Disturbed will match up well for speed-dominant players and those bowling on heavier volume oil patterns. The fact that it’s not a premium- priced product does not diminish any of this ball’s attributes. It just loves oil. Most players can easily play in the oil pattern and fi re away; there is little need to send it near friction areas to create entry angle.


Roto Grip: Defi ant Soul Hook 57 • Length13.5 • Breakpoint Shape 16

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Roto Grip’s Chris Schlemer says, “What everyone will quickly notice is the reaction diff erence in

friction without the Micro Bite technology in the coverstock. Even with the 4000 Abralon box fi nish, this ball is cleaner than the Defi ant [February 2012] but not as long as the Defi ant Edge [August 2012], thus creating more midlane than ever before and

an even stronger motion through the back part of the lane.”

Core Design: The Paragon asym- metric core generates the V8 power for Roto Grip’s premier HP4 Defi ant Soul. The RG remains low at 2.49 and the diff erential huge at .054. The PSA came in at .017 (this can be used to help fi ne-tune your desired motion shape).

Coverstock: The 77H Hybrid cov- erstock is factory sanded with a 4000-grit Abralon pad. This produc- es a measured Ra value of 5.2 and a surface grit of 4300, both great on medium-heavy volumes. Colors are a soulful mix of purple solid and gold and green pearl. Oil traction is above

average, and dry lane response is moderately quick yet strong. Test Results: The Defi ant Soul creates a motion range much diff erent than what we saw from the earlier released Defi ant solid and Defi ant Edge pearl. Removal of the Micro Bite additive creates a cleaner projection through the front and midlane, even with a dull factory fi nish. Combine this cleaner cover with the assertive Paragon asymmetric core, and players will see a powerful back- end motion shape. Overall hook is between the previously released Defi - ants. The ball’s ability to handle oil vol- ume rivals that of the Defi ant solid, but with a stronger move in the fi nal 20 feet. When to Use: With the strong attri- butes of the core and cover, the Defi - ant Soul is destined for use on medi- um-heavy to heavier oil volumes for the vast majority of player styles. Those with down-and-in styles should consider lon- ger pin distances between 5 and 6 inches from their PAPs. They can alter the “buff er distance” from the pin to the VAL to ei- ther quicken or retard the response time off friction areas. Ball drillers should pay attention to the marked PSA location, which can also help shape the desired motion.

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February 2013

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