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Ball Review


51 Hook 16 Length 16 Breakpoint Shape ROTO GRIP: UNHINGED

Manufacturer’s Intent: “A variety of reaction is always the first thought in each line with Roto Grip,” says Roto Grip’s Chris Schlemer. “So we took the Late Roll 69 core and wrapped it with the new 60M pearl reactive cover to create more skid and snap than the Hysteria [September 2014], which was a solid shiny cover. This ball provides the most kick off the breakpoint since the Silver Streak Pearl of yesteryear. Yes, even more reaction downlane than the Uproar [February 2014], but not as early a motion as the Hyper Cell Skid [reviewed this month].”

Core: The Late Roll 69 symmetrical core, also used in the Hysteria, has an RG of 2.58 and a differential of .049. We had about four inches of flare.

Coverstock: The cobalt blue 60M pearl reactive cov- erstock comes out of the factory finished with 1500-

grit polish. We measured an RA value of 1.99 with an effective surface grit of 5110.

Overview: The Unhinged unleashes a nice push through the fronts with a strong, smooth motion on the back. On the light house pattern, this piece was a striking machine. We played around 13-14 to the track area with hold and recovery from the 5-board. The back-end motion created a strong drive through the pins and kept them dancing as the ball drove through the 8- and 9-pins. We could use the Unhinged on the fresh USBC Doubles/ Singles pattern, but it was a little strong on this flatter Sport pattern. As we got carrydown, how- ever, we were able to get lined up easily. We played in the track area with recovery and some hold left. I think the Unhinged would be your lat- er-shift ball on Sport patterns. On Stone Street,


it cut through the pattern better than I thought it would; because of the length, pearls typically don’t match up that well. We played up the track area with a more direct line, but the breakpoint wasn’t too late to create good angle and carry on this pattern. The Unhinged was easily cleaner and stronger on the back than the Hysteria, which was a little earlier and smoother on our patterns. You get more predictability from the Unhinged than from many other pearl balls. I see higher rev players using this motion and predictability to aug- ment their arsenals.

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